DEL WEBB CORP
424B5, 1999-02-01
OPERATIVE BUILDERS
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<PAGE>   1
 
                 SUBJECT TO COMPLETION, DATED FEBRUARY 1, 1999
 
PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED OCTOBER 22, 1998)                         February   , 1999
- --------------------------------------------------------------------------------
 
                                  $200,000,000
 
                          [DEL WEBB CORPORATION LOGO]
                     % Senior Subordinated Debentures due 2010
- --------------------------------------------------------------------------------
 
COMPANY
 
+ We are a leading developer of residential communities ranging from
  small-scale, non-amenitized communities within our conventional homebuilding
  operations to large-scale, master-planned communities with extensive
  amenities.
 
DEBENTURES
 
+ Interest on the Debentures will be paid at a fixed rate of      % on
                 and                of each year, starting on                ,
  1999.
 
+ The Debentures mature on                , 2010.
 
+ We will use the net proceeds of this offering to repay part of our outstanding
  indebtedness under our principal credit facility. We currently intend to
  reborrow under that credit facility to fund development of new projects and
  for other general corporate purposes.
 
REDEMPTION AND REPURCHASE
 
+ We may redeem any or all of the Debentures at any time after                ,
  2004 at the redemption prices described herein plus accrued interest.
 
+ If we experience certain changes of control, we must offer to repurchase the
  Debentures.
 
RANKING
 
+ Our obligations on the Debentures will not be secured, will rank junior to our
  senior debt and will rank equally with all of our other current and future
  senior subordinated debt.
 
+ We conduct all of our business through our subsidiaries. The Debentures will
  be effectively subordinated to all existing and future obligations of our
  subsidiaries.
 
LISTING
 
+ We plan to list the Debentures on the New York Stock Exchange.
 
+ There is not now any public market for the Debentures.
 
INVESTING IN THE DEBENTURES INVOLVES RISKS. SEE RISK FACTORS BEGINNING ON PAGE
S-9.
 
<TABLE>
<CAPTION>
                                                       Price to        Discounts and       Proceeds to
                                                      Public(1)       Commissions(2)       Del Webb(3)
- --------------------------------------------------------------------------------------------------------
<S>                                                  <C>             <C>                  <C>
Per Debenture                                                   %                 %                  %
- --------------------------------------------------------------------------------------------------------
Total                                                 $                 $                  $
- --------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Plus accrued interest, if any, from the date of issuance.
 
(2) We have agreed to indemnify the Underwriters against certain liabilities,
    including liabilities under the Securities Act of 1933. See "Underwriting."
 
(3) Before deducting expenses, estimated at $500,000, which we will pay.
 
The Underwriters have agreed to purchase the Debentures on a firm commitment
basis. The sale of the Debentures is scheduled to be completed on             ,
1999. If it takes place after                , 1999, the public price will be
increased to include accrued interest from that date.
 
Neither the Securities Exchange Commission nor any state securities
administrator has approved or disapproved of these securities or determined that
this Prospectus Supplement or the accompanying Prospectus is truthful or
complete. Any representation to the contrary is a criminal offense.
 
WARBURG DILLON READ LLC
                        GOLDMAN, SACHS & CO.
                                           NATIONSBANC MONTGOMERY SECURITIES LLC
<PAGE>   2

                       Photo depicting Model Home Complex
                              Sun City Palm Desert

                       Photo depicting School House Park
                               Sun City Roseville

            Photo depicting Adobe Spa & Fitness Center Outdoor Pool
                                 Sun City Grand


<PAGE>   3
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
 
<S>                                                           <C>
PROSPECTUS SUPPLEMENT
Prospectus Supplement Summary...............................   S-4
Risk Factors................................................   S-9
Use of Proceeds.............................................  S-13
Capitalization..............................................  S-14
Business....................................................  S-15
Description of the Debentures...............................  S-19
Certain Federal Tax Matters.................................  S-40
Underwriting................................................  S-42
Certain Legal Matters.......................................  S-43
 
PROSPECTUS
Available Information.......................................     2
Incorporation of Certain Documents by Reference.............     2
The Company.................................................     3
Use of Proceeds.............................................     3
Consolidated Ratio of Earnings to Fixed Charges.............     3
Description of Debt Securities..............................     4
Description of Warrants.....................................    11
Description of Capital Stock................................    13
Plan of Distribution........................................    14
Certain Legal Matters.......................................    14
Experts.....................................................    14
</TABLE>
 
                                       S-3
<PAGE>   4
 
                         PROSPECTUS SUPPLEMENT SUMMARY
 
     On the cover page, in this summary and in the "Risk Factors" section, the
words "Company," "we," "our," "ours," and "us" refer to Del Webb Corporation and
its subsidiaries, unless the context requires or we state otherwise. The
following summary contains basic information about this Offering. It likely does
not contain all the information that is important to you. For a more complete
understanding of this Offering, we encourage you to read this entire document
and the documents to which we have referred you.
 
     Certain statements in this Prospectus Supplement, the accompanying
Prospectus and the documents we refer you to that are not historical results are
forward looking statements. These forward looking statements involve risks and
uncertainties, including those described under "Risk Factors." Forward looking
statements are based upon assumptions of future events, which may not prove to
be accurate. Actual results may differ materially from those projected or
implied in the forward looking statements. Statements in this Prospectus
Supplement as to acreage, mileage, number of home sites and square feet are
approximations.
 
                                  THE COMPANY
 
     Del Webb Corporation is a leading developer of residential communities
ranging from small-scale, non-amenitized communities within our conventional
homebuilding operations to large-scale, master-planned communities with
extensive amenities. We were the seventh largest builder of single family homes
in the United States in 1997 based on the number of home closings. We operate in
Arizona, California, Florida, Illinois, Nevada, South Carolina and Texas. Our
communities are generally large-scale, master-planned communities at which we
control all phases of the master plan development process, from land selection
through the construction and sale of homes. Within our communities, we are
usually the exclusive developer of homes. Our conventional homebuilding
operations encompass the construction and sale of homes in various locations in
Arizona and Nevada.
 
     During the 12 months ended December 31, 1998 we had revenues of $1.27
billion, with EBIT of $122 million and EBITDA of $444 million (defined in notes
7 and 8 on page S-7). During this period, we had 7,144 net new orders and 6,281
home closings. At December 31, 1998 we had a backlog of 3,518 homes under
contract with an aggregate contract amount of $770 million. On December 31, 1998
we controlled land for which we had primary governmental approvals for more than
59,000 new homes, of which sites for 49,000 homes were owned and the balance
were under option.
 
     In the last six months, we began sales at Anthem Las Vegas, which is
planned for up to 11,678 homes and includes a Sun City active adult community, a
country club community and conventional communities. In addition, we began sales
at our first four-season community, Sun City at Huntley, near Chicago. This
community is planned for 5,574 homes. In the next two months, we expect to begin
sales at our 5,690 home Sun City Lincoln Hills, the successor to Sun City
Roseville near Sacramento, California, and at Anthem Phoenix, a large-scale,
long-term, master-planned project which includes a country club community and an
amenity-rich family-oriented community.
 
                                  THE OFFERING
 
Securities Offered............   $200 million in principal amount of      %
                                 Senior Subordinated Debentures due 2010.
 
Maturity Date.................              , 2010.
 
Interest Payment Dates........                  and                commencing
                                             , 1999. Interest will accrue from
                                 the issue date of the Debentures.
 
Interest Rate.................      % per year.
 
Redemption....................   At our sole option, we may redeem some or all
                                 of the Debentures at any time on or after
                                           , 2004 at the
                                       S-4
<PAGE>   5
 
                                 redemption prices described herein, plus
                                 accrued and unpaid interest to the redemption
                                 date.
 
Ranking.......................   The Debentures will be general unsecured
                                 obligations and will be subordinated in right
                                 of payment to all our existing and future
                                 senior debt, including any amounts outstanding
                                 under our credit facilities. The Debentures
                                 will also be effectively subordinated to all
                                 existing and future obligations of our
                                 subsidiaries, through which we conduct all of
                                 our operations. The Debentures will rank equal
                                 to $550 million in principal amount of our
                                 other outstanding senior subordinated
                                 debentures. The indenture governing the
                                 Debentures (the "Indenture") will provide that
                                 we may not incur certain indebtedness that is
                                 subordinated in right of payment to any of our
                                 senior debt and senior in right of payment to
                                 the Debentures. For more details, see
                                 "Description of the
                                 Debentures -- Subordination."
 
Offers to Purchase............   If certain changes of control occur, we are
                                 required to offer to purchase all outstanding
                                 Debentures at a price equal to 101 percent of
                                 the aggregate principal amount of the
                                 Debentures, plus accrued and unpaid interest to
                                 the date of purchase. We also may be required,
                                 subject to certain conditions and limitations,
                                 to offer to purchase ten percent of the
                                 principal amount of the Debentures initially
                                 issued, at 100 percent of their aggregate
                                 principal amount, plus accrued and unpaid
                                 interest, if our consolidated tangible net
                                 worth (as defined in the Indenture) decreases
                                 to less than $125 million. As of December 31,
                                 1998, our consolidated tangible net worth was
                                 $357.6 million. For more details, see
                                 "Description of the Debentures -- Certain
                                 Covenants -- Change of Control" and
                                 "-- Maintenance of Consolidated Tangible Net
                                 Worth."
 
Certain Covenants.............   The Indenture will contain covenants which,
                                 among other things, restrict our ability to:
 
                                 - incur certain additional debt;
 
                                 - pay dividends or certain other distributions
                                   or acquire our stock; and
 
                                 - enter into certain transactions with
                                   affiliates or merge, consolidate or transfer
                                   substantially all of our assets.
 
                                 The covenants applicable to the Debentures are
                                 substantially similar to those applicable to
                                 our other outstanding senior subordinated
                                 debentures. For more details, see "Description
                                 of the Debentures -- Certain Covenants."
 
Use of Proceeds...............   We intend to use the net proceeds of the sale
                                 of the Debentures to reduce outstanding
                                 indebtedness under our $450 million unsecured
                                 revolving credit facility (the "Credit
                                 Facility"). We intend to reborrow under the
                                 Credit Facility to fund development of new
                                 projects and for other general corporate
                                 purposes.
 
                                       S-5
<PAGE>   6
 
               SUMMARY CONSOLIDATED FINANCIAL AND OPERATING DATA
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                                     SIX MONTHS ENDED
                                                          YEAR ENDED JUNE 30,                          DECEMBER 31,
                                       ----------------------------------------------------------   -------------------
                                         1994       1995        1996         1997         1998        1997       1998
                                       --------   --------   ----------   ----------   ----------   --------   --------
<S>                                    <C>        <C>        <C>          <C>          <C>          <C>        <C>
STATEMENT OF OPERATIONS:
Total revenues.......................  $510,061   $803,119   $1,050,733   $1,186,262   $1,177,767   $526,978   $622,895
Earnings (loss) from continuing
  operations(1)......................    17,021     28,491       (7,751)      39,686       42,533     17,391     21,897
Net earnings (loss)(1)...............    17,021     28,491       (7,751)      38,401       42,533     17,391     21,897
Earnings (loss) per share from
  continuing operations..............      1.15       1.92         (.44)        2.26         2.39        .98       1.21
Earnings (loss) per share from
  continuing operations - assuming
  dilution...........................      1.13       1.87         (.44)        2.22         2.30        .96       1.17
Net earnings (loss) per share........      1.15       1.92         (.44)        2.18         2.39        .98       1.21
Net earnings (loss) per
  share - assuming dilution..........  $   1.13   $   1.87   $     (.44)  $     2.15   $     2.30   $    .96   $   1.17
Ratio of earnings to fixed
  charges(2).........................      1.30x      1.59x          --         2.09x        1.79x      1.84x      1.64x
</TABLE>
 
<TABLE>
<CAPTION>
                                                                             DECEMBER 31, 1998
                                                                          ------------------------
                                                              JUNE 30,                     AS
                                                                1998        ACTUAL     ADJUSTED(3)
                                                             ----------   ----------   -----------
<S>                                                          <C>          <C>          <C>
BALANCE SHEET DATA:
Total assets...............................................  $1,310,462   $1,603,774   $1,609,274
Notes payable, senior and subordinated debt:
  Senior debt and real estate and other notes(4)...........     167,608      371,655      177,155
  Senior Subordinated Debentures, 9 3/4%, due 2003.........      98,081       98,287       98,287
  Senior Subordinated Debentures, 9%, due 2006.............      97,902       98,039       98,039
  Senior Subordinated Debentures, 9 3/4%, due 2008.........     145,370      145,612      145,612
  Senior Subordinated Debentures, 9 3/8%, due 2009.........     194,977      195,180      195,180
  Senior Subordinated Debentures,   %, due 2010............          --           --      200,000
                                                             ----------   ----------   ----------
     Total.................................................  $  703,938   $  908,773   $  914,273
Total shareholders' equity.................................  $  345,767   $  366,991   $  366,991
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                          SIX MONTHS ENDED
                                                             YEAR ENDED JUNE 30,            DECEMBER 31,
                                                        ------------------------------   -------------------
                                                          1996       1997       1998       1997       1998
                                                        --------   --------   --------   --------   --------
<S>                                                     <C>        <C>        <C>        <C>        <C>
OPERATING DATA:
Net new orders(5).....................................     5,850      5,597      6,283      2,504      3,365
Home closings.........................................     5,531      6,206      5,908      2,644      3,017
Homes under contract at period end (backlog)(6).......     3,199      2,590      3,170      2,450      3,518
Dollar amount of backlog (in millions)(6).............  $    617   $    514   $    642   $    506   $    770
Average revenue per home closing (in thousands).......  $    183   $    184   $    189   $    188   $    195
Home construction, land and other costs as a
  percentage of revenues..............................      76.9%      77.0%      76.3%      76.3%      76.2%
Interest as a percentage of revenues..................       4.0        4.2        3.9        4.2        4.1
Selling, general and administrative expenses as a
  percentage of revenues..............................      14.0       13.6       14.1       14.4       14.2
EBIT(7)...............................................  $ 94,413   $109,956   $111,598   $ 48,617   $ 59,109
EBITDA(8).............................................   350,887    385,187    391,496    167,238    219,541
Total property and equipment and development
  expenditures........................................   382,113    334,281    403,625    152,101    428,112
Interest incurred(9)..................................    52,022     51,917     61,546     26,003     35,593
EBITDA/interest incurred..............................      6.74x      7.42x      6.36x      6.43x      6.17x
</TABLE>
 
                                       S-6
<PAGE>   7
 
- ---------------
(1) In fiscal 1996, in connection with the adoption of Statement of Financial
    Accounting Standards ("SFAS") No. 121, we incurred a non-cash loss from
    impairment of southern California real estate inventories in the amount of
    $65.0 million pre-tax ($42.3 million after tax) related to the valuation of
    our Sun City Palm Desert active adult community. Exclusive of the non-cash
    loss, our net earnings for fiscal 1996 were $34.5 million ($2.01 per share
    or $1.96 per share - assuming dilution).
 
    Net earnings for fiscal 1997 include a $1.3 million extraordinary loss, net
    of tax, from the early extinguishment of debt.
 
(2) The ratio of earnings to fixed charges is calculated by dividing earnings by
    fixed charges. For this purpose, "earnings" means earnings from continuing
    operations before income taxes plus (a) fixed charges and interest
    amortization minus (b) interest incurred. "Fixed charges" means total
    interest whether capitalized or expensed (including the portion of rent
    expense representative of interest costs), plus debt-related fees and
    amortization of deferred financing costs. Earnings in fiscal 1996 were
    inadequate to cover fixed charges by $21.6 million due to the $65.0 million
    non-cash loss from impairment of southern California real estate inventories
    incurred in connection with our adoption of SFAS No. 121. See note 1 above
    and Note 12 to our Consolidated Financial Statements included in our Annual
    Report on Form 10-K for the fiscal year ended June 30, 1996.
 
(3) The information shown is adjusted for the sale of the Debentures and the
    anticipated use of the estimated net proceeds therefrom. The net proceeds
    are anticipated to be used to repay a portion of the indebtedness
    outstanding under the Credit Facility. See "Use of Proceeds."
 
(4) At December 31, 1998, $33.2 million of senior debt and real estate and other
    notes was subsidiary debt.
 
(5) Net new orders are reduced by cancellations. We recognize revenues at close
    of escrow.
 
(6) A majority of the backlog at December 31, 1998 is currently anticipated to
    result in revenues in the 12 months ending December 31, 1999. However, a
    majority of the backlog is contingent primarily upon the availability of
    financing for the customer and, in certain cases, sale of the customer's
    existing residence or other factors. Also, as a practical matter, our
    ability to obtain damages for breach of contract by a potential home buyer
    is limited to retaining all or a portion of the deposit received. In the
    years ended June 30, 1996, 1997 and 1998 and the six months ended December
    31, 1997 and 1998, cancellations of home sales orders as a percentage of new
    home sales orders written during the period were 17.2%, 17.1%, 13.9%, 14.7%
    and 14.7%, respectively.
 
(7) "EBIT" means earnings from continuing operations before (i) interest, (ii)
    income taxes and (iii) non-cash loss from impairment of southern California
    real estate inventories. For this purpose, "interest" means interest
    amortization less interest income.
 
(8) "EBITDA" means earnings from continuing operations before (i) interest, (ii)
    income taxes, (iii) non-cash loss from impairment of southern California
    real estate inventories, (iv) allocation of non-cash common costs (excluding
    interest amortization) and (v) depreciation and other amortization. See note
    7 above for the definition of "interest" as used here.
 
(9) "Interest incurred" means total interest, whether capitalized or expensed,
    on debt plus debt-related fees and amortization of deferred financing costs.
 
                                       S-7
<PAGE>   8
 
                              RECENT DEVELOPMENTS
 
RESULTS OF OPERATIONS -- SIX MONTHS ENDED DECEMBER 31, 1998
 
     Revenues increased to $622.9 million for the six months ended December 31,
1998 from $527.0 million for the six months ended December 31, 1997. This
increase was largely due to Sun City Palm Desert and Sun City Roseville, which
respectively closed 117 and 80 more homes in the 1998 period than in the 1997
period. We believe that these increases are largely attributable to improvement
in California's real estate economy and its economy generally. Our Florida
communities and smaller-scale communities in Arizona and California, none of
which had home closings in the 1997 period, also contributed to the increase in
revenues. An increase in the average revenue per home closing resulted in $18.7
million of the increase in revenues.
 
     The increase in net earnings to $21.9 million for the 1998 period compared
to $17.4 million for the 1997 period was primarily attributable to the increase
in home closings and homebuilding gross margins. Homebuilding margins improved
primarily as a result of increased revenue per home closing at virtually all of
our communities.
 
     Net new orders in the 1998 period were 34.4 percent higher than in the 1997
period. The number of homes under contract at December 31, 1998 was 43.6 percent
higher than at December 31, 1997. Both of these increases were primarily
attributable to Anthem Country Club near Las Vegas, conventional subdivision
communities at Anthem near Las Vegas, Sun City at Huntley and the Florida
communities. These communities had new order activity for all of the 1998 period
but had not yet commenced new order activity in the 1997 period.
 
NEW COMMUNITY DEVELOPMENTS
 
     Our strategy is to continue master-planned community development and
conventional homebuilding operations in geographic areas in which we have been
successful. As described below, we are currently developing several successor
communities in key markets as well as several new communities.
 
     Sun City Lincoln Hills.  Sun City Lincoln Hills, near Sacramento, is
located close to and is planned as the successor to Sun City Roseville. Sun City
Lincoln Hills is located on 2,300 acres and is planned for 5,690 homes. We broke
ground at this community in April 1998 and are scheduled to begin sales
activities in February 1999 and home closings in the first quarter of fiscal
2000.
 
     Anthem Las Vegas.  Anthem Las Vegas includes an active adult community, Sun
City Anthem, planned as the successor to Sun City Summerlin. Sun City Anthem is
planned for 9,300 homes to be located on 3,650 acres.
 
     In addition to Sun City Anthem, Anthem Las Vegas includes a country club
community. Anthem Country Club is planned for 1,206 homes on 950 acres. Anthem
Las Vegas also includes conventional communities, currently planned for 1,172
homes on 300 acres.
 
     We broke ground at Anthem Las Vegas in November 1997, began sales
activities in July 1998 and began home closings in late December 1998.
 
     The entire Anthem Las Vegas project is planned for a total of 4,900 acres.
The 2,500 acres which we own for Anthem Las Vegas were acquired through a land
exchange with the Bureau of Land Management ("BLM"). We continue to work toward
completion of an exchange with the BLM for the remaining acres, substantially
all of which will be used for Sun City Anthem.
 
     Anthem Phoenix.  Anthem Phoenix, located near Phoenix, is planned to
include a country club community and conventional communities. Anthem Phoenix is
located on 5,851 acres. We have received the primary governmental approvals for
up to 14,500 homes. We began offsite development in November 1997, are scheduled
to begin sales activities in March 1999 and anticipate the first home closings
in the first quarter of fiscal 2000.
 
     Sun City at Huntley.  Sun City at Huntley is located on 2,000 acres in
Huntley, Illinois (near Chicago) and is planned for 5,574 homes. We broke ground
at this community in April 1998, began sales activities in September 1998 and
have scheduled the first home closings for April 1999.
 
                                       S-8
<PAGE>   9
 
                                  RISK FACTORS
 
     You should read carefully this entire Prospectus Supplement, the
accompanying Prospectus and the documents to which we refer you before investing
in the Debentures. Among the factors that may adversely affect an investment in
the Debentures are the following.
 
OUR SUBSTANTIAL INDEBTEDNESS AND HIGH LEVERAGE COULD ADVERSELY AFFECT US.
 
     After this Offering we expect to be considerably more highly leveraged than
we have been in recent years. The Credit Facility and the indentures governing
our outstanding debentures restrict the indebtedness we may incur. As a result,
we expect that a significant portion of the unborrowed amounts under our credit
facilities will not be available after we repay a portion of the amount owed
with the net proceeds of the sale of these Debentures. We nevertheless expect to
have adequate capital resources to meet our needs for the next 12 months.
However, if there is a significant downturn in our anticipated operations and
other capital resources are not obtained, we will need to modify our business
plan to operate with lower capital resources. Modifications of the business plan
could include, among other things, delaying development expenditures at our
communities. Such actions, if implemented, could have a material adverse effect
on our operations.
 
     Real estate development is dependent on the availability and cost of
financing. In periods of significant growth, we will require significant
additional capital resources, whether from issuances of equity or by increasing
our indebtedness. The availability and cost of debt financing depends on
governmental policies and other factors outside our control.
 
     Our degree of leverage from time to time will affect our interest incurred
and capital resources, which could limit our ability to capitalize on business
opportunities or withstand adverse changes. If we cannot at any time obtain
sufficient capital resources to fund our development and expansion expenditures,
our projects may be delayed, resulting in cost increases, adverse effects on our
results of operations and possible material adverse effects on us. No assurance
can be given as to the terms, availability or cost of any future financing we
may need. If we are at any time unable to service our debt, refinancing or
obtaining additional financing may be required and may not be available or
available on terms acceptable to us.
 
COMMUNITIES TAKE SEVERAL YEARS TO REALIZE POSITIVE RETURNS, AND RISKS ARE
INVOLVED WHEN
DEVELOPING NEW TYPES OF COMMUNITIES AND COMMUNITIES IN NEW GEOGRAPHIC LOCATIONS.
 
     Our communities will be built out over time. Therefore, our medium- and
long-term success will depend on our ability to successfully develop and market
future communities. Acquiring land and committing the financial and managerial
resources to develop a large-scale community on that land involve significant
risks. Before these communities generate any revenues, we must make material
expenditures for, among other things, acquiring large tracts of land, obtaining
development approvals, developing land and lots and constructing project
infrastructure (such as roads and utilities), large recreation centers, golf
courses, model homes and sales facilities. It generally takes us several years
or more to recover these material expenditures.
 
     We incur additional risks to the extent we develop communities in climates
or geographic areas in which we do not have experience or develop a different
size or style of community, including acquiring the necessary construction
materials and labor in sufficient amounts and on acceptable terms, adapting our
construction methods to different geographies and climates and reaching
acceptable sales levels at such communities. Among other things, we believe that
a significant portion of the home sales at our large-scale active adult
communities is attributable to referrals from, or sales to, residents of those
communities. The extent of referrals or sales at new communities, including
communities developed in other areas of the country, may be less than we have
enjoyed at the large-scale active adult communities where we currently sell
homes, and there will be challenges attracting potential customers from areas
and to a market in which we have not had significant experience.
 
                                       S-9
<PAGE>   10
 
GOVERNMENTAL REGULATIONS AND ENVIRONMENTAL CONSIDERATIONS COULD NEGATIVELY
AFFECT US.
 
     Our business is subject to extensive federal, state and local regulatory
requirements. These include, with respect to development activities and land
exchanges, the broad discretion that governmental agencies have in administering
those requirements and "no growth" or "slow growth" political sentiments, which
have been increasing in recent years. All of these requirements can prevent,
delay, make uneconomic or significantly increase the cost of our developments.
Environmental concerns and related governmental requirements have affected and
will continue to affect all of our community development operations.
 
     If the balance of the land exchange for Anthem Las Vegas is not completed,
that project would have to be reduced in scope and reconfigured, which could
affect the timing and potential profitability of the project. We may then have
to dispose of property we acquired for the exchange at a price below our
purchase price.
 
     In connection with the development of our communities and other real estate
projects, particularly those located in California, numerous governmental
approvals and permits are required throughout the development process. We can
give you no assurance that we will receive, or receive in a timely manner, any
of these approvals or permits. In addition, third parties can file lawsuits
challenging approvals or permits we receive, which could cause substantial
uncertainties and material delays for the project and, if successful, could
result in approvals or permits being voided.
 
     Should any of these situations occur, it could have a material adverse
effect on us.
 
SIGNIFICANT COMPETITION EXISTS IN OUR INDUSTRY.
 
     All of our real estate operations are subject to substantial competition.
We compete with numerous national, regional and local homebuilders and
developers, some of which have greater financial resources than we do.
 
     With the exception of our Florida communities, we believe that we maintain
a leading position within the active adult community market in each metropolitan
area in which we have an active adult community currently generating revenues.
Each of our active adult communities has a varying degree of direct and
increasing competition from businesses exclusively or primarily selling homes to
buyers age 55 and older, as well as from non-age-qualified, master-planned
communities in these areas. We compete with new home sales and resales at these
other communities, as well as with resales of homes in our own communities. We
believe there may be significant additional future competition in active adult
community development, including competition from national homebuilders and
conventional community developers.
 
     We believe the major competitive factors in active adult community home
purchases include location, lifestyle, price, value, recreational facilities and
other amenities and builder/developer reputation. We believe that the major
competitive factors in the conventional homebuilding part of our business
include location, home quality, price, value, design and mortgage financing
terms.
 
OUR BUSINESS IS GEOGRAPHICALLY CONCENTRATED.
 
     Our business operations are particularly concentrated, in terms of both
invested capital and profitability, in the Phoenix and Las Vegas metropolitan
areas. Our entire operations are comprised of a limited number of communities in
seven states. Our geographic concentration and limited number of projects may
create increased vulnerability to regional economic downturns or other adverse
project-specific matters.
 
     A significant number of purchasers at our active adult communities in
Arizona, Nevada and southern California are from southern California. Those
communities have been and may in the future be affected by conditions in the
southern California real estate market and the southern California economy
generally.
 
                                      S-10
<PAGE>   11
 
FLUCTUATIONS DUE TO THE CYCLICAL NATURE OF THE REAL ESTATE MARKET
AND INCREASES IN INTEREST RATES COULD NEGATIVELY AFFECT US.
 
     All of our communities are subject to fluctuations in the real estate
market, both where our communities are located and in areas where our potential
customers reside, as well as the cyclical nature of real estate operations,
general economic conditions and changing demographics.
 
     Our communities are long-term projects. Sales activity at our communities
varies from period to period, and the ultimate success of any community cannot
necessarily be judged by results in any particular period or periods. A
community may generate significantly higher sales levels at inception, whether
because of local pent-up demand in the area or other reasons, than in later
periods over the life of the community. Our revenues and earnings will also be
affected by periodic fluctuations in the mix of product and home closings among
our communities and conventional homebuilding operations and by sales of
commercial land and facilities at our communities.
 
     There are risks associated with our having capital invested in completed
homes and homes under construction for which we do not have sales contracts.
 
     Our real estate operations also depend upon the availability and cost of
mortgage financing. An increase in interest rates, which may result from
governmental policies and other factors outside our control, may adversely
affect the buying decisions of potential home buyers and their ability to sell
their existing homes.
 
FLUCTUATING MATERIAL AND LABOR COSTS AND THE USE OF SUBCONTRACTORS CAN CAUSE
DELIVERY DELAYS, INCREASED UNIT COSTS AND LOSS OF HOME SALE CONTRACTS.
 
     We have from time to time experienced shortages of materials or qualified
tradespeople and volatile increases in the cost of certain materials,
particularly increases in the price of lumber and framing, which are significant
components of home construction costs. This has caused longer than normal
construction periods and increased costs that were not reflected in the prices
of homes for which home sale contracts had been entered into up to one year in
advance of scheduled closing. Generally, our home sale contracts do not contain,
or contain limited, provisions for price increases if our costs of construction
increase.
 
     We rely heavily on local contractors, who may be inadequately capitalized
or understaffed. The inability or failure of one or more local contractors to
perform may cause construction delays, increased costs and the loss of some home
sale contracts.
 
WE FACE CERTAIN NATURAL RISKS.
 
     Some of our communities are subject to natural risks including earthquakes,
floods, tornadoes, hurricanes and significant rainfall. Some of these conditions
have had a significant impact on our operations in the past. Any natural
disaster could have a material adverse impact on our results of operations in
the future.
 
THERE ARE RISKS RELATING TO THE "YEAR 2000" ISSUE.
 
     We expect to incur Year 2000-related costs in the next 12 months, but do
not at present anticipate that these costs will be material. We believe that the
most reasonably likely worst-case scenario for the Year 2000 issue would occur
if we, or the third parties with whom we have relationships, were to cease or
not successfully complete Year 2000 remediation efforts. If this were to occur,
we would encounter disruptions to our business that could have a material
adverse effect on our results of operations. We could be materially impacted by
widespread economic or financial market disruption or by Year 2000 computer
system failures at government agencies on which we are dependent for zoning,
building permits and related matters.
 
                                      S-11
<PAGE>   12
 
YOUR RIGHT TO RECEIVE PAYMENTS IS JUNIOR TO CERTAIN OTHER EXISTING AND FUTURE
INDEBTEDNESS.
 
     The Debentures will be subordinate and junior in right of payment to all
our senior debt. At December 31, 1998, after giving effect to the sale of the
Debentures and the anticipated use of the net proceeds, our senior debt, which
does not include any subsidiary indebtedness, would have been $165.9 million,
including $21.9 million of guarantees and letters of credit. Since we conduct
all of our operations through subsidiaries, the Debentures will be effectively
subordinated to all existing and future obligations of our subsidiaries, even
though subsidiary obligations do not constitute senior debt. At December 31,
1998 our subsidiaries had $33.2 million of indebtedness.
 
     Because of the subordination of the Debentures, in the event of any payment
or distribution of the our assets in any dissolution, insolvency, bankruptcy or
other similar proceeding, holders of senior debt must be paid in full before the
holders and beneficial owners of Debentures may be paid, and amounts otherwise
payable to the holders of Debentures will be paid to the holders of senior debt
until the senior debt is paid in full. By reason of this subordination, in the
event of our dissolution, insolvency or bankruptcy, holders and beneficial
owners of the Debentures may recover less, ratably, than holders of senior debt
and other creditors, or may recover nothing. In addition, we are required to
stop making payments of principal and interest on the Debentures if there is a
continuing default with respect to any senior debt that would permit the holders
of such senior debt to accelerate payment, and the trustee under the indenture
receives notice of the default from a holder of such senior debt entitled to
give that notice.
 
YOU CANNOT BE SURE THAT AN ACTIVE TRADING MARKET WILL DEVELOP FOR THESE
DEBENTURES.
 
     Although we will apply to have the Debentures approved for listing on the
New York Stock Exchange, they are a new issue of securities, have no established
trading market and may not be widely distributed. Accordingly, we can give you
no assurance as to the liquidity of, or trading market for, the Debentures, and
no assurance can be given that the Debentures will not trade below their face
amount.
 
                                      S-12
<PAGE>   13
 
                                USE OF PROCEEDS
 
     The net proceeds of the Offering, estimated at approximately $194.5
million, will be used to repay a portion of the indebtedness outstanding under
the Credit Facility. At December 31, 1998, $307.0 million of borrowings, bearing
a weighted average interest rate of 7.09 percent per year, were outstanding
under the Credit Facility. See "Capitalization." These borrowings were incurred
to fund development of existing and new projects and for other general corporate
purposes or to refinance indebtedness incurred for those purposes.
 
     The Company currently intends to reborrow under the Credit Facility to fund
development of new projects and for other general corporate purposes. Assuming
repayment of a portion of the Credit Facility with the estimated net proceeds of
the Offering, as of December 31, 1998, approximately $139.8 million of the $450
million Credit Facility and $25 million short-term lines of credit would not
have been available as a result of restrictions in the Credit Facility.
 
                                      S-13
<PAGE>   14
 
                                 CAPITALIZATION
 
     The following table sets forth the consolidated capitalization of the
Company at December 31, 1998 and as adjusted to give effect to the sale of the
Debentures and the use of the estimated net proceeds therefrom.
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31, 1998
                                                              ----------------------------
                                                                ACTUAL      AS ADJUSTED(1)
                                                              ----------    --------------
                                                                     (IN THOUSANDS)
<S>                                                           <C>           <C>
Debt(2):
  Senior debt and real estate and other notes(3)............  $  371,655      $  177,155
  Senior Subordinated Debentures, 9 3/4%, due 2003..........      98,287          98,287
  Senior Subordinated Debentures, 9%, due 2006..............      98,039          98,039
  Senior Subordinated Debentures, 9 3/4%, due 2008..........     145,612         145,612
  Senior Subordinated Debentures, 9 3/8%, due 2009..........     195,180         195,180
  Senior Subordinated Debentures,   %, due 2010.............          --         200,000
                                                              ----------      ----------
          Total debt........................................     908,773         914,273
                                                              ----------      ----------
Shareholders' equity:
  Common stock and additional paid-in capital...............     168,845         168,845
  Retained earnings.........................................     205,882         205,882
  Deferred compensation.....................................      (7,736)         (7,736)
                                                              ----------      ----------
          Total shareholders' equity........................  $  366,991      $  366,991
                                                              ----------      ----------
          Total capitalization..............................  $1,275,764      $1,281,264
                                                              ==========      ==========
</TABLE>
 
- ---------------
(1) The net proceeds of the Offering will be used to repay a portion of the
    indebtedness outstanding under the Credit Facility. See "Use of Proceeds."
 
(2) See Note 6 to the Company's Consolidated Financial Statements included in
    its Annual Report on Form 10-K for the year ended June 30, 1998 and Note 3
    to the Company's Consolidated Financial Statements included in its Quarterly
    Report on Form 10-Q for the quarter ended December 31, 1998, which are
    incorporated by reference in the accompanying Prospectus, for information
    regarding outstanding indebtedness.
 
(3) Of this senior debt and real estate and other notes, $33.2 million is
    subsidiary debt.
 
                                      S-14
<PAGE>   15
 
                                    BUSINESS
 
     Del Webb Corporation develops residential communities ranging from
small-scale, non-amenitized communities within its conventional homebuilding
operations to large-scale, master-planned communities with extensive amenities.
The Company currently conducts its operations in Arizona, California, Florida,
Illinois, Nevada, South Carolina and Texas.
 
     The Company's primary activities involve the development of large-scale,
master-planned communities with extensive amenities for active adults age 55 and
over. The Company is one of the nation's leading developers of age-qualified
active adult communities. It has extensive experience in the active adult
community business, having built and sold more than 60,000 homes at ten Sun City
communities over the past 38 years. The Company designs, develops and markets
these communities, controlling all phases of the master plan development process
from land selection through the construction and sale of homes. Within its
communities, the Company is usually the exclusive developer of homes.
 
COMMUNITIES
 
     The following table shows, at December 31, 1998, certain information
concerning the operating and pre-operating communities at which the Company has
planned home sites, substantially all of which are controlled by the Company.
 
<TABLE>
<CAPTION>
                                                                                 REMAINING HOME SITES(1)
                                                                      HOME     ---------------------------
                                        FIRST              TOTAL    CLOSINGS                       UNDER
                                        HOME     TOTAL     HOME     THROUGH                        OPTION
                                       CLOSING   ACRES     SITES    12/31/98    TOTAL    OWNED    OR OTHER
                                       -------   ------   -------   --------   -------   ------   --------
<S>                                    <C>       <C>      <C>       <C>        <C>       <C>      <C>
Operating Communities:
  Sun Cities Phoenix.................   1978     10,859    26,078    18,165     7,913     7,913        --
  Sun Cities Las Vegas...............   1989      3,064    10,293     8,859     1,434     1,434        --
  Sun City Palm Desert...............   1992      1,184     3,375     1,923     1,452     1,452        --
  Sun City Roseville.................   1995      1,200     3,110     2,664       446       446        --
  Sun City Hilton Head...............   1995      5,600     8,500     1,229     7,271     2,980     4,291
  Sun City Georgetown................   1996      5,636    10,500     1,483     9,017     8,235       782
  Florida communities................   1996      1,988     3,722       711     3,011     2,211       800
  Other communities..................   1998        420     1,351       167     1,184     1,009       175
  Coventry Homes(2)..................   1991        N/A     9,008     6,600     2,408     2,326        82
                                                          -------    ------    ------    ------    ------
     Total Operating Communities.....                      75,937    41,801    34,136    28,006     6,130
                                                          -------    ------    ------    ------    ------
New Communities:
  Sun City Lincoln Hills.............    N/A      2,300     5,690        --     5,690     1,600     4,090
  Anthem Las Vegas(3)................   1998      4,900    11,678        10    11,668     4,868     6,800
  Anthem Phoenix(4)..................    N/A      5,851    14,500        --    14,500    14,500        --
  Sun City at Huntley................    N/A      2,000     5,574        --     5,574     5,163       411
                                                          -------    ------    ------    ------    ------
     Total New Communities...........                      37,442        10    37,432    26,131    11,301
                                                          -------    ------    ------    ------    ------
     Total...........................                     113,379    41,811    71,568    54,137    17,431
                                                          =======    ======    ======    ======    ======
</TABLE>
 
- ---------------
(1) Material additional regulatory approvals are required to build on many of
    these home sites.
 
(2) The Company's conventional subdivision operations.
 
(3) The Company owns 2,500 of the 4,900 acres for Anthem Las Vegas and is
    working toward completion of a land exchange with the BLM for the remaining
    acreage.
 
(4) The Company expects a long build-out for Anthem Phoenix. The number of home
    sites developed could vary significantly depending on market and other
    conditions over the life of the project. No assurance can be given as to the
    actual number of home sites to be developed.
 
                                      S-15
<PAGE>   16
 
  Operating Communities
 
     The Sun Cities Phoenix include Sun City West and Sun City Grand. These
communities are located 25 miles northwest of downtown Phoenix, Arizona. The
build-out of Sun City West has been coordinated with the development of Sun City
Grand, where home closings began in February 1997.
 
     The Sun Cities Las Vegas include Sun City Summerlin and Sun City MacDonald
Ranch. Sun City Summerlin is located eight miles northwest of downtown Las
Vegas, Nevada. Sun City MacDonald Ranch is located in Henderson, Nevada, near
Las Vegas.
 
     Sun City Palm Desert is located in the Coachella Valley 20 miles east of
Palm Springs, California, and 130 miles east of downtown Los Angeles.
Information in the above table is for phase one and part of phase two of that
community. The Company also owns 400 adjacent acres for the balance of the
second phase of development at Sun City Palm Desert. If developed, the balance
of phase two is currently planned for 1,300 homes.
 
     Sun City Roseville is located 20 miles northeast of downtown Sacramento,
California.
 
     Sun City Hilton Head is located inland 13 miles from Hilton Head Island,
South Carolina.
 
     Sun City Georgetown is located 30 miles north of downtown Austin, Texas.
 
     The Florida communities consist of two communities -- the Spruce Creek
communities -- located near Ocala, Florida. In January 1998 the Company entered
the active adult community business in Florida by acquiring these two
communities.
 
     The other communities represent two smaller-scale, age-qualified
communities in Arizona and California at which net new order activity and home
closings began in fiscal 1998.
 
     Development of future phases at the Company's communities is dependent on,
among other factors, the state of the economy and prospects for the community in
question at the time the current phases near completion.
 
  New Communities
 
     The Company's strategy is to continue master-planned community development
and conventional homebuilding operations in geographic areas in which it has
been successful. As described below, the Company is currently developing several
successor communities in key markets as well as several new communities.
 
     Sun City Lincoln Hills.  Sun City Lincoln Hills, near Sacramento, is
located close to and is planned as the successor to Sun City Roseville. Sun City
Lincoln Hills is located on 2,300 acres and is planned for 5,690 homes. The
Company broke ground at this community in April 1998 and is scheduled to begin
sales activities in February 1999 and home closings in the first quarter of
fiscal 2000.
 
     Anthem Las Vegas.  Anthem Las Vegas includes an active adult community, Sun
City Anthem, planned as the successor to Sun City Summerlin. Sun City Anthem is
planned for 9,300 homes to be located on 3,650 acres.
 
     In addition to Sun City Anthem, Anthem Las Vegas includes a country club
community. Anthem Country Club is planned for 1,206 homes on 950 acres. Anthem
Las Vegas also includes conventional communities, currently planned for 1,172
homes on 300 acres.
 
     The Company broke ground at Anthem Las Vegas in November 1997, began sales
activities in July 1998 and began home closings in late December 1998.
 
     The entire Anthem Las Vegas project is planned for a total of 4,900 acres.
The 2,500 acres which the Company owns for Anthem Las Vegas were acquired
through a land exchange with the BLM. The Company continues to work toward
completion of an exchange with the BLM for the remaining acres, substantially
all of which will be used for Sun City Anthem.
 
                                      S-16
<PAGE>   17
 
     Anthem Phoenix.  Anthem Phoenix, located near Phoenix, is planned to
include a country club community and conventional communities. Anthem Phoenix is
located on 5,851 acres. The Company has received the primary governmental
approvals for up to 14,500 homes. The Company began offsite development in
November 1997, is scheduled to begin sales activities late this year and
anticipates the first home closings in the first quarter of fiscal 2000.
 
  Future Communities
 
     The Company believes that the demographic attributes of its active adult
market segment of people age 55 and over present significant opportunities for
future active adult communities. The Company's plan is to capitalize on those
opportunities and its experience, expertise and reputation by developing active
adult communities in strategically selected locations. The current business
strategy of the Company includes conducting extensive market research on
prospective areas, including consumer surveys and supply and demand analyses, in
connection with its evaluation of sites for future active adult communities. To
the extent the Company has had a successful community in an area, the Company
generally strives to maintain a market presence in that area through development
of a successor community as the former community approaches build-out.
 
     At any given time, the Company may have a number of land acquisitions for
potential communities under study and in various stages of investigation or
negotiation. The Company is currently investigating the acquisition of land for
communities to be located both in areas of the country where the Company has
active adult communities and in other areas, including full four-season areas
(i.e., areas which experience cold winters), where it does not yet have
extensive experience in developing communities.
 
     In making significant land acquisitions, the Company generally endeavors to
acquire options on the land to mitigate risks and reduce holding costs during
the detailed feasibility and entitlement process. However, under certain
circumstances, the Company may acquire land at an earlier stage in the
development process.
 
  Conventional Subdivision Communities
 
     The Company began its conventional subdivision homebuilding operations
(conducted under the name "Coventry Homes") in the Phoenix area in 1991 and
expanded these operations to Tucson in 1994, Las Vegas and southern California
in 1995 and north-central Arizona in 1996. At December 31, 1998 the Company had
a backlog of home sales orders at 27 communities -- 17 in the Phoenix area, four
in the Tucson area, five in the Las Vegas area and one in north-central Arizona.
The Company terminated its conventional homebuilding operations in southern
California in fiscal 1998 and expects to terminate its conventional homebuilding
operations in Tucson by the end of fiscal 1999. For the fiscal year ended June
30, 1998 conventional homebuilding operations generated 21 percent of the
Company's homebuilding revenues. The Company currently expects that active adult
community development will continue to be the dominant component of its primary
business activity.
 
PRODUCT DESIGN
 
     The Company designs homes to suit its market and respect popular home
design characteristics in the particular geographic market involved. Home
designs are periodically reviewed and refined or changed in response to customer
feedback in each market. Homes at the Company's communities generally range in
size from 1,000 square feet to 3,000 square feet. The Company offers an
extensive program of interior/exterior upgrades and options to allow home buyers
the ability to customize their homes.
 
CONSTRUCTION
 
     The Company generally functions as its own general contractor. At all
stages of production, the Company's management personnel and on-site
superintendents coordinate the activities of contractors, consultants and
suppliers and subject their work to quality and cost controls. Consulting firms
assist in project planning and independent contractors are employed to perform
almost all of the site development and construction work. The Company does not
generally sell vacant lots to others for residential construction
                                      S-17
<PAGE>   18
 
purposes. The time required for construction of the Company's homes depends on
the weather, time of year, local labor situations, availability of materials and
supplies and other factors. The Company strives to coordinate the construction
of homes with home sales orders to control the costs and risks associated with
completed but unsold inventory. An inventory of unsold homes is maintained for
immediate sale to customers.
 
SALES ACTIVITIES
 
     At each of its large-scale, master-planned communities the Company
establishes a large and well-appointed sales pavilion and an extensive complex
of furnished model homes. These models include a wide variety of single family
homes, each of which is generally available in several exterior styles.
 
     The Company's homes are sold by its commissioned sales personnel, who are
available to provide prospective home buyers with floor plans, price
information, option selections and tours of models and lots. The communities
also have co-brokerage programs with independent real estate brokers. Homes are
sold through sales contracts, some of which allow customers to purchase homes
for delivery up to one year or more in the future. The sales contracts generally
require an initial deposit and an additional deposit prior to commencement of
construction. The Company provides to all home buyers standardized warranties
subject to specified limitations.
 
     While more than one factor may contribute to a given home sale, the
Company's experience indicates that a substantial portion of the home sales at
its active adult communities are attributable to follow-ups on referrals from
residents of its communities and to the Company's "Vacation Getaway" program.
This program enables prospective purchasers to visit an active adult community
and stay (for a modest charge) in vacation homes for a few days to one week to
experience the Sun City lifestyle prior to deciding whether to purchase a home.
 
     The Company's information indicates that most home buyers at its active
adult communities generally visit the community in which they purchase on more
than one occasion before buying. This may affect the success of the sales effort
at those communities at which a higher proportion of the potential customers do
not live within a several-hour driving distance from the community.
 
     The Company also markets its communities through billboards, television and
radio commercials, local and national print advertising, direct mailings and
telemarketing.
 
     The Company offers mortgage financing for the purchasers of homes at its
communities. The Company sells the mortgages it generates to third parties.
 
                                      S-18
<PAGE>   19
 
                         DESCRIPTION OF THE DEBENTURES
 
     This description of the terms of the Debentures supplements and, to the
extent inconsistent therewith, modifies the description of the general terms and
provisions of the debt securities set forth in the accompanying Prospectus, to
which reference is hereby made.
 
     The following description of certain terms of the Debentures does not
purport to be complete and is qualified in its entirety by reference to the
Indenture pursuant to which the Debentures will be issued, a copy of the
proposed form of which will be filed as an exhibit to a Current Report on Form
8-K, and to those terms made part of the Indenture by reference to the Trust
Indenture Act of 1939, as amended (the "Trust Indenture Act"). Terms (whether or
not capitalized) used but not defined herein have the meanings given to them in
the Indenture.
 
     As used below in this "Description of the Debentures" section, the
"Company" means Del Webb Corporation, but not any of its subsidiaries, unless
the context requires otherwise.
 
GENERAL
 
     The Debentures will be general unsecured senior subordinated obligations of
the Company and will be issued under an Indenture between the Company and Bank
of Montreal Trust Company (the "Trustee"). The Debentures will be limited to an
aggregate principal amount of $200 million and will mature on             ,
2010. The Debentures will bear interest at the rate shown on the cover page of
this Prospectus Supplement, payable on             and             of each year,
commencing on             , 1999, to holders of record (the "Holders") at the
close of business on             or             , as the case may be,
immediately preceding the respective interest payment date.
 
     The Debentures will rank pari passu with the $550 million aggregate
principal amount of the Company's outstanding senior subordinated debentures
(collectively, the "Outstanding Debentures") and the covenants applicable to the
Debentures are substantially similar to those applicable to the Outstanding
Debentures.
 
     The Debentures will be subordinated and junior in right of payment, to the
extent and in the manner set forth below, to all Senior Debt. The Company is a
holding company, which currently conducts its operations through subsidiaries.
This effectively subordinates the Debentures to all indebtedness (including
trade payables) of the Company's subsidiaries. Therefore, the Company's rights
and the rights of its creditors, including holders of Debentures, to participate
in the assets of any subsidiary of the Company upon the subsidiary's liquidation
or recapitalization will be subject to the prior claims of the subsidiary's
creditors, except to the extent that the Company may itself be a creditor with
recognized claims against the subsidiary. However, in that case the claims of
the Company would still be effectively junior to any indebtedness of the
subsidiaries to the extent the creditors are entitled to the benefit of security
interests in the assets of the subsidiary as well as to any indebtedness of the
subsidiary senior to that held by the Company. In addition, because the Company
is a holding company, it is dependent on dividends or other distributions from
its subsidiaries to make payments on its indebtedness, including the Debentures.
Such dividends or other distributions to the Company may be subject to state
law, which can restrict the ability of a corporation to pay dividends or make
other distributions to its shareholders and which protect the rights of
creditors of a corporation in the event of improperly made dividends or
distributions, as well as to present or future contractual or regulatory
restrictions that could materially restrict the subsidiaries' ability to make
such payments to the Company. The Indenture will restrict, but not prohibit, the
Company's ability to enter into contracts in the future that limit the ability
of the Company's subsidiaries to make dividends, loans or advances to it.
Payments to the Company from its subsidiaries also are contingent upon the
earnings of such subsidiaries and are subject to various business
considerations, such as the working capital needs of the subsidiaries. See "Risk
Factors -- Your right to receive payments is junior to certain other existing
and future indebtedness."
 
     Except under limited circumstances, the Debentures will be issued in full
registered book-entry form without coupons in denominations of $1,000 and
integral multiples thereof. Beneficial owners of interests in the Global
Debentures, including the Global Debentures held by DTC or its nominees, will
not be Holders or
                                      S-19
<PAGE>   20
 
entitled to the rights of Holders described below, which rights may be exercised
only by Holders. See "-- Book-Entry, Delivery and Form" and "-- Certificated
Debentures."
 
     Initially, the Trustee will act as the Registrar and Paying Agent under the
Indenture. The Company or any of its subsidiaries may subsequently act as the
Registrar or the Paying Agent, except in certain circumstances described in the
Indenture, and the Company may change any Registrar or any Paying Agent without
prior notice to the Holders. Principal, premium and interest on any Certificated
Debentures will be payable, and Certificated Debentures may be presented for
registration of transfer or exchange, at the offices of the Trustee in New York,
New York. Payments on Certificated Debentures may be paid by checks mailed to
the registered addresses of the holders of record. Holders must surrender their
Certificated Debentures to the Paying Agent to collect principal payments. The
Company may require appropriate endorsements, transfer documents and payment of
a sum sufficient to cover any transfer tax or other governmental charge payable
in connection with certain transfers or exchanges of the Debentures.
 
OPTIONAL REDEMPTION OF THE DEBENTURES
 
     The Debentures may not be redeemed by the Company prior to                ,
2004. Thereafter, the Debentures may be redeemed at the option of the Company,
in whole or in part, at the following redemption prices (expressed as a
percentage of principal amount) if redeemed during the 12-month period beginning
on           of the indicated year:
 
<TABLE>
<CAPTION>
                                                            REDEMPTION
YEAR                                                          PRICE
- ----                                                        ----------
<S>                                                         <C>
2004......................................................          %
 
2005......................................................          %
 
2006......................................................          %
 
2007 and thereafter.......................................   100.000%
</TABLE>
 
plus, in each case, accrued and unpaid interest thereon to the redemption date.
 
     If less than all of the Debentures are to be redeemed at any time,
selection of the Debentures to be redeemed will be made by the Trustee (as to
any Certificated Debentures) or, if applicable, the Depositary from among the
outstanding Debentures on a pro rata basis, by lot or by another means that is
in compliance with the requirements of the principal national securities
exchange, if any, on which the Debentures are then listed. Notice of redemption
will be mailed at least 30 days but not more than 60 days before the redemption
date to each Holder whose Debentures are to be redeemed at the registered
address of such Holder. The Company understands that the current practice of DTC
is to determine by lot the amount of the interest of each of its direct
participants to be redeemed. On and after the redemption date, interest shall
cease to accrue on the Debentures or portions thereof called for redemption.
 
     The Debentures will not have the benefit of any sinking fund.
 
MANDATORY OFFERS TO PURCHASE THE DEBENTURES
 
     The Indenture will require the Company to make an offer to purchase all of
the outstanding Debentures upon a Change of Control and a portion of the
outstanding Debentures if the Company fails to maintain its Consolidated
Tangible Net Worth above $125 million for certain periods. See "Certain
Covenants -- Change of Control" and "-- Maintenance of Consolidated Tangible Net
Worth." The Company's ability to purchase the Debentures in the event of a
Change of Control or failure to maintain its Consolidated Tangible Net Worth may
be adversely affected by, among other things, the presence of a change of
control covenant and restriction on the acquisition by the Company of
subordinated indebtedness (which includes the Debentures) in the Credit
Facility, change of control covenants in the indentures governing the
Outstanding Debentures and covenants and restrictions in the instruments
governing the Company's debt obligation in existence from time to time in the
future. See Note 6 to the Company's Consolidated Financial Statements, included
in the Company's Annual Report on Form 10-K for the year ended June 30, 1998.
There can be no assurance that
                                      S-20
<PAGE>   21
 
sufficient funds will be available in the event of a Change of Control or
failure to maintain Consolidated Tangible Net Worth to permit the Company to
make any purchases then required.
 
SUBORDINATION
 
     The Debentures will be subordinate and junior in right of payment, to the
extent and in the manner to be set forth below, to all "Senior Debt" of the
Company. The Indenture will define "Senior Debt" as all present or future "Debt"
(defined below) created, incurred, assumed or, to the extent described below,
guaranteed (to the extent of the guarantee) by the Company (and all renewals,
extensions or refundings thereof), unless the instrument under which such Debt
is created, incurred, assumed or guaranteed provides that such Debt is not
senior or superior in right of payment to the Debentures; provided, however,
that Senior Debt shall not include (a) any Debt of the Company to any of its
subsidiaries, (b) any Debt of the Company or guarantees of Debt by the Company
which by its terms or the terms of the instrument creating or evidencing it
expressly provides that such Debt or guarantee is expressly subordinated in
right of payment to any other Debt of the Company, (c) the Outstanding
Debentures or (d) guarantees by the Company of Debt (i) outstanding at the date
of the Indenture or (ii) which may be outstanding in the future, except that
Senior Debt shall include any present and future guarantees that provide by
their terms that they constitute Senior Debt and the Repayment Guaranty
(Limited) dated as of June 30, 1992 from the Company to Bank One, Arizona, NA
(formerly The Valley National Bank of Arizona) with respect to certain
indebtedness of The Villages at Desert Hills, Inc. (which is the owner of Anthem
Phoenix). The Debentures will not be senior or superior in right of payment to
the Outstanding Debentures and will rank pari passu in right of payment to the
Outstanding Debentures. "Debt" will be defined in the Indenture to mean any
indebtedness of a Person, contingent or otherwise, (x) in respect of borrowed
money (whether or not the recourse of the lender is to the whole of the assets
of such person or only to a portion thereof), (y) evidenced by bonds, notes,
debentures or similar instruments (except any of the foregoing that constitutes
a trade payable) or (z) evidenced by letters of credit.
 
     At December 31, 1998, the Senior Debt of the Company was $360.4 million. At
that date, on a pro forma basis after giving effect to the offering of the
Debentures and the anticipated application of the estimated net proceeds
thereof, the Company would have had Senior Debt of $133.5 million outstanding
under the Credit Facility and the Company's short-term lines of credit and $32.4
million of other Senior Debt. Senior Debt does not include any indebtedness of
the Company's subsidiaries. See "Use of Proceeds."
 
     By reason of this subordination, in the event of a liquidation or
dissolution of the Company or in a bankruptcy, reorganization, insolvency,
receivership or other similar proceeding relating to the Company or its
property, upon any distribution of assets, holders of Senior Debt will be
entitled to be paid principal and interest in full before principal or interest
payments may be made on the Debentures and the Holders of Debentures will be
required to pay over their share of such distribution to the holders of Senior
Debt until such Senior Debt is paid in full, except that Holders of Debentures
may receive securities that are subordinated at least to the same extent as the
Debentures are to Senior Debt. By reason of this subordination, in the event of
dissolution, insolvency or bankruptcy of the Company, Holders of the Debentures
may recover less, ratably, than holders of Senior Debt and other creditors of
the Company, or may recover nothing.
 
     The Company may not pay principal of, or interest on, the Debentures and
may not acquire any Debentures for cash or property (other than securities that
are subordinated to at least the same extent as the Debentures are subordinated
to Senior Debt) if (i) a default in the payment of any principal or other
obligations with respect to Designated Senior Debt occurs and is continuing
beyond any applicable grace period or (ii) a default, other than a payment
default, on Designated Senior Debt occurs and is continuing that permits holders
of the Designated Senior Debt to accelerate its maturity and the Trustee
receives a notice of the default from a person permitted to give such notice
under the Indenture requesting that payment of principal or interest with
respect to the Debentures be prohibited. Notwithstanding the foregoing, the
Company may resume payments in respect of the Debentures upon the earlier of (a)
the date upon which the default is cured or waived or (b) in the case of a
default referred to in (ii) above, 179 days pass after notice is received (a
"Payment Blockage Period"), provided that the terms of the Indenture otherwise
permit the payment, distribution or acquisition of the Debentures at the time in
question. Only one Payment Blockage Period may be commenced within any
consecutive 365-day period with respect to the Debentures.
                                      S-21
<PAGE>   22
 
"Designated Senior Debt" will be defined in the Indenture to mean (i) Senior
Debt of the Company permitted to be incurred under the Indenture under any
institutional credit agreement and (ii) any other Senior Debt permitted to be
incurred under the Indenture the principal amount of which is $25 million or
more.
 
CERTAIN COVENANTS
 
     Affirmative Covenants.  In addition to the covenants described below, the
Indenture will require the Company, subject to certain limitations described
therein, to, among other things, do the following: (a) deliver to the Trustee
copies of all reports filed with the Commission; (b) deliver to the Trustee
quarterly officers' certificates with respect to the Company's compliance with
its obligations under the Indenture; (c) maintain its corporate existence,
subject to the provisions described below relating to mergers and acquisitions;
and (d) pay its taxes when due except where such taxes are being contested in
good faith.
 
     Limitations on Additional Indebtedness.  The Indenture will provide that,
after the date of the Indenture, the Company will not, and will not permit any
of its Restricted Subsidiaries to, directly or indirectly, create, incur,
assume, guarantee, extend the maturity of or otherwise become liable with
respect to (collectively, "incur") any Indebtedness (other than Indebtedness
between the Company and any of its Wholly Owned Restricted Subsidiaries or among
its Wholly Owned Restricted Subsidiaries) or issue any Disqualified Stock
unless, after giving effect thereto, the Company's Consolidated Fixed Charge
Coverage Ratio on the date thereof would be at least 3.0 to 1.0.
 
     Notwithstanding the foregoing, the Company or any Restricted Subsidiary may
incur the following Indebtedness (plus interest and premium, if any, thereon)
without regard to the foregoing limitation (although any Indebtedness so
incurred will be included in the determination of the Consolidated Fixed Charge
Coverage Ratio thereafter): (i) Indebtedness under credit agreements in an
aggregate principal amount at any one time of not more than $150 million; (ii)
Indebtedness evidenced by the Debentures; (iii) Indebtedness under Guarantees of
Indebtedness incurred in the ordinary course of business of suppliers or
customers, which Guarantees are also in the ordinary course of business of the
Company or its subsidiaries; (iv) Non-Recourse Indebtedness incurred for the
acquisition and/or improvement of real property and secured by Liens on such
real property and/or improvements; (v) Refinancing Indebtedness; (vi) Excluded
Debt; and (vii) Indebtedness not otherwise permitted to be incurred pursuant to
clauses (i) through (vi) above which, together with any other then outstanding
Indebtedness incurred pursuant to this clause (vii) (and refinancings thereof),
has an aggregate principal amount at the time of incurrence of not in excess of
20 percent of Consolidated Tangible Net Worth of the Company (as of the last
fiscal quarter for which financial results have then been reported). The
Indenture will not restrict any Unrestricted Subsidiary from incurring
Indebtedness, nor will Indebtedness of any Unrestricted Subsidiary be included
in the Consolidated Fixed Charge Coverage Ratio, as long as the Unrestricted
Subsidiary incurring such Indebtedness remains an Unrestricted Subsidiary. As of
the date hereof, all of the Company's operating subsidiaries would be Restricted
Subsidiaries under the Indenture.
 
     Limitations on Restricted Payments.  The Indenture will provide that the
Company will not, and will not permit any of its Restricted Subsidiaries to,
directly or indirectly, make any Restricted Payment after the date of the
Indenture, except as provided below in this Limitations on Restricted Payments
covenant, if at the time of such Restricted Payment:
 
          (i) a Default or Event of Default shall have occurred and be
     continuing or shall occur as a consequence thereof;
 
          (ii) the amount of such Restricted Payment, when added to the
     aggregate amount of all Restricted Payments made after February 11, 1994
     other than pursuant to clause (a) below, exceeds the sum of: (1) 50 percent
     of the Company's Consolidated Net Earnings (excluding Consolidated Net
     Earnings attributable to dividends or distributions from Unrestricted
     Subsidiaries) accrued during the period (taken as one accounting period)
     since December 31, 1993 (or, if such aggregate Consolidated Net Earnings
     shall be a deficit, minus 100 percent of such aggregate deficit), plus (2)
     the sum of (x) 100 percent of the book value of property and assets (other
     than cash), determined at the time such property
                                      S-22
<PAGE>   23
 
     or assets were contributed as an Investment to an Unrestricted Subsidiary,
     received by the Company or its Wholly Owned Restricted Subsidiaries from
     any of their Unrestricted Subsidiaries, up to the amount of the Company's
     and its Restricted Subsidiaries' aggregate net Investment in Unrestricted
     Subsidiaries, provided that such property so received is substantially
     similar to the property contributed to the Unrestricted Subsidiaries, (y)
     100 percent of the cash distributions or cash dividends received by the
     Company or its Wholly Owned Restricted Subsidiaries from any Unrestricted
     Subsidiaries, to the extent the amount of such cash and such book value of
     property and assets referred to in clause (x) above do not exceed the
     amount of the Company's and its Restricted Subsidiaries' aggregate net
     Investment in Unrestricted Subsidiaries and (z) 50 percent of any other
     cash distributions or cash dividends received by the Company and its Wholly
     Owned Restricted Subsidiaries from Unrestricted Subsidiaries, plus (3) the
     aggregate net proceeds, including the fair market value of property other
     than cash (such fair market value to be determined by a majority of the
     disinterested members of the full Board of Directors of the Company, whose
     good faith determination shall be conclusive and evidenced by a resolution
     certified by an officer's certificate and filed with the Trustee), received
     by the Company from the issuance of Capital Stock of the Company (other
     than to a subsidiary of the Company) that is not Disqualified Stock since
     December 31, 1993, plus (4) 100 percent of the principal amount of any
     Indebtedness of the Company or a Wholly Owned Restricted Subsidiary that is
     converted into or exchanged for Capital Stock of the Company that is not
     Disqualified Stock since December 31, 1993, plus (5) 100 percent of the
     Released Asset Value since February 11, 1994, plus (6) 100 percent of the
     reductions since February 11, 1994 in Guarantees of the Company which are
     Investments in Unrestricted Subsidiaries to the extent such Guarantees were
     classified as Restricted Payments; or
 
          (iii) the Company would be unable to incur an additional $1 of
     Indebtedness under the Consolidated Fixed Charge Coverage Ratio in the
     Limitations on Additional Indebtedness covenant.
 
     Notwithstanding the foregoing, the Indenture will not prevent:
 
          (a) Restricted Payments since February 11, 1994 up to, but not
     exceeding, $50 million not otherwise permitted above, provided that any
     Restricted Payments made pursuant to this clause (a) shall be evidenced by
     filing with the Trustee of an officer's certificate certifying that such
     Restricted Payment has been made under this exception and, provided
     further, that no Restricted Payment (other than a Restricted Payment
     pursuant to clause (iii)(a) of the Restricted Payment definition) shall be
     made pursuant to this clause (a) if at the time of such Restricted Payment
     a Default or Event of Default shall have occurred and be continuing or
     shall occur as a consequence thereof;
 
          (b) the purchase since February 11, 1994 at a price of not more than
     $.05 per right of any rights issued or issuable pursuant to any future
     rights plan of the Company, provided that such purchases shall not exceed
     $1 million in the aggregate;
 
          (c) the payment of any dividend within 60 days after the date of
     declaration thereof if the payment thereof would have complied with the
     limitations of the Indenture on the date of declaration; or
 
          (d) the retirement of shares of the Company's Capital Stock in
     exchange for or out of the proceeds of a substantially concurrent sale
     (other than a sale to a subsidiary of the Company) of other shares of its
     Capital Stock (other than Disqualified Stock).
 
     Limitations on Restrictions on Distributions from Restricted
Subsidiaries.  The Indenture will provide that the Company will not, and will
not permit any of its Restricted Subsidiaries to, create or otherwise cause or
suffer to exist or become effective any consensual encumbrance or restriction
(other than encumbrances or restrictions imposed by law, by judicial or
regulatory action or by provisions in leases or other agreements that restrict
the assignability thereof) on the ability of any Restricted Subsidiary to (i)
pay dividends or make any other distributions on its Capital Stock which is
owned by the Company or any of its other Restricted Subsidiaries, or pay
interest on or principal of any Indebtedness owed to the Company or any of its
other Restricted Subsidiaries, (ii) make loans or advances to the Company or any
of its other Restricted Subsidiaries or (iii) transfer any of its properties or
assets to the Company or any of its other Restricted Subsidiaries, except in
each case for encumbrances or restrictions existing under or by reason of (a)
applicable
 
                                      S-23
<PAGE>   24
 
statute, law, rule, regulation or governmental order, (b) covenants or
restrictions contained in Indebtedness existing as of the date of the Indenture,
(c) any restrictions under any note, indenture, agreement or other document
evidencing any Acquired Indebtedness that was permitted to be incurred pursuant
to the Indenture, provided that such restrictions and encumbrances only apply to
assets that were subject to such restrictions and encumbrances prior to the
acquisition of such assets by the Company or its subsidiaries or assets acquired
with the proceeds of such assets, (d) restrictions or encumbrances replacing
those permitted by clause (b) or (c) which are not, in the judgment of the Board
of Directors, determined in good faith, more restrictive, (e) any restrictions
or encumbrances arising in connection with the replacement, renewal or extension
of any credit agreement, credit facility or similar arrangement existing as of
the date of the Indenture, provided that any such restrictions and encumbrances
are not, in the judgment of the Board of Directors, determined in good faith,
more restrictive than those in the credit agreement, credit facility or similar
arrangement being replaced, extended or renewed, as the case may be, (f) any
restrictions or encumbrances arising in connection with the refunding or
refinancing of any Indebtedness existing as of the date of the Indenture,
provided that any restrictions and encumbrances of the type described in this
clause that arise in connection with such refunding or refinancing are not, in
the judgment of the Board of Directors, determined in good faith, more
restrictive than those under the agreement creating or evidencing the
Indebtedness being refunded or refinanced, (g) any agreement restricting the
sale or other disposition of property securing Indebtedness permitted by the
Indenture if such agreement does not expressly restrict the ability of a
subsidiary of the Company to pay dividends or make loans or advances and (h)
reasonable and customary borrowing base covenants set forth in credit agreements
pursuant to which Indebtedness otherwise permitted by the Indenture is
outstanding (including but not limited to borrowing base covenants substantially
similar to those contained in the Revolving Loan Agreement between Del Webb
Communities, Inc. and First Interstate Bank of Nevada, as agent for the lenders,
as in effect on February 11, 1994), which covenants restrict or limit the
distribution of revenues or sale proceeds from real estate or a real estate
project based upon the amount of Indebtedness outstanding on such real estate or
real estate project and the value of some or all of the remaining real estate or
the project's remaining assets.
 
     Limitations on Transactions with Affiliates.  The Indenture will provide
that the Company and each of its Restricted Subsidiaries will not, after the
date of the Indenture, make any loan, advance, Guarantee or capital contribution
to, or for the benefit of, or sell, lease, transfer or otherwise dispose of any
of its properties or assets to, or for the benefit of, or purchase or lease any
property or assets from, or enter into or amend any contract, agreement or
understanding with, or for the benefit of, (i) any Affiliate of the Company or
any of its subsidiaries or (ii) any Person (or any Affiliate of such Person)
holding ten percent or more of the Common Equity of the Company or any of its
subsidiaries (each an "Affiliate Transaction"), except on terms that are no less
favorable to the Company or the relevant Restricted Subsidiary, as the case may
be, than those that could have been obtained in a comparable transaction on an
arm's-length basis from a Person that is not an Affiliate.
 
     The Indenture will also provide that the Company will not, and will not
permit any of its Restricted Subsidiaries to, enter into an Affiliate
Transaction involving or having a value of more than $10 million unless (i) such
Affiliate Transaction has been approved by a majority of the disinterested
members of the Board of Directors of the Company or (ii) the Company has
delivered an officer's certificate to the Trustee stating that (a) the signatory
officer was not a party to or otherwise interested in such Affiliate Transaction
and (b) the terms of such Affiliate Transaction are not less favorable to the
Company or the relevant Restricted Subsidiary, as the case may be, than those
that could have been obtained in a comparable transaction on an arm's-length
basis from a Person that is not an Affiliate. Delivery of a certificate as
required by the Indenture and described above will, absent manifest fraud,
constitute conclusive evidence that the terms of the Affiliate Transaction in
question are not less favorable to the Company or the relevant Restricted
Subsidiary, as the case may be, than those that could have been obtained in a
comparable transaction on an arm's-length basis from a Person that is not an
Affiliate.
 
     Notwithstanding the foregoing, the term "Affiliate Transaction" shall not
include any contract, agreement or understanding with or for the benefit of, or
plan for the benefit of, any or all employees of the Company or its subsidiaries
(in their capacity as such) that has been approved by the Company's Board of
 
                                      S-24
<PAGE>   25
 
Directors, a disinterested committee thereof or the Chief Executive Officer of
the Company (or his or her designee) or stock issuances to directors pursuant to
plans approved by shareholders.
 
     Change of Control.  Following any Change of Control, the Company shall
offer (a "Change of Control Offer") to purchase all outstanding Debentures at a
purchase price equal to 101 percent of the aggregate principal amount of the
Debentures, plus accrued and unpaid interest to the date of purchase.
 
     Within 30 days after any Change of Control, the Company, or the Trustee at
the Company's request, will mail or cause to be mailed to all Holders on the
date of the Change of Control a notice of the occurrence of such Change of
Control and of the Holders' rights arising as a result thereof. Such notice will
contain all instructions and materials necessary to enable Holders to tender
their Debentures to the Company. Any Change of Control Offer will be conducted
in compliance with applicable regulations under the federal securities laws,
including Rule 14e-l promulgated under the Securities Exchange Act of 1934, as
amended (the "Exchange Act").
 
     The Company's ability to purchase Debentures pursuant to a Change of
Control Offer may be restricted by covenants in the indentures for the
Outstanding Debentures, the Credit Facility and other credit agreements the
Company may have in the future. Also, there can be no assurance that sufficient
funds will be available at the time of any Change of Control Offer to make any
required repurchases. However, the Company's failure to comply with the Change
of Control covenant will be an Event of Default under the Indenture if such
failure continues for a specified period and the required notice is given by the
Trustee or the Holders of not less than 25 percent in principal amount of the
then outstanding Debentures.
 
     Except as described above with respect to a Change of Control, the
Indenture does not contain provisions that will afford Holders of the Debentures
protection in the event of a highly leveraged transaction, takeover,
reorganization, restructuring, recapitalization, merger or similar transaction
involving the Company that may adversely affect Holders.
 
     Limitations on Mergers and Consolidations.  The Indenture will provide that
the Company will not consolidate or merge with or into, or sell, lease, convey
or otherwise dispose of all or substantially all of its assets (including by way
of liquidation or dissolution) to any Person, unless: (i) the Person formed by
or surviving such consolidation or merger (if other than the Company), or to
which such sale, lease, conveyance or other disposition shall be made
(collectively, the "Successor"), is a corporation or other legal entity
organized and existing under the laws of the United States or any State thereof
or the District of Columbia and the Successor assumes by supplemental indenture
in a form reasonably satisfactory to the Trustee all of the obligations of the
Company under the Debentures and the Indenture; (ii) immediately after giving
effect to such transaction, no Default or Event of Default shall have occurred
and be continuing; (iii) immediately after giving effect to such transaction and
the use of any net proceeds therefrom, on a pro forma basis, the Consolidated
Tangible Net Worth of the Company or the Successor, as the case may be, would be
at least equal to the Consolidated Tangible Net Worth of the Company immediately
prior to such transaction; and (iv) the Consolidated Fixed Charge Coverage Ratio
of the Company or the Successor, as the case may be, immediately after giving
effect to such transaction, would be such that the Company or the Successor, as
the case may be, would be entitled to incur at least $1 of additional
Indebtedness under the Consolidated Fixed Charge Coverage Ratio test in the
Limitations on Additional Indebtedness covenant. For this purpose, a sale,
lease, conveyance or other disposition by the Company and/or its subsidiaries of
all or substantially all of the assets of the Company and its subsidiaries,
taken as a whole, shall be deemed a sale, lease, conveyance or other disposition
of all or substantially all of the assets of the Company. The meaning of the
term "all or substantially all of the assets" has not been definitely
established, is likely to be interpreted by reference to applicable state law if
and at the time the issue arises and will be dependent on the facts and
circumstances existing at that time. Accordingly, there may be uncertainty as to
whether a Holder or beneficial owner of Debentures can determine whether a
Change of Control has occurred and exercise any remedies such Holder or
beneficial owner may have upon a Change of Control.
 
     Maintenance of Consolidated Tangible Net Worth.  The Indenture will provide
that if the Company's Consolidated Tangible Net Worth at the end of each of any
two consecutive fiscal quarters (the last day of the second such fiscal quarter
being referred to as a "Deficiency Date") is less than $125 million (the
"Minimum
                                      S-25
<PAGE>   26
 
Consolidated Tangible Net Worth"), then the Company shall, no later than 60 days
after a Deficiency Date (or 120 days if a Deficiency Date is also the end of the
Company's fiscal year), offer to purchase (a "Net Worth Offer") ten percent of
the principal amount of Debentures originally issued under the Indenture (or
such lesser amount as may be outstanding at the time the Net Worth Offer is
made) (the "Offer Amount") at a purchase price equal to 100 percent of the
aggregate principal amount thereof, plus accrued and unpaid interest to the
purchase date; provided, however, that no such Net Worth Offer shall be required
if, after the Deficiency Date but prior to the timely delivery of the officer's
certificate required by the Indenture, capital is contributed or otherwise paid
to the Company or its subsidiaries sufficient to increase the Company's
Consolidated Tangible Net Worth to $125 million or more. The Net Worth Offer
shall remain open for a period of 20 business days following its commencement
and no longer, unless a longer period is required by law (the "Offer Period").
Promptly after the termination of the Offer Period, the Company shall purchase
and mail or deliver payment for the Offer Amount of Debentures tendered or, if
less than the Offer Amount has been tendered, all Debentures tendered in
response to the Net Worth Offer. In no event shall the Company's failure to meet
the Minimum Consolidated Tangible Net Worth at the end of any fiscal quarter be
counted towards the making of more than one Net Worth Offer. The principal
amount of Debentures to be purchased pursuant to a Net Worth Offer may be
reduced by the principal amount of Debentures acquired by the Company through
purchase or redemption (other than pursuant to a Change of Control Offer)
subsequent to the Deficiency Date and surrendered to the Trustee for
cancellation. Any Net Worth Offer shall be conducted in compliance with
applicable regulations under the federal securities law, including Exchange Act
Rule 14e-l.
 
     The Company's ability to purchase Debentures in the event it is required to
make a Net Worth Offer may be adversely affected by, among other things, the
indentures for the Outstanding Debentures, the Credit Facility and other credit
agreements the Company may have in the future. There can be no assurance that
sufficient funds will be available at the time of any Net Worth Offer to make
required purchases. The Company's failure to comply with the Maintenance of
Consolidated Tangible Net Worth covenant will be an Event of Default under the
Indenture if such failure continues for a specified period and the required
notice is given by the Trustee or the Holders of not less than 25 percent in
principal amount of the then outstanding Debentures.
 
     Limitation on Ranking of Future Indebtedness.  The Company will not,
directly or indirectly, incur, create, assume, guarantee or otherwise become
liable for any indebtedness which is subordinated in right of payment to any
Senior Debt of the Company and senior in right of payment to the Debentures.
 
EVENTS OF DEFAULT
 
     An "Event of Default" will be defined in the Indenture as: (i) failure by
the Company to pay interest on any of the Debentures when it becomes due and
payable, whether or not prohibited by the subordination provisions of the
Indenture, and the continuance of any such failure for 30 days; (ii) failure by
the Company to pay the principal on the Debentures when due, either at maturity,
upon redemption at the option of the Company, by declaration of acceleration or
otherwise, whether or not prohibited by the subordination provisions of the
Indenture; (iii) failure by the Company to comply with any agreement or covenant
in the Indenture or the Debentures and continuance of such failure for 60 days
(or for ten days in the case of the covenant described under "Certain
Covenants -- Change of Control") after notice of such failure has been given to
the Company by the Trustee or by the Holders of at least 25 percent of the
aggregate principal amount of the Debentures then outstanding (except that with
respect to certain covenants, such defaults shall be Events of Default with such
notice but without such passage of time); (iv) an event of default under any
mortgage, indenture or instrument under which there may be issued or by which
there may be secured or evidenced any Indebtedness for money borrowed by the
Company or any of its Restricted Subsidiaries (or the payment of which is
Guaranteed by the Company or any of its Restricted Subsidiaries, to the extent
of the Guarantee) other than Non-Recourse Indebtedness if (a) either (1) such
event of default results from the failure to pay any such Indebtedness when due
(whether at maturity or otherwise) or (2) as a result of such event of default
the maturity of such Indebtedness has been accelerated prior to its expressed
maturity and (b) the principal amount of such Indebtedness, together with the
principal amount of any other such Indebtedness in default for failure to pay
principal when due or the maturity of which has been so accelerated,
 
                                      S-26
<PAGE>   27
 
equals or exceeds $10 million or more in the aggregate, without such
Indebtedness having been discharged or such acceleration rescinded within 30
days after notice to the Company from the Trustee or the Holders of 25 percent
in principal amount of the Debentures then outstanding; (v) a final judgment or
judgments, except to the extent the judgment or judgments are in respect of
Non-Recourse Indebtedness, that exceed $10 million in the aggregate, for the
payment of money, having been entered by a court or courts of competent
jurisdiction, and remaining undischarged for a period (during which execution
shall not be effectively stayed) of 60 days, against (a) the Company, (b) any of
its Material Subsidiaries which is at the time a Restricted Subsidiary or (c)
any subsidiary which is at the time a Restricted Subsidiary and which is (1) a
member of a Material Subsidiary Group and (2) material to or holds material
assets of (in each case as determined in good faith by the Board of Directors)
the specific real estate project in respect of which it is a member of the
Material Subsidiary Group; and (vi) certain events of bankruptcy, insolvency or
reorganization involving (a) the Company, (b) any of its Material Subsidiaries
which is at the time a Restricted Subsidiary or (c) any subsidiary which is at
the time a Restricted Subsidiary and which is (1) a member of a Material
Subsidiary Group and (2) material to or holds material assets of (in each case
as determined in good faith by the Board of Directors) the specific real estate
project in respect of which it is a member of the Material Subsidiary Group.
 
     If an Event of Default (other than an Event of Default resulting from
bankruptcy, insolvency or reorganization involving the Company) shall have
occurred and be continuing, the Trustee by written notice to the Company, or the
Holders of at least 25 percent in aggregate principal amount of the Debentures
then outstanding by written notice to the Company and the Trustee, may declare
all amounts owing under the Debentures to be due and payable. Upon such
declaration of acceleration, the aggregate principal amount of, and all accrued
and unpaid interest on, the outstanding Debentures shall immediately become due
and payable. If an Event of Default results from bankruptcy, insolvency or
reorganization involving the Company, all outstanding Debentures shall become
due and payable without any further action or notice. The Holders of a majority
in aggregate principal amount of the Debentures then outstanding may waive or
annul an existing Default or Event of Default (other than any Default or Event
of Default in payment of principal or interest on the Debentures), and its
consequences, under the Indenture.
 
     The Holders may not institute any action to enforce the provisions of the
Indenture or the Debentures (except actions for payment of overdue principal or
interest) unless (a) such Holders previously have given the Trustee written
notice of the default and continuance thereof, (b) the Holders of not less than
25 percent in principal amount of the Debentures then outstanding have requested
the Trustee to institute such action and offered the Trustee reasonable
indemnity, (c) the Trustee has not instituted such action within 60 days of the
request and (d) the Trustee has not received direction inconsistent with such
written request from the Holders of a majority in principal amount of the
Debentures then outstanding.
 
     Subject to certain limitations, Holders of a majority in principal amount
of the Debentures then outstanding may direct the Trustee in its exercise of any
trust or power, provided that such direction does not conflict with the terms of
the Indenture and such Holders have offered to the Trustee security and
indemnity satisfactory to the Trustee. The Trustee may withhold from the Holders
notice of any continuing Default or Event of Default (except any Default or
Event of Default in payment of principal or interest on the Debentures) if the
Trustee determines that withholding such notice is in the Holders' interest.
 
     The Company is required to deliver to the Trustee quarterly a statement
regarding compliance with the Indenture, and upon any Officer of the Company
becoming aware of any Default or Event of Default, a statement specifying such
Default or Event of Default.
 
     The Indenture will provide that no director, officer, employee or
shareholder of the Company, as such, will have any liability for any obligations
of the Company under the Debentures or the Indenture. The Indenture and the
Debentures will each provide that each holder of the Debentures, and each
beneficial owner of the Debentures, by accepting the Debentures, waives and
releases all such liability.
 
DEFEASANCE AND DISCHARGE
 
     The Company can discharge or defease its obligations under the Indenture as
set forth below.
                                      S-27
<PAGE>   28
 
     Under terms satisfactory to the Trustee, the Company may discharge certain
obligations to Holders of Debentures that have not already been delivered to the
Trustee for cancellation and that have either become due and payable or are by
their terms due and payable within one year (or scheduled for redemption within
one year) by irrevocably depositing with the Trustee cash or United States
Government Obligations, or a combination thereof, as trust funds in an amount
certified to be sufficient to pay at maturity (or upon redemption) the principal
of and interest on such Debentures.
 
     The Company may also discharge any and all of its obligations to Holders of
the Debentures at any time ("defeasance"), but may not thereby avoid its duty to
register the transfer or exchange of the Debentures, to replace any temporary,
mutilated, destroyed, lost or stolen Debentures or to maintain an office or
agency in respect of such Debentures and certain other obligations.
Alternatively, the Company may be released with respect to the Debentures from
the obligations imposed by specified portions of Article 4 and by Article 5 of
the Indenture (which contain, among other things, the covenant described above
limiting consolidations, mergers, asset sales and leases) and omit to comply
with such Articles or portions thereof without creating an Event of Default
("covenant defeasance"). Defeasance or covenant defeasance may be effected only
if, among other things: (a) the Company irrevocably deposits with the Trustee
cash or United States Government Obligations, or a combination thereof, as trust
funds in an amount certified to be sufficient to pay at maturity the principal
of and interest on all outstanding Debentures; (b) no Event of Default under the
Indenture has occurred and is then continuing; (c) the defeasance or covenant
defeasance will not result in an event of default under any agreement to which
the Company is a party or by which it is bound; and (d) the Company delivers to
the Trustee an opinion of counsel to the effect that the Holders of Debentures
will not recognize income, gain or loss for federal income tax purposes as a
result of such defeasance or covenant defeasance and, in effect, that such
defeasance or covenant defeasance will not otherwise alter such Holders' federal
income tax treatment of principal and interest payments on the Debentures.
 
MODIFICATION OF THE INDENTURE
 
     The Indenture will provide that the Company and the Trustee may enter into
supplemental indentures without the consent of the Holders of Debentures to,
among other things: (a) cure any ambiguity or correct any inconsistency in the
Indenture; (b) make any change that does not adversely affect the legal rights
of Holders of Debentures; (c) modify, eliminate or add to the provisions of the
Indenture to the extent necessary to qualify the Indenture under applicable
federal statutes; (d) provide for uncertificated Debentures in addition to
certificated Debentures; or (e) surrender any right or power conferred by the
Indenture upon the Company.
 
     The Indenture also will contain provisions permitting the Company and the
Trustee, with the consent of the Holders of not less than a majority in
principal amount of Debentures outstanding, to add any provision to, change in
any manner or eliminate any of the provisions of the Indenture or modify in any
manner the rights of the Holders of the Debentures so affected; provided,
however, that the Company and the Trustee may not, without the consent of the
Holder of each outstanding Debenture affected thereby, do, among other things,
any of the following: (a) reduce the amount of Debentures whose Holders must
consent to an amendment, supplement or waiver with respect to the Indenture; (b)
reduce the rate of or change the time for payment of interest on any Debentures;
(c) reduce the principal of or change the fixed maturity of any Debenture or
alter the redemption provisions with respect thereto; (d) waive a default in the
payment of the principal of, or interest on, any Debenture; (e) make any
Debenture payable in money other than that stated in the Debenture; and (f) make
any change in the provisions of the Indenture relating to waiver of past
defaults, the rights of Holders of Debentures to receive payments of principal
of or interest on the Debentures or the foregoing amendment provisions.
 
     The Indenture may not be amended to alter the subordination of any
outstanding Debentures without the consent of each holder of Senior Debt then
outstanding that would be adversely affected in any material respect thereby.
 
                                      S-28
<PAGE>   29
 
TRANSFER AND EXCHANGE
 
     A Holder will be able to transfer or exchange Debentures only in accordance
with the provisions of the Indenture. The Registrar and the Company may require
a Holder, among other things, to furnish appropriate endorsements and transfer
documents and to pay any taxes and fees required by law or permitted by the
Indenture. The Company is not required to (i) transfer or exchange any Debenture
selected for redemption or (ii) transfer or exchange any Debenture for a period
of 15 days before a selection of Debentures to be redeemed. The registered
Holder of a Debenture (as opposed to the beneficial owner, if different) may be
treated as the owner of such Debenture for all purposes.
 
CONCERNING THE TRUSTEE
 
     The Indenture will contain certain limitations on the rights of the
Trustee, should it become a creditor of the Company, to obtain payment of claims
in certain cases or to realize on certain property received in respect of any
such claim as security or otherwise. The Trustee will be permitted to engage in
other transactions; however, if it acquires any conflicting interest, it must
eliminate such conflict or resign.
 
     The Holders of a majority in principal amount of the then outstanding
Debentures will have the right to direct the time, method and place of
conducting any proceeding for exercising any remedy available to the Trustee,
subject to certain exceptions. The Indenture provides that in case an Event of
Default occurs and is not cured, the Trustee will be required, in the exercise
of its power, to use the degree of care of a prudent person in similar
circumstances in the conduct of his, her or its own affairs. Subject to such
provisions, the Trustee will be under no obligation to exercise any of its
rights or powers under the Indenture at the request of any Holder, unless such
Holder shall have offered to the Trustee security and indemnity satisfactory to
the Trustee.
 
CERTAIN DEFINITIONS
 
     Set forth below is a summary of certain of the defined terms used in the
Indenture.
 
     "Acquired Indebtedness" means (i) with respect to any Person that becomes a
subsidiary of the Company after the date of the Indenture, indebtedness of such
Person and its subsidiaries existing at the time such Person becomes a
subsidiary of the Company that was not incurred in connection with, or in
contemplation of, such Person becoming a subsidiary of the Company and (ii) with
respect to the Company or any of its subsidiaries, any Indebtedness assumed by
the Company or any of its subsidiaries in connection with the acquisition of an
asset from another Person that was not incurred by such other Person in
connection with, or in contemplation of, such acquisition.
 
     "Affiliate" of any Person means any Person directly or indirectly
controlling or controlled by, or under direct or indirect common control with,
the referent Person. For purposes of this definition, control of a Person shall
mean the power to direct the management and policies of such Person, directly or
indirectly, whether through the ownership of voting securities, by contract or
otherwise. Notwithstanding the foregoing, the term "Affiliate" shall not
include, with respect to the Company or any Wholly Owned Subsidiary of the
Company, any Wholly Owned Subsidiary of the Company.
 
     "Asset Sale" for any Person means the sale, lease, conveyance or other
disposition (including, without limitation, by merger, consolidation, operation
of law or otherwise) of any assets of the Company or its Restricted Subsidiaries
in any transaction, or series of related transactions, outside of the Company's
then ordinary course of business, where the proceeds from any such sale, lease,
conveyance or other disposition, whether in a transaction or series of related
transactions, exceeds $1,000,000.
 
     "Board of Directors" means the Board of Directors of the Company and any
committee thereof.
 
     "Capital Stock" of any Person means any and all shares, rights to purchase,
warrants or options (whether or not currently exercisable), participations or
other equivalents of or interests in (however designated) the equity (which
includes, but is not limited to, common stock, preferred stock and partnership
and joint venture
 
                                      S-29
<PAGE>   30
 
interests) of such Person (excluding any debt securities that are convertible
into, or exchangeable for, such equity).
 
     "Capitalized Lease Obligations" of any Person means the obligations of such
Person to pay rent or other amounts under a lease that is required to be
capitalized for financial reporting purposes in accordance with GAAP, and the
amount of such obligation shall be the capitalized amount thereof determined in
accordance with GAAP.
 
     "Change of Control" means any of the following: (i) the sale, lease,
conveyance or other disposition of all or substantially all of the Company's
assets as an entirety or substantially as an entirety to any Person or "group"
(within the meaning of Section 13(d)(3) of the Exchange Act) in one or a series
of transactions, provided that a transaction where the holders of all classes of
Common Equity of the Company immediately prior to such transaction own, directly
or indirectly, 50 percent or more of all classes of Common Equity of such Person
or group immediately after such transactions shall not be a change of control;
(ii) the acquisition by the Company and/or any of its subsidiaries of 50 percent
or more of the aggregate voting power of all classes of Common Equity of the
Company in one transaction or a series of related transactions; (iii) the
liquidation or dissolution of the Company, provided that a liquidation or
dissolution of the Company which is part of a transaction or series of related
transactions that does not constitute a change of control under the "provided"
clause of clause (i) above shall not constitute a change of control under this
clause (iii); or (iv) any transaction or series of transactions (as a result of
a tender offer, merger, consolidation or otherwise) that results in, or that is
in connection with, (a) any Person, including a "group" (within the meaning of
Section 13(d)(3) of the Exchange Act) that includes such Person, acquiring
"beneficial ownership" (as defined in Rule 13d-3 under the Exchange Act),
directly or indirectly, of 50 percent or more of the aggregate voting power of
all classes of Common Equity of the Company or any Person that possesses
"beneficial ownership" (as defined in Rule 13d-3 under the Exchange Act),
directly or indirectly, of 50 percent or more of the aggregate voting power of
all classes of Common Equity of the Company, or (b) less than 50 percent
(measured by the aggregate voting power of all classes) of the Company's Common
Equity being registered under Section 12(b) or 12(g) of the Exchange Act.
 
     "Common Equity" of any Person means all Capital Stock of such Person that
is generally entitled to (i) vote in the election of directors of such Person or
(ii) if such Person is not a corporation, vote or otherwise participate in the
selection of the governing body, partners, managers or others that will control
the management and policies of such Person.
 
     "Consolidated Cash Flow Available for Fixed Charges" of the Company means
for any period the amounts for such period of (i) Consolidated Net Earnings,
plus (ii) Consolidated Income Tax Expense, plus (iii) amortization of
capitalized interest included in cost of sales, plus (iv) allocation of noncash
costs to cost of sales, excluding interest, plus (v) to the extent not otherwise
included, other noncash charges to earnings, net, reduced by (vi) noncash
earnings included in Consolidated Net Earnings; all as determined on a
consolidated basis for the Company and its Restricted Subsidiaries in accordance
with GAAP.
 
     "Consolidated Fixed Charge Coverage Ratio" of the Company means, with
respect to any determination date, the ratio of (i) Consolidated Cash Flow
Available for Fixed Charges of the Company for the prior four full fiscal
quarters for which financial results have been reported immediately preceding
the determination date to (ii) the aggregate Consolidated Interest Expense of
the Company for the prior four full fiscal quarters for which financial results
have been reported immediately preceding the determination date.
 
     "Consolidated Income Tax Expense" of the Company for any period means the
provision for taxes based on earnings and profits of the Company and its
Restricted Subsidiaries (but only to the extent such income or profits were
included in computing the Consolidated Net Earnings of the Company for such
period), determined on a consolidated basis consistent with the Company's past
practices under SFAS 96.
 
     "Consolidated Interest Expense" of the Company for any period means the
aggregate amount of interest which, in conformity with GAAP, would be set
opposite the caption "interest expense" or any like caption on the consolidated
statement of earnings of the Company and its Restricted Subsidiaries (including,
but not limited to, imputed interest included on Capitalized Lease Obligations,
all commissions, discounts and other
 
                                      S-30
<PAGE>   31
 
fees and charges owed with respect to letters of credit and bankers' acceptance
financing, the net costs associated with hedging obligations, amortization of
other financing fees and expenses, the interest portion of any deferred payment
obligation, amortization of discount or premium, if any, and all other noncash
interest expense other than interest amortized to cost of sales) and includes,
without duplication (including duplication of the foregoing items), all
capitalized interest and all interest incurred in connection with Investments in
Discontinued Operations for such period and interest actually paid by the
Company or a Restricted Subsidiary under any Guarantee of Indebtedness
(including a Guarantee of principal, interest or any combination thereof) of any
other Person, all determined on a consolidated basis in accordance with GAAP.
 
     "Consolidated Net Earnings" of the Company for any period means the net
income (or loss) of the Company and its Restricted Subsidiaries for such period
determined on a consolidated basis in accordance with GAAP (except that income
taxes shall be determined on a basis consistent with the Company's past
practices under SFAS 96); provided that there shall be excluded from such net
income (to the extent otherwise included therein), without duplication: (i) the
net income (or loss) of any Person (other than a Restricted Subsidiary of the
Company) in which any Person other than the Company has an ownership interest,
except to the extent that any such income has actually been received by the
Company or any of its Wholly Owned Restricted Subsidiaries in the form of
dividends or similar distributions during such period; (ii) except to the extent
includible in the consolidated net income of the Company pursuant to the
foregoing clause (i), the net income (or loss) of any Person that accrued prior
to the date that (a) such Person becomes a Restricted Subsidiary of the Company
or is merged into or consolidated with the Company or any of its Restricted
Subsidiaries or (b) the assets of such Person are acquired by the Company or any
of its Restricted Subsidiaries; (iii) the net earnings of any Restricted
Subsidiary of the Company (other than a Wholly Owned Restricted Subsidiary) to
the extent that (but only so long as) the declaration or payment of dividends or
similar distributions by such Restricted Subsidiary of those earnings is not
permitted by operation of the terms of its charter or any agreement, instrument,
judgment, decree, order, statute, rule or governmental regulation applicable to
the Restricted Subsidiary during such period (and when and to the extent such
dividend or other distribution is permitted, such income not previously
recognized shall then be recognized, in the period when such dividend or other
distribution was permitted and to the extent of such permission); (iv) any gain
(but not loss), together with any related provisions for taxes on any such gain,
realized during such period by the Company or any of its Restricted Subsidiaries
upon (a) the acquisition of any securities, or the extinguishment of any
Indebtedness, of the Company or any of its Restricted Subsidiaries or (b) any
Asset Sale by the Company or any of its Restricted Subsidiaries; (v) any
extraordinary gain (but not extraordinary loss), together with any related
provision for taxes on any such extraordinary gain, realized by the Company or
any of its Restricted Subsidiaries during such period; and (vi) in the case of a
successor to the Company by consolidation, merger or transfer of its assets, any
earnings of the successor prior to such merger, consolidation or transfer of
assets; provided, further, that there shall be included in such Consolidated Net
Earnings (to the extent not otherwise included therein) the net earnings of any
Unrestricted Subsidiary of the Company to the extent such net earnings are
received by the Company or a Wholly Owned Restricted Subsidiary in the form of
cash dividends or other cash distributions from such Unrestricted Subsidiary;
provided, further, that, in calculating Consolidated Net Earnings, the Company
shall be entitled to take into consideration the tax benefits associated with
any loss, but only when and to the extent such tax benefits are recognized by
the Company; provided, further, that solely for purposes of calculating the
Consolidated Fixed Charge Coverage Ratio in the Limitations on Additional
Indebtedness Covenant included in the Indenture, Consolidated Net Earnings shall
exclude (x) any non-cash losses on valuation reserves relating to Discontinued
Operations, Foothills, the 5,661-acre tract of land referred to under "Business
and Properties -- Other Real Estate Activities -- Other" in the Annual Report of
the Company on Form 10-K for the year ended June 30, 1993 or the 77-acre tract
of land in Fort Collins, Colorado, except to the extent the Company has made
Investments in the particular Discontinued Operation, Foothills or such other
tracts of land in question since February 11, 1994, and (y) any noncash losses,
whether or not extraordinary, incurred in connection with the issuance of
Capital Stock (other than Disqualified Stock) in exchange for Indebtedness of
the Company or its Wholly Owned Restricted Subsidiaries since February 11, 1994.
 
                                      S-31
<PAGE>   32
 
     "Consolidated Tangible Net Worth" of the Company as of any date means the
stockholders' equity (including any preferred stock that is classified as equity
under GAAP, other than Disqualified Stock) of the Company and its Restricted
Subsidiaries on a consolidated basis at such date, as determined in accordance
with GAAP, less (i) all write-ups subsequent to December 31, 1992 in the book
value of any asset owned by the Company or any of its Restricted Subsidiaries
and (ii) Intangible Assets reflected on the consolidated balance sheet of the
Company and its Restricted Subsidiaries as of such date.
 
     "Default" means any event, act or condition that is, or after notice or the
passage of time or both would be, an Event of Default.
 
     "Discontinued Operations" means with respect to the Company those
operations of the Company and its subsidiaries which were classified as
"discontinued operations" in the consolidated financial statements of the
Company and its subsidiaries as of December 31, 1992.
 
     "Disqualified Stock" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible or for which it is
exchangeable), or upon the happening of any event, matures or is mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, or is redeemable
at the option of the holder thereof, in whole or in part, on or prior to the
final maturity date of the Debentures.
 
     "Excess Asset Lien" means a Lien on assets or property securing
Non-Recourse Indebtedness incurred pursuant to clause (iv) of the Limitation on
Additional Indebtedness covenant to the extent the aggregate undepreciated and
unamortized cost basis of such assets or property exceeds the outstanding
principal amount of such Non-Recourse Indebtedness. The amount of a Restricted
Payment based upon the grant of an Excess Asset Lien is the amount by which the
undepreciated and unamortized cost basis of such assets or property at the date
of grant of the Lien exceeds the outstanding principal amount of such
Non-Recourse Indebtedness.
 
     "Excluded Debt" means any Indebtedness of the Company which is (i)
subordinated (subject to the rights of holders of Senior Debt) in right of
payment to the Debentures (upon liquidation or otherwise) at least to the extent
that the Debentures are subordinated to Senior Debt and (ii) matures after, and
is not redeemable mandatorily or at the option of the holder thereof prior to,
the final maturity date of the Debentures.
 
     "Foothills" means Del E. Webb Foothills Corporation, the successor to an
Arizona general partnership organized on January 31, 1986 for the purpose of
acquiring and developing certain real property in Phoenix, Arizona (and its
successors).
 
     "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board, in each case as in effect on February
11, 1994.
 
     "Guarantee" with respect to any obligation means: (i) any direct or
indirect guarantee; (ii) any direct or indirect agreement or arrangement,
contingent or otherwise, to purchase, repurchase or otherwise acquire any part
or all of such obligation; or (iii) any other direct or indirect agreement or
arrangement the practical effect of which is to assure the payment or
performance (or payment of damages in the event of nonperformance) of all or any
part of such obligation.
 
     "Indebtedness" of any Person at any date means, without duplication, (i)
all indebtedness of such Person for borrowed money (whether or not the recourse
of the lender is to the whole of the assets of such Person or only to a portion
thereof), (ii) all obligations of such Person evidenced by bonds, debentures,
notes or other similar instruments, (iii) all obligations of such Person in
respect of letters of credit or other similar instruments (or reimbursement
obligations with respect thereto), other than standby letters of credit incurred
by such Person in the ordinary course of business; (iv) all obligations of such
Person to pay the deferred and unpaid purchase price of property or services,
except trade payables and accrued expenses incurred in the ordinary course of
business, (v) all Capitalized Lease Obligations of such Person, (vi) all
Indebtedness of others secured by a Lien (other than assessment district and
similar Liens arising in connection with municipal financings) on any asset of
such Person, whether or not such Indebtedness is assumed by such
 
                                      S-32
<PAGE>   33
 
Person, and (vii) all Indebtedness of others Guaranteed by such Person to the
extent of such Guarantee. The amount of Indebtedness of any Person at any date
shall be (a) the outstanding balance at such date of all unconditional
obligations described above, (b) the maximum liability of such Person for any
contingent obligations under clause (iii) above and (c) in the case of clause
(vi), the lesser of (A) the fair market value of any asset subject to a Lien
securing the Indebtedness of others on the date that the Lien attaches and (B)
the amount of the Indebtedness secured. To the extent such Person Guarantees the
obligation of another Person to pay interest on indebtedness owed by such other
Person, then a designated percentage of the interest Guaranteed or the principal
amount of the underlying Indebtedness, as the case may be, shall be deemed
indebtedness of the referent Person. For purposes of this definition, the amount
of such deemed Indebtedness of the referent Person shall be equal to the lesser
of: (a) the aggregate principal amount of the underlying Indebtedness relating
to such interest Guarantee or (b) the aggregate amount of interest due and
payable over the term of such Indebtedness (or the term of the Debentures, if
shorter) determined based upon the rate of interest in effect as of the date of
such determination, together with the maximum prepayment premium or penalty
which could become due or payable with respect to such Indebtedness if such
Indebtedness was prepaid prior to the maturity of the Debentures.
Notwithstanding the foregoing, Indebtedness shall not include (v) Indebtedness
which has been defeased or discharged, (w) Indebtedness in respect of interest
rate swap or similar agreements intended to protect against fluctuations in
interest rates, or foreign currency hedge, exchange or similar agreements
intended to protect against fluctuations in currency exchange rates, (x)
Indebtedness arising from the honoring by a bank or other financial institution
of a check, draft or similar instrument drawn against insufficient funds in the
ordinary course of business, provided that such Indebtedness is extinguished
within five Business Days of its incurrence, (y) letters of credit provided in
the ordinary course of business securing performance (and not financial)
obligations and (z) performance, completion, surety and similar bonds and
similar purpose undertakings provided in the ordinary course of business.
 
     "Intangible Assets" of the Company means all unamortized debt discount and
expense, unamortized deferred charges, goodwill, patents, trademarks, service
marks, trade names, copyrights, write-ups of assets over their carrying value at
December 31, 1992 or the date of acquisition, if acquired subsequent thereto,
and all other items which would be treated as intangibles on the consolidated
balance sheet of the Company and its Restricted Subsidiaries prepared in
accordance with GAAP.
 
     "Investments" of any Person means (i) all investments (assets net of
liabilities) by such Person in any other Person in the form of loans, advances
or capital contributions, (ii) all Guarantees of Indebtedness or other
obligations of any other Person by such Person, (iii) all purchases (or other
acquisitions for consideration) by such Person of Indebtedness, Capital Stock or
other securities of any other Person and (iv) all other items that would be
classified as investments (including, without limitation, purchases of assets
outside the ordinary course of business) on a balance sheet of such Person
prepared in accordance with GAAP.
 
     "Lien" means, with respect to any asset, any mortgage, deed of trust,
pledge, lien, charge, security interest, adverse claim affecting title or
resulting in a charge against such asset, or encumbrance of any kind in respect
of such asset, whether or not filed, recorded or otherwise perfected under
applicable law (including any conditional sale or other title retention
agreement, any lease in the nature thereof, any option or other agreement to
sell).
 
     "Material Subsidiary" means (i) any subsidiary of the Company that holds,
directly or indirectly, a material amount of the assets of Sun City West, Sun
City Las Vegas, Sun City Palm Desert or Sun City Tucson or (ii) any other
subsidiary of the Company which accounted for (a) 5 percent or more of the
revenues of the Company on a consolidated basis for the four full fiscal
quarters for which financial results have been reported immediately prior to the
Default or Event of Default and (b) 5 percent or more of the total assets of the
Company on a consolidated basis as of the four full fiscal quarters for which
financial results have been reported immediately prior to the Default or Event
of Default. Subsidiaries of the Company that hold assets of a specific real
estate project will be a "Material Subsidiary Group" if such subsidiaries, when
considered as one subsidiary, would be a Material Subsidiary under clause (ii)
of the preceding sentence.
 
                                      S-33
<PAGE>   34
 
     "Non-Recourse Indebtedness" means Indebtedness secured by a Lien on
property to the extent the liability for such Indebtedness (and any interest
thereon) is limited to the security of the borrower's rights in such property
and its income and rents, without liability on the part of the Company or any of
its subsidiaries for any deficiency, including liability by reason of any
agreement by the Company or any of its subsidiaries to provide additional
capital or maintain the financial condition of or otherwise support the credit
of the Person incurring such indebtedness; provided, however, that with respect
to the Company and its Restricted Subsidiaries, Non-Recourse Indebtedness shall
also include Indebtedness of Coventry of California, Inc., Del Webb's Coventry
Homes, Inc., Del Webb's Coventry Homes Construction Co., Del Webb's Coventry
Homes of Tucson, Inc., Del Webb's Coventry Homes Construction of Tucson Co., Del
Webb's Coventry Homes of Nevada, Inc., Del Webb Homes, Inc., Trovas Company and
Trovas Construction Co. (collectively "Coventry"), but only to the extent that,
and so long as, (a) such Indebtedness shall have no recourse whatsoever
(including but not limited to, no recourse with respect to the collection of
principal or interest on such Indebtedness) to the Company or any Restricted
Subsidiary of the Company (other than Coventry) or any assets of the Company or
any Restricted Subsidiary of the Company (other than Coventry), (b) neither the
Company nor any of its Restricted Subsidiaries (other than Coventry) shall have
provided to any holder of Indebtedness of Coventry any covenant or agreement to
maintain a minimum net worth at Coventry or otherwise directly or indirectly
provided any other similar form of credit or capital support to Coventry, (c)
the proceeds of such Indebtedness are used exclusively by Coventry in connection
with its business and (d) the aggregate of all direct and indirect Investments
by the Company and its Restricted Subsidiaries in Coventry shall not exceed $15
million. Indebtedness which is otherwise Non-Recourse Indebtedness will not lose
its character as Non-Recourse Indebtedness because there is recourse to the
borrower, any guarantor or any other Person for (1) environmental warranties or
indemnities, (2) indemnities for fraud, misrepresentation or non-payment of
rents or profits from secured assets to be paid to the lender or (3) any other
matters which are at the relevant time customary in instruments evidencing or
securing non-recourse Indebtedness.
 
     "Person" means any individual, corporation, partnership, joint venture,
incorporated or unincorporated association, joint-stock company, trust,
unincorporated organization or government or other agency or political
subdivision thereof or other entity of any kind.
 
     "Refinancing Indebtedness" means renewals, extensions, refinancings or
refundings of Indebtedness outstanding on the date of, or permitted to be
incurred by, the Indenture (including Refinancing Indebtedness, but excluding
any Indebtedness incurred pursuant to clauses (i), (vi) and (vii) of the
"Limitations on Additional Indebtedness" covenant), provided that, (A) in the
case of any refinancing or refunding of Indebtedness equal in right of payment
to the Debentures, such Refinancing Indebtedness is made equal in right of
payment or subordinate to the Debentures and, in the case of any refinancing or
refunding of Indebtedness subordinated to the Debentures, such Refinancing
Indebtedness is made subordinate to the Debentures to substantially the same
extent as such refinanced or refunded Indebtedness is subordinated to the
Debentures, (B) in either such case, such Refinancing Indebtedness does not
require the payment of all or a portion of the principal thereof (whether
pursuant to purchase, redemption, defeasance, retirement, sinking fund payment,
payment at stated maturity or otherwise, but excluding any retirement required
by virtue of acceleration of such Indebtedness upon an event of default
thereunder) prior to the final scheduled maturity of the Indebtedness being
refinanced or refunded, (C) the portion, if any, of such Refinancing
Indebtedness that is scheduled to mature on or prior to the maturity date of the
Debentures has a Weighted Average Life to Maturity at the time such Refinancing
Indebtedness is incurred that is equal to or greater than the Weighted Average
Life to Maturity of the portion of the Indebtedness being refunded, refinanced
or extended that is scheduled to mature on or prior to the maturity date of the
Debentures, (D) such Refinancing Indebtedness will be Refinancing Indebtedness
to the extent it is in an aggregate principal amount that is equal to or less
than the aggregate principal amount then outstanding under the Indebtedness
being refinanced or refunded and (E) if such Indebtedness being renewed,
extended, refinanced or refunded is Non-Recourse Indebtedness incurred pursuant
to clause (iv) of the Limitations on Additional Indebtedness covenant, only to
the extent such Refinancing Indebtedness is Non-Recourse Indebtedness and is
secured with only the assets as the Indebtedness being renewed, extended,
refinanced or refunded.
 
                                      S-34
<PAGE>   35
 
     "Released Asset Value" means the undepreciated and unamortized cost basis
of assets or property, or portion thereof, of the Company or a Restricted
Subsidiary which is released from an Excess Asset Lien (to the extent of the
release). The amount of the Released Asset Value is equal to the undepreciated
and unamortized cost basis of such assets or property (or relevant portion
thereof), at the time of the granting of the Excess Asset Lien, so released (to
the extent of the release).
 
     "Repurchasable" does not include redeemable.
 
     "Restricted Payment" means with respect to any Person, (i) the declaration
of any dividend or the making of any other payment or distribution of cash,
securities or other property or assets in respect of such Person's Capital Stock
(except that a dividend payable solely in Capital Stock (other than Disqualified
Stock) of such Person shall not constitute a Restricted Payment), (ii) any
payment on account of the purchase, redemption, retirement or other acquisition
for value of such Person's Capital Stock or any other payment or distribution
made in respect thereof, either directly or indirectly, (iii) any Investment in
(a) an Unrestricted Subsidiary necessary to fund operating expenses or (b) any
other Investment in an Unrestricted Subsidiary, (iv) any principal payment,
redemption, repurchase, defeasance or other acquisition or retirement of (a)
Excluded Debt or (b) Indebtedness of the Company or its subsidiaries which is
subordinated in right of payment to the Debentures prior to the scheduled
principal payment or scheduled maturity of such Indebtedness or (v) the grant of
an Excess Asset Lien; provided, however, that with respect to the Company and
its subsidiaries, Restricted Payments shall not include (a) any payment
described in clause (i) or (ii) above made to the Company or any of its Wholly
Owned Restricted Subsidiaries by any of the Company's subsidiaries, (b) any
underwritten call of Indebtedness of the Company which is convertible into
Capital Stock (other than Disqualified Stock) but only to the extent the Company
is not required to make any redemption or principal payments in respect of
Indebtedness subject to such underwritten call (other than redemption and
principal payments which are covered by the net proceeds received by the Company
from a concurrent sale of Capital Stock (other than Disqualified Stock) to the
underwriters or standby purchasers participating in such underwritten call) or
(c) the exchange by the Company of Capital Stock (other than Disqualified Stock)
for Indebtedness of the Company or a Restricted Subsidiary in an exchange offer,
but only to the extent the exchange is solely for such Capital Stock.
 
     "Restricted Subsidiaries" means each of the subsidiaries of the Company
which is not, as of the determination date, an Unrestricted Subsidiary of the
Company.
 
     "Subsidiary" of any Person means (i) any corporation of which at least a
majority of the aggregate voting power of all classes of the Common Equity is
owned by such Person directly or through one or more other subsidiaries of such
Person and (ii) any entity other than a corporation in which such Person,
directly or indirectly, owns at least a majority of the Common Equity of such
entity.
 
     "Sun City Las Vegas" means the Company's age-restricted active adult
community development located in Las Vegas, Nevada, as its geographic boundaries
existed at February 11, 1994.
 
     "Sun City Palm Desert" means the Company's age-restricted active adult
community development located in the Coachella Valley in Southern California
(formerly known as Sun City Palm Springs), as its geographic boundaries existed
at February 11, 1994.
 
     "Sun City Tucson" means the Company's age-restricted active adult community
development located in Pima County, Arizona, as its geographic boundaries
existed at February 11, 1994.
 
     "Sun City West" means the Company's age-restricted active adult community
development located in Maricopa County, Arizona, as its geographic boundaries
existed at February 11, 1994.
 
     "United States Government Obligations" means obligations for which the full
faith and credit of the United States of America is pledged and which are not
callable at the issuer's option.
 
     "Unrestricted Subsidiaries" means each of the subsidiaries of the Company
so designated by a resolution adopted by the Company's Board of Directors and
whose creditors have no direct or indirect recourse (including, but not limited
to, recourse with respect to the payment of principal or interest on
Indebtedness of such subsidiary) to the Company or a Restricted Subsidiary
(except to the extent the Investment made by the
                                      S-35
<PAGE>   36
 
Company in the Unrestricted Subsidiary is (a) permitted under the Limitations on
Restricted Payments covenant and (b) is a Guarantee); provided, however, that
the Board of Directors of the Company will be prohibited from designating any
subsidiary which holds, directly or indirectly, any of the assets of Sun City
West, Sun City Tucson, Sun City Las Vegas or Sun City Palm Desert as an
Unrestricted Subsidiary. The Board of Directors of the Company may designate an
Unrestricted Subsidiary to be a Restricted Subsidiary, provided that (i) any
such redesignation shall be deemed to be an incurrence by the Company and its
Restricted Subsidiaries of the Indebtedness (if any) of such redesignated
subsidiary for purposes of the Limitations on Additional Indebtedness covenant
in the Indenture as of the date of such redesignation and (ii) immediately after
giving effect to such redesignation and the incurrence of any such additional
Indebtedness, the Company and its Restricted Subsidiaries could incur $1 of
additional Indebtedness pursuant to the Consolidated Fixed Charge Coverage Ratio
in the Limitations on Additional Indebtedness covenant in the Indenture. Subject
to the foregoing, the Board of Directors of the Company also may designate any
Restricted Subsidiary to be an Unrestricted Subsidiary, provided that (i) all
previous Investments by the Company and its Restricted Subsidiaries shall be
deemed to be Restricted Payments at the time of such designation and shall
reduce the amount available for Restricted Payments under the Limitations on
Restricted Payments covenant in the Indenture and (ii) immediately after giving
effect to such designation and reduction of amounts available for Restricted
Payments under the Limitations on Restricted Payments covenant in the Indenture,
the Company and its Restricted Subsidiaries could incur $1 of additional
Indebtedness pursuant to the Consolidated Fixed Charge Coverage Ratio in the
Limitations on Additional Indebtedness described above. Any such designation or
redesignation by the Board of Directors shall be evidenced to the Trustee by the
filing with the Trustee of a certified copy of the Resolution of the Company's
Board of Directors giving effect to such designation or redesignation and an
officer's certificate certifying that such designation or redesignation complied
with the foregoing conditions and setting forth the underlying calculations of
such certificate.
 
     "Weighted Average Life to Maturity" means, when applied to any Indebtedness
or portion thereof (if applicable), at any date, the number of years obtained by
dividing (i) the then outstanding principal amount of such Indebtedness or
portion thereof (if applicable) into (ii) the sum of the products obtained by
multiplying (a) the amount of each remaining installment, sinking fund, serial
maturity or other required payment of principal, including payment at final
maturity, in respect thereof, by (b) the number of years (calculated to the
nearest one-twelfth) that will elapse between such date and the making of such
payment.
 
     "Wholly Owned Restricted Subsidiary" of the Company means a Restricted
Subsidiary of the Company of which 100 percent of the Common Equity (except for
directors' qualifying shares or certain minority interests owned by other
Persons solely due to local law requirements that there be more than one
stockholder, but which interest is not in excess of what is required for such
purpose) is owned directly by the Company or through one or more other Wholly
Owned Restricted Subsidiaries of the Company.
 
     "Wholly Owned Subsidiary" of any Person means (i) a subsidiary of which 100
percent of the Common Equity (except for directors' qualifying shares or certain
minority interests owned by other Persons solely due to local law requirements
that there be more than one stockholder, but which interest is not in excess of
what is required for such purpose) is owned directly by such Person or through
one or more other Wholly Owned Subsidiaries of such Person or (ii) any entity
other than a corporation in which such Person, directly or indirectly, owns all
of the Common Equity.
 
BOOK-ENTRY, DELIVERY AND FORM
 
     Except as set forth below, the Debentures will be issued in the form of one
or more Registered Debentures in Global form (the "Global Debentures"). Each
Global Debenture will be deposited on the date of the closing of the sale of the
Debentures (the "Closing Date") with, or on behalf of DTC, as depositary (the
"Depositary"), and registered in the name of Cede & Co., as nominee of the
Depositary.
 
     DTC is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" within the meaning of the New York Banking Law, a
member of the Federal Reserve System, a "clearing corporation" within the
meaning of the New York Uniform Commercial Code and a "clearing
 
                                      S-36
<PAGE>   37
 
agency" registered pursuant to the provisions of Section 17A of the Exchange
Act. DTC holds securities that its participants ("Participants"), including
Morgan Guaranty Trust Company of New York, Brussels office, as operator of the
Euroclear system ("Euroclear"), and Cedel Bank, societe anonyme ("Cedel"),
deposit with DTC. DTC also facilitates the settlement among Participants of
securities transactions, such as transfers and pledges, in deposited securities
through electronic computerized book-entry changes in Participants' accounts,
thereby eliminating the need for physical movement of securities certificates.
Direct Participants include securities brokers and dealers, banks, trust
companies, clearing corporations and certain other organizations ("Direct
Participants"). DTC is owned by a number of its Direct Participants including
securities brokers and dealers, banks and trust companies that clear through or
maintain a custodial relationship with a Direct Participant, either directly or
indirectly ("Indirect Participants"). The rules applicable to DTC and its
Participants are on file with the Securities and Exchange Commission.
 
     Euroclear and Cedel hold securities for participating organizations and
facilitate the clearance and settlement of securities transactions between their
respective participants through electronic book-entry changes in accounts of
such participants. Euroclear and Cedel provide to their participants, among
other things, services for safekeeping, administration, clearance and settlement
of internationally traded securities and securities lending and borrowing.
Euroclear and Cedel interface with domestic securities markets. Euroclear and
Cedel participants are financial institutions such as underwriters, securities
brokers and dealers, banks, trust companies and certain other organizations.
Indirect access to Euroclear and Cedel is also available to others such as
banks, brokers, dealers and trust companies that clear through or maintain a
custodian relationship with a Euroclear or Cedel participant, either directly or
indirectly.
 
     Each person owning a beneficial interest must rely on the procedures of
DTC, Euroclear and Cedel and, if such person is an Indirect Participant in DTC,
on the procedures of the Participant in DTC through which such person owns its
interest, to exercise any rights and remedies of a Holder under the Indenture.
 
     The Company expects that pursuant to procedures established by the
Depositary (i) upon deposit of the Global Debentures, the Depositary will credit
the accounts of participants designated by the Underwriters with an interest in
the applicable Global Debentures and (ii) ownership of the Debentures evidenced
by the Global Debentures will be shown on, and transfer of ownership thereof
will be effected only through, records maintained by the Depositary (with
respect to the interests of Participants), the Participants and the Indirect
Participants. Transfers between participants in Euroclear and Cedel will be
effected in the ordinary way in accordance with their respective rules and
operating procedures. The laws of some states require that certain persons take
physical delivery in definitive form of securities that they own and that
security interests in negotiable instruments can only be perfected by delivery
of certificates representing the instruments. Consequently, the ability to
transfer Debentures evidenced by the Global Debentures will be limited to such
extent.
 
     So long as the Depositary or its nominee is the registered owner of a
Debenture, the Depositary or such nominee, as the case may be, will be
considered the sole owner or holder of the Debentures represented by the Global
Debentures for all purposes under the Indenture. Except as provided below,
owners of beneficial interests in a Global Debenture will not be entitled to
have Debentures represented by such Global Debenture registered in their names,
will not receive or be entitled to receive physical delivery of Debentures in
certificated form ("Certificated Debentures"), and will not be considered the
owners or holders thereof under the Indenture for any purpose, including with
respect to the giving of any directions, instructions or approvals to the
Trustee thereunder. As a result, the ability of a person having beneficial
interest in Debentures represented by a Global Debenture to pledge such interest
to persons or entities that do not participate in the Depositary's system, or to
otherwise take actions with respect to such interest, may be affected by the
lack of a physical certificate evidencing such interest.
 
     Neither the Depositary nor Cede & Co. will consent or vote with respect to
the Debentures. The Company understands that under its usual procedures, DTC
mails an omnibus proxy (an "Omnibus Proxy") to its Participants as soon as
possible after the applicable record date. The Omnibus Proxy assigns Cede &
Co.'s and Euroclear and Cedel's consenting or voting rights to those Direct
Participants to whose accounts the
 
                                      S-37
<PAGE>   38
 
Debentures are credited on the applicable record date (to be identified in a
listing attached to the Omnibus Proxy).
 
     Neither the Company nor the Trustee will have any responsibility or
liability for any aspect of the records relating to or payments made on account
of Debentures by the Depositary, or for maintaining, supervising or reviewing
any records of the Depositary relating to such Debentures.
 
     Payments with respect to the principal of, premium, if any, and interest
on, any Debenture represented by a Global Debenture registered in the name of
the Depositary or its nominee on the applicable record date will be payable by
the Trustee to, or at the direction of, the Depositary or its nominee in its
capacity as the registered holder of the Global Debenture representing such
Debentures under the Indenture. The Company understands that the Depositary's
practice is to credit Direct Participants' accounts on the relevant payment date
in accordance with their respective holdings shown on the Depositary's records
unless the Depositary has reason to believe that it will not receive payment on
such payment date. Payments by Participants to beneficial owners will be
governed by standing instructions and customary practices, as is the case with
securities for the accounts of customers in bearer form or registered in
"street-name," and will be the responsibility of such Participant and not of the
Depositary or the Company, subject to any statutory or regulatory requirements
as may be in effect from time to time. Payment of principal, premium, if any,
and interest to the Depositary is the responsibility of the Company or the
Trustee. Disbursement of such payments to Direct Participants is the
responsibility of the Depositary, and disbursement of such payments to the
beneficial owners is the responsibility of Direct and Indirect Participants.
Distribution with respect to ownership of interests held through Euroclear or
Cedel will be credited to the cash accounts of Euroclear participants or Cedel
participants in accordance with the relevant system's rules and procedures, to
the extent received by the Depositary.
 
     Under the terms of the Indenture, the Company and the Trustee may treat the
persons in whose names the Debentures, including the Global Debentures, are
registered as the owners thereof for the purpose of receiving such payments and
for any and all other purposes whatsoever. Consequently, neither the Company nor
the Trustee has or will have any responsibility or liability for the payment of
such amounts to beneficial owners of Debentures (including principal, premium,
if any, or interest), or to immediately credit the accounts of the relevant
Participants with such payment, in amounts proportionate to their respective
holdings in principal amount of beneficial interests in the Global Debenture as
shown on the records of the Depositary. Payments by the Participants and the
Indirect Participants to the beneficial owners of Debentures will be governed by
standing instructions and customary practice and will be the responsibility of
the Participants or the Indirect Participants.
 
SAME-DAY FUNDS SETTLEMENT AND PAYMENT
 
     Settlement for the Debentures will be made by the Underwriters in
immediately available funds. Payments in respect of the Debentures represented
by the Global Debentures (including principal, premium, if any, and interest)
will be made in immediately available funds to the accounts specified by the
Depositary. With respect to Debentures represented by Certificated Debentures, a
Paying Agent (initially, the Trustee) will make all payments of principal,
premium, if any, and interest, by mailing a check to the registered address of
each holder of such Debentures. The Debentures will trade in the Depositary's
Same-Day Funds Settlement System until maturity, or until the Debentures are
issued in certificated form, and secondary market trading activity in the
Debentures (other than through Euroclear and Cedel) will therefore be required
by the Depositary to settle in immediately available funds. No assurance can be
given as to the effect, if any, of settlement in immediately available funds on
trading activity in the Debentures.
 
     Investors electing to own their interests through Euroclear or Cedel
accounts will follow the settlement procedures applicable to conventional
eurobonds in registered form. Interests will be credited to the securities
custody accounts of Euroclear and Cedel holders on the business day following
the settlement date against payment for value on the settlement date.
 
     The information above concerning the Depositary, Euroclear and Cedel and
the Depositary's, Euroclear's and Cedel's book-entry systems has been obtained
from sources that the Company believes to be reliable. The
                                      S-38
<PAGE>   39
 
Company will have no responsibility for the performance by the Depositary, its
Participants or its Indirect Participants, or Euroclear, Cedel and their
participants, of their respective obligations as described herein or under the
rules and procedures governing their respective operations.
 
CERTIFICATED DEBENTURES
 
     If (i) the Company notifies the Trustee in writing that the Depositary is
no longer willing or able to act as a depositary and the Company is unable to
locate a qualified successor within 90 days, (ii) the Company, at its option,
notifies the Trustee in writing that it elects to cause the issuance of
Debentures in certificated form under the Indenture or (iii) if an Event of
Default has occurred and is continuing, then, upon surrender by the Depositary
of the applicable Global Debentures, Certificated Debentures will be issued to
each person that the Depositary identifies as the beneficial owner of the
Debentures represented by such Global Debentures. In addition, subject to
certain conditions, any person having a beneficial interest in a Global
Debenture may, upon request to the Trustee, exchange such beneficial interest
for Debentures in the form of Certificated Debentures. Upon any such issuance,
the Trustee is required to register such Certificated Debentures in the name of
such person or persons (or the nominee of any thereof), and cause the same to be
delivered thereto.
 
     Neither the Company nor the Trustee shall be liable for any delay by the
Depositary or any Participant or Indirect Participant in identifying the
beneficial owners of Debentures, and the Company and the Trustee may
conclusively rely on, and shall be protected in relying on, instructions from
the Depositary for all purposes (including with respect to the registration and
delivery, and the respective principal amounts, of the Debentures to be issued).
 
                                      S-39
<PAGE>   40
 
                          CERTAIN FEDERAL TAX MATTERS
 
     The following is a general discussion of certain United States federal tax
consequences of the acquisition, ownership and disposition of a Debenture by an
initial purchaser of Debentures that, for United States federal income tax
purposes, is not a "United States person" (a "Non-U.S. Holder"). For purposes of
this discussion, a "United States person" means a citizen or resident of the
United States, a corporation, partnership or other entity created or organized
in the United States or under the laws of the United States or of any political
subdivision thereof, or an estate or trust whose income is includible in gross
income for United States federal income tax purposes regardless of its source.
This discussion does not consider any specific facts or circumstances that may
apply to a particular Non-U.S. Holder and does not deal with special situations,
such as those of dealers in securities or currencies, financial institutions,
life insurance companies or persons holding Debentures as a part of a hedging,
straddle or synthetic security transaction. The discussion below is based upon
the provisions of the Internal Revenue Code of 1986, as amended (the "Code"),
and Regulations, rulings and judicial decisions published thereunder as of the
date hereof, which authorities may be repealed, revoked or modified, possibly on
a retroactive basis, so as to result in United States federal tax consequences
different from those discussed below. ALL PERSONS CONSIDERING THE PURCHASE,
OWNERSHIP OR DISPOSITION OF DEBENTURES SHOULD CONSULT THEIR TAX ADVISORS
CONCERNING THE UNITED STATES FEDERAL TAX CONSEQUENCES IN LIGHT OF THEIR
PARTICULAR SITUATIONS AS WELL AS ANY CONSEQUENCES ARISING UNDER THE LAWS OF ANY
OTHER TAXING JURISDICTION.
 
PAYMENTS OF INTEREST
 
     A Non-U.S. Holder will not be subject to United States federal income or
withholding tax on payments of principal or interest on a Debenture, unless such
Non-U.S. Holder is a direct or indirect ten percent or greater shareholder of
the Company, a controlled foreign corporation related to the Company or a bank
receiving interest described in section 881(c)(3)(a) of the Code. To qualify for
the exemption from taxation, the last United States payor in the chain of
payment prior to payment to a Non-U.S. Holder (the "Withholding Agent") must
have received in the year in which a payment of interest or principal occurs, or
in either of the two preceding calendar years, a statement that (a) is signed by
the beneficial owner of the Debenture under penalties of perjury, (b) certifies
that such owner is a Non-U.S. Holder and (c) provides the name and address of
the beneficial owner. The statement may be made on an Internal Revenue Service
("IRS") Form W-8 or IRS Form W-8BEN or a substantially similar form, and the
beneficial owner must inform the Withholding Agent of any change in the
information on the statement within 30 days of such change. If the Debenture is
held through a securities clearing organization or certain other financial
institutions, the organization or institution may provide a signed statement or
IRS Form W-8IMY to the Withholding Agent. However, in such case, the signed
statement must be accompanied by a copy of the IRS Form W-8 or IRS Form W-8BEN,
or the substitute form provided by the beneficial owner to the organization or
institution.
 
     If payments of interest to a non-U.S. Holder are effectively connected with
the conduct by such Holder of a trade or business in the United States, such
payments will be subject to United States federal income tax on a net basis at
the rates applicable to United States persons generally (and, with respect to
corporate Holders, may also be subject to a 30 percent branch profits tax).
Payments that are subject to United States federal income tax on a net basis
will not be subject to United States federal withholding tax so long as the
Holder provides the Company or a Paying Agent with a properly executed IRS Form
4224 or IRS Form W-8ECI.
 
SALE, EXCHANGE OR REDEMPTION OF DEBENTURES
 
     Generally, a Non-U.S. Holder will not be subject to United States federal
income or withholding tax on any amount which constitutes capital gain upon
retirement or disposition of a Debenture, unless (a) such Holder is an
individual who is present in the United States for 183 days or more in the
taxable year of disposition and either (i) such individual has a "tax home" (as
defined in Section 911(d)(3) of the Code) in the United States (unless such gain
is attributable to a fixed place of business in a foreign country maintained by
such individual and has been subject to foreign tax of at least ten percent) or
(ii) the gain is attributable to
                                      S-40
<PAGE>   41
 
an office or other fixed place of business maintained by such individual in the
United States or (b) the gain is effectively connected with the conduct of a
trade or business in the United States by the Non-U.S. Holder.
 
     If a Non-U.S. Holder of a Debenture is engaged in a trade or business in
the United States and if the gain realized on the sale, exchange, or other
disposition of the Debenture is effectively connected with the conduct of such
trade or business, the Non-U.S. Holder will generally be subject to regular
United States federal income tax on such gain in the same manner and at the
rates applicable to United States persons generally (and, with respect to
corporate Holders, may also be subject to a 30 percent branch profits tax). Such
a Holder will be required to provide to the Company or a Paying Agent a properly
executed IRS Form 4224 or IRS Form W-8ECI in order to claim an exemption from
withholding tax.
 
FEDERAL ESTATE TAX
 
     Subject to applicable estate tax treaty provisions, Debentures will not be
includable in the estate of a Non-U.S. Holder unless the individual is a direct
or indirect ten percent or greater shareholder of the Company or, at the time of
such individual's death, payments in respect of the Debentures would have been
effectively connected with the conduct by such individual of a trade or business
in the United States.
 
INFORMATION REPORTING AND BACKUP WITHHOLDING
 
     No information reporting or backup withholding will be required with
respect to payments made by the Company or any paying agent to Non-U.S. Holders
if the statement described under "Payments of Interest" has been received and
the payor does not have actual knowledge that the beneficial owner is a United
States person. However, interest paid to a Non-U.S. Holder will be required to
be reported annually on IRS Form 1042-S. If any payments of principal and
interest are made to the beneficial owner by or through the foreign office of a
foreign custodian, foreign nominee or the foreign agent of such beneficial
owner, or if the foreign office of a foreign "broker" (as defined in applicable
Treasury Regulations) pays the proceeds of the sale of a Debenture to the seller
thereof, backup withholding information reporting will not apply. Information
reporting requirements (but not backup withholding) will apply, however, to a
payment by a foreign office of a broker that is a United States person, that
derives 50 percent or more of its gross income for certain periods from the
conduct of a trade or business in the United States or that is a "controlled
foreign corporation" (generally, a foreign corporation controlled by certain
United States shareholders) with respect to the United States unless the broker
has documentary evidence in its records that the holder is a Non-U.S. Holder and
certain other conditions are met or the Holder otherwise establishes an
exemption. Payment by a United States office of a broker is subject to both
backup withholding at a rate of 31 percent and information reporting unless the
holder certifies under penalties of perjury that it is a Non-U.S. Holder or
otherwise establishes an exemption.
 
     Backup withholding is not an additional tax. Any amounts withheld under the
backup withholding rules will be refunded or credited against the Non-U.S.
Holder's United States federal income tax liability, provided that the required
information is furnished to the IRS.
 
     The Treasury Department issued final Treasury Regulations governing
information reporting and the certification procedures regarding withholding and
backup withholding on certain amounts paid to non-United States persons after
December 31, 1999. Such Regulations, among other things, may change the
certification procedures relating to the receipt by intermediaries of payments
on behalf of a beneficial owner of a Debenture. Prospective investors should
consult their tax advisors regarding the effect, if any, of such new Treasury
Regulations on an investment in the Debentures.
 
     THE FOREGOING IS INTENDED ONLY AS A SUMMARY OF CERTAIN UNITED STATES
FEDERAL INCOME TAX ASPECTS RELEVANT TO NON-U.S. HOLDERS AND IS NOT A SUBSTITUTE
FOR CAREFUL TAX PLANNING AND ADVICE BASED UPON THE INDIVIDUAL CIRCUMSTANCES OF
THE HOLDER.
 
                                      S-41
<PAGE>   42
 
                                  UNDERWRITING
 
     Subject to the terms and conditions set forth in the Underwriting
Agreement, the Company has agreed to sell to each of the Underwriters named
below, and each of the Underwriters has severally agreed to purchase, the
principal amounts of the Debentures set forth opposite its name below:
 
<TABLE>
<CAPTION>
                                                               PRINCIPAL
UNDERWRITER                                                      AMOUNT
- -----------                                                   ------------
<S>                                                           <C>
Warburg Dillon Read LLC.....................................  $
Goldman, Sachs & Co.........................................
NationsBanc Montgomery Securities LLC.......................
                                                              ------------
          Total.............................................  $200,000,000
                                                              ============
</TABLE>
 
     Under the terms and conditions of the Underwriting Agreement, the
Underwriters have agreed to take and pay for all of the Debentures, if any are
taken.
 
     The Underwriters severally propose to offer the Debentures directly to the
public at the price to the public set forth on the cover page hereof, or at such
price less a concession not in excess of      % of the principal amount of the
Debentures on sales to certain dealers. The Underwriters may allow, and such
dealers may reallow, a concession of not in excess of      % of the principal
amount of the Debentures on sales to certain other dealers. The offering of the
Debentures is made for delivery when, as and if accepted by the Underwriters and
is subject to prior sale and to withdrawal, cancellation or modification of the
offer without notice. The Underwriters reserve the right to reject any order for
the purchase of Debentures. After the public offering, the offering price and
concession may be changed by the Underwriters.
 
     The Company has agreed to indemnify the Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933, as amended,
or to contribute to payments that the Underwriters may be required to make in
respect thereof.
 
     Warburg Dillon Read LLC and its predecessors have from time to time
performed, and may in the future from time to time perform, investment banking
services for the Company and has from time to time acted, and may in the future
from time to time act, as underwriters for the Company. Affiliates of
NationsBanc Montgomery Securities LLC are the agent bank and a lender under the
Credit Facility, a lender under the Company's short-term lines of credit and
provide other financial services to the Company. A predecessor of Warburg Dillon
Read LLC was the sole underwriter in the Company's May 1998 offering of $200
million of senior subordinated debentures. Each of the Underwriters may, for
their own account and the account of their respective customers, hold a net long
or net short position in the Company's debt or equity securities from time to
time.
 
     In connection with the sale of the Debentures, the Underwriters or certain
of their affiliates may engage in transactions that stabilize, maintain or
otherwise affect the price of the Debentures. Specifically, the Underwriters may
bid for, and purchase, the Debentures in the open market to cover short
positions and may make such bids and purchases to stabilize the price of the
Debentures. Any of these activities may stabilize or maintain the market price
of the Debentures above independent market levels. No representation is made
that the Underwriters will engage in such activities, or that such activities,
once commenced, will not be discontinued without notice.
 
     The Company and the Underwriters has each represented and agreed that (a)
it has not offered or sold, and for a period of six months after the date of
issue of the Debentures will not offer or sell, any Debentures to persons in the
United Kingdom except to persons whose ordinary activities involve them in
acquiring, holding, managing or disposing of investments (as principal or agent)
for the purposes of their businesses or otherwise in circumstances which do not
constitute an offer to the public in the United Kingdom for the purposes of the
Public Offers of Securities Regulations 1995, (b) it has complied and will
comply with all applicable provisions of the Public Offers of Securities
Regulations 1995 and the Financial Services Act 1986 with respect to anything
done by it in relation to the Debentures in, from or otherwise involving the
United Kingdom and (c) it has only issued or passed on and will only issue or
pass on in the United Kingdom any document received by it in connection with the
issue or sale of Debentures to a person who is of a kind described in Article
11(3) of the Financial Services Act of 1986 (Investment Advertisements)
(Exemptions) Order 1996 (as amended) or is a person to whom the document may
otherwise lawfully be issued or passed on.
 
                                      S-42
<PAGE>   43
 
                             CERTAIN LEGAL MATTERS
 
     Gibson, Dunn & Crutcher LLP has rendered an opinion (filed as an exhibit to
the Registration Statement) with respect to the validity of the Debentures
covered by the Registration Statement. See "Certain Legal Matters" in the
accompanying Prospectus. Certain legal matters with respect to the Debentures
will be passed upon for the Underwriters by Skadden, Arps, Slate, Meagher & Flom
LLP, Los Angeles, California. Each of Gibson, Dunn & Crutcher LLP and Skadden,
Arps, Slate, Meagher & Flom LLP have from time to time represented the Company,
and may in the future from time to time represent the Company, in connection
with various matters.
 
                                      S-43
<PAGE>   44
 
PROSPECTUS                                                      OCTOBER 22, 1998
- --------------------------------------------------------------------------------
 
                                  $250,000,000
 
                          [DEL WEBB CORPORATION LOGO]
   Debt Securities, Preferred Stock, Common Stock and Stock Purchase Warrants
- --------------------------------------------------------------------------------
 
Del Webb Corporation (the "Company") may offer and issue from time to time its:
debt securities (the "Debt Securities") in one or more series, consisting of
debentures, notes or other evidences of indebtedness and having such prices and
terms as are determined at the time of sale; preferred stock, which may be
issued in one or more series (the "Preferred Stock"); common stock (the "Common
Stock"); and Stock Purchase Warrants to purchase Preferred Stock or Common Stock
(the "Warrants" and, together with the Debt Securities, Preferred Stock and
Common Stock, the "Securities"). The Securities may be issued as Units (the
"Units") and in any combination, the Debt Securities may or may not be
convertible into Preferred Stock or Common Stock and the Preferred Stock may or
may not be convertible into Common Stock or exchangeable for Debt Securities.
 
The accompanying Prospectus Supplement sets forth: the ranking of the Debt
Securities covered thereby as senior, senior subordinated or subordinated
(including junior subordinated) and the specific designation, aggregate
principal amount, purchase price, maturity, interest rate (or manner of
calculation thereof), time of payment of interest (if any), right to defer
interest (if any), convertibility (if any) and, if applicable, Securities into
which convertible and conversion price and any other specific terms of the Debt
Securities; the rights, privileges and preferences of the Preferred Stock
covered thereby, including whether and on what terms such Preferred Stock may be
convertible into Common Stock or exchangeable for Debt Securities, and whether
the Company has elected to offer any Preferred Stock in the form of depositary
shares; the Preferred Stock or Common Stock for which any Warrants covered
thereby will be exercisable and the exercise price; whether the Securities
covered thereby will be issued in Units and, if so, the Securities which are
part thereof; whether the Securities covered thereby are listed on a securities
exchange; and the name of and compensation to each dealer, underwriter or agent
(if any) involved in the sale of the Securities covered thereby.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE COMMISSION OR
ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
Prior to issuance there will have been no market for the Debt Securities,
Preferred Stock or Warrants, and there can be no assurance that a secondary
market for the Debt Securities, Preferred Stock or Warrants will develop. This
Prospectus may not be used to consummate sales of Securities unless accompanied
by a Prospectus Supplement. The Securities may be offered through one or more
different plans of distribution, including offerings through underwriters. See
"Plan of Distribution."
<PAGE>   45
 
     IN CONNECTION WITH THE OFFERINGS OF THE DEBT SECURITIES, PREFERRED STOCK,
COMMON STOCK OR WARRANTS, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT TRANSACTIONS
WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE DEBT SECURITIES, PREFERRED
STOCK, COMMON STOCK OR WARRANTS, OR ANY OF THEM, AT LEVELS ABOVE THOSE WHICH
MIGHT OTHERWISE PREVAIL IN THE OPEN MARKET. SUCH TRANSACTIONS MAY BE EFFECTED ON
THE NEW YORK STOCK EXCHANGE, IN THE OVER-THE-COUNTER MARKET OR OTHERWISE. SUCH
STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
                             AVAILABLE INFORMATION
 
     The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement (together with all amendments and
exhibits thereto, the "Registration Statement") under the Securities Act of
1933, as amended (the "Securities Act"), with respect to the Debt Securities,
Preferred Stock, Common Stock and Warrants. This Prospectus, which constitutes
part of the Registration Statement, does not contain all of the information set
forth in the Registration Statement, certain parts of which are omitted in
accordance with the Rules and Regulations of the Commission. For further
information with respect to the Company, reference is made to the Registration
Statement.
 
     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports, proxy statements and other information with the
Commission. The Registration Statement, as well as such reports, proxy
statements and other information filed by the Company, may be inspected and
copied (at prescribed rates) at the public reference facilities maintained by
the Commission at 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549 and
at the Commission's Regional Offices located at Northwestern Atrium Center,
Suite 1400, 500 West Madison Street, Chicago, Illinois 60661 and 7 World Trade
Center, 13th Floor, New York, New York 10048. In addition, such reports, proxy
statements and other information concerning the Company may also be inspected at
the offices of the New York Stock Exchange, 20 Broad Street, New York, New York
10005 and the Pacific Exchange, 115 Sansome Street, Suite 1104, San Francisco,
California 94104. Copies of reports, proxy statements and other information
electronically filed with the Commission by the Company may be inspected by
accessing the Commission's World Wide Web site at http://www.sec.gov.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The Company's Annual Report on Form 10-K for its fiscal year ended June 30,
1998, which has been filed with the Commission, is incorporated in this
Prospectus by reference. All documents filed by the Company pursuant to Sections
13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this
Prospectus and prior to the termination of the offering made hereby are
incorporated by reference in this Prospectus and made a part hereof from the
date such documents are filed.
 
     Any statement contained herein or in a document incorporated or deemed to
be incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement contained herein,
in the Prospectus Supplement or in any subsequently filed document that also is
or is deemed to be incorporated by reference herein modifies or supersedes such
statement. Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Prospectus.
 
     The Company will provide without charge to each person to whom a copy of
this Prospectus is delivered, upon the written or oral request of such person, a
copy of each document incorporated herein by reference (not including the
exhibits to those documents, unless the exhibits are specifically incorporated
by reference therein or herein). Requests for such copies should be directed to:
Del Webb Corporation, 6001 North 24th Street, Phoenix, Arizona 85016, Attention:
Secretary. Telephone requests may be directed to (602) 808-8000.
 
                                        2
<PAGE>   46
 
                                  THE COMPANY
 
     Del Webb Corporation develops residential communities ranging from
smaller-scale, non-amenitized communities within its conventional homebuilding
operations to large-scale, master-planned communities with extensive amenities.
The Company currently conducts its operations in the states of Arizona,
California, Florida, Illinois, Nevada, South Carolina and Texas.
 
     The Company's primary activities involve the development of large-scale,
master-planned communities with extensive amenities for active adults age 55 and
over. The Company is one of the nation's leading developers of such
age-qualified active adult communities. It has extensive experience in the
active adult community business, having built and sold more than 60,000 homes at
ten Sun City communities over the past 38 years. The Company designs, develops
and markets these communities, controlling all phases of the master plan
development process from land selection through the construction and sale of
homes. Within its communities, the Company is usually the exclusive developer of
homes.
 
     The Company was incorporated in 1946 in Arizona and reincorporated in 1994
in Delaware. The Company's principal executive offices are located at 6001 North
24th Street, Phoenix, Arizona 85016 and its telephone number is (602) 808-8000.
The Company conducts substantially all of its activities through subsidiaries
and, as used in this Prospectus and the accompanying Prospectus Supplement, the
term the "Company" includes Del Webb Corporation and its subsidiaries unless the
context indicates otherwise.
 
                                USE OF PROCEEDS
 
     Unless otherwise set forth in the accompanying Prospectus Supplement, the
net proceeds from the sale of the Securities will be used to reduce outstanding
balances under the Company's revolving credit facility, to fund land
acquisitions and development of new projects and for general corporate purposes.
Amounts so repaid under the revolving credit facility may be reborrowed in the
future.
 
                CONSOLIDATED RATIO OF EARNINGS TO FIXED CHARGES
 
     The following table sets forth the consolidated ratio of earnings to fixed
charges for the Company for the periods indicated.
 
<TABLE>
<CAPTION>
                                                              FISCAL YEAR ENDED JUNE 30,
                                                       ----------------------------------------
                                                       1994     1995     1996    1997     1998
                                                       -----    -----    ----    -----    -----
<S>                                                    <C>      <C>      <C>     <C>      <C>
Ratio of earnings to fixed charges (unaudited).......  1.30x    1.59x     (1)    2.09x    1.79x
</TABLE>
 
- ---------------
(1) Earnings were inadequate to cover fixed charges by $21.6 million due to a
    $65.0 million non-cash loss from impairment of southern California real
    estate inventories incurred in connection with the Company's adoption of
    Statement of Financial Accounting Standards No. 121, Accounting for the
    Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed Of.
    See Note 12 to the Company's Consolidated Financial Statements included in
    its annual report on Form 10-K for the fiscal year ended June 30, 1996.
 
     The ratio of earnings to fixed charges is calculated by dividing earnings
by fixed charges. For this purpose "earnings" means earnings (loss) from
continuing operations before income taxes plus (a) fixed charges and interest
amortized to cost of sales minus (b) interest incurred. "Fixed charges" means
total interest incurred, whether capitalized or expensed (including the portion
of rent expense representative of interest costs), plus (i) debt-related fees
and (ii) amortization of deferred financing costs.
 
                                        3
<PAGE>   47
 
                         DESCRIPTION OF DEBT SECURITIES
 
     The Debt Securities will constitute senior, senior subordinated or
subordinated (including, if applicable, junior subordinated) debt of the Company
and will be issued under a Senior Debt Indenture (the "Senior Debt Indenture"),
a Senior Subordinated Debt Indenture (the "Senior Subordinated Debt Indenture")
or a Subordinated Debt Securities Indenture (the "Subordinated Debt Indenture"),
in each case between the Company and a Trustee (the "Trustee"). The Senior Debt
Indenture, Senior Subordinated Debt Indenture and the Subordinated Debt
Indenture are sometimes referred to below individually as an "Indenture" and
collectively as the "Indentures." Unless otherwise stated in the Prospectus
Supplement, the Trustee under the first Indenture under which Debt Securities
will be issued will be Bank of Montreal Trust Company. (See "Concerning the
Trustee.") The Debt Securities offered by this Prospectus and the accompanying
Prospectus Supplement are referred to below as the "Offered Debt Securities." If
and to the extent set forth in the accompanying Prospectus Supplement, the
Offered Debt Securities will be convertible into Preferred or Common Stock of
the Company or issued as part of Units of Offered Debt Securities and other
Securities. If the Offered Debt Securities are to be issued as part of Units of
Debt Securities and other Securities or may be issued in exchange for Preferred
Stock, the Prospectus Supplement will describe any applicable material federal
income tax consequences.
 
     The following summaries of certain provisions of the Indentures and the
Debt Securities do not purport to be complete. Except to the extent set forth in
the Prospectus Supplement with respect to a particular issue of Debt Securities,
the Indentures are substantially identical, except for the provisions relating
to subordination, including the fact that senior subordinated Debt Securities
will rank senior to the subordinated Debt Securities.
 
GENERAL
 
     The Indenture for the Offered Debt Securities will not limit the amount of
additional indebtedness the Company or any of its subsidiaries may incur, except
as may be provided in the accompanying Prospectus Supplement. The Debt
Securities will be unsecured senior, senior subordinated or subordinated
obligations of the Company, as set forth in the accompanying Prospectus
Supplement.
 
     The Company is a holding company, which currently conducts its operations
through subsidiaries. In addition to the subordination described under
"Subordination of Senior Subordinated and Subordinated Debt Securities" below
and as may be described in the accompanying Prospectus Supplement, this
effectively subordinates the Debt Securities to all indebtedness (including
trade payables) of the Company's subsidiaries. Therefore, the Company's rights
and the rights of its creditors, including holders of Debt Securities, to
participate in the assets of any subsidiary upon the latter's liquidation or
recapitalization will be subject to the prior claims of the subsidiary's
creditors (including third persons who have the benefit of guarantees given by
the subsidiary), except to the extent the Company may itself be a creditor with
recognized claims against the subsidiary. However, in that case the claims of
the Company would still be effectively junior to any indebtedness of the
subsidiary to the extent the holders of that indebtedness are entitled to the
benefit of security interests in the assets of the subsidiary, as well as to any
indebtedness of that subsidiary which is senior to any debt or other claims held
by the Company. In addition, amounts which may from time to time be outstanding
under the Company's $450 million principal debt facility are guaranteed by
subsidiaries of the Company that hold substantially all of its consolidated
assets. The Debt Securities, including any senior Debt Securities, will not be
so guaranteed. As a result, the holders of that debt outstanding under the
Company's principal debt facility will have a claim against the assets of the
Company's subsidiaries before those assets are available to make payments due on
the Debt Securities.
 
     Also, because the Company is a holding company, it is dependent on
dividends or other distributions from its subsidiaries to make payments on its
indebtedness, including the Debt Securities. Such dividends or other
distributions to the Company may be subject to state law, which can restrict the
ability of a corporation to pay dividends or make other distributions to its
shareholders and which protect the rights of creditors of a corporation,
including third persons who have the benefit of guarantees given by the
corporation, in the event of improperly made dividends or distributions, as well
as to present or future contractual or regulatory
 
                                        4
<PAGE>   48
 
restrictions that could materially restrict the ability of the subsidiaries to
make such payments to the Company. The accompanying Prospectus Supplement
discloses, to the extent material to the Company, any contractual restrictions
on the ability of the subsidiaries of the Company to make dividends, loans or
advances to the Company that exist at the date of that Prospectus Supplement.
Except as may be described in the accompanying Prospectus Supplement, the
Indenture for the Offered Debt Securities will not restrict the Company's
ability to enter into contracts in the future that limit the ability of the
Company's subsidiaries to make dividends, loans or advances to it. Payments to
the Company from its subsidiaries also are contingent upon the earnings of such
subsidiaries and are subject to various business considerations, such as the
working capital needs of the subsidiaries.
 
     Reference is made to the accompanying Prospectus Supplement for the
following terms of and information relating to the Offered Debt Securities (to
the extent such terms are applicable to such Debt Securities): (a) the specific
designation, aggregate principal amount, purchase price and denomination; (b)
the date of maturity; (c) the interest rate or rates (or the method by which
such rate will be determined), if any; (d) the date from which interest will
accrue and dates on which any such interest will be payable; (e) the rights of
the Company to defer interest, if any; (f) the place or places where the
principal of, premium, if any, and interest, if any, on the Offered Debt
Securities will be payable; (g) whether the Offered Debt Securities are senior,
senior subordinated or subordinated (including junior subordinated) Debt
Securities; (h) any redemption, repayment or sinking fund provisions; (i) any
obligation of the Company to offer to purchase the Offered Debt Securities in
the event of a Change of Control (as defined) of the Company; (j) whether the
Offered Debt Securities are convertible into Preferred Stock or Common Stock and
the terms of the security into which they are convertible (see "Description of
Capital Stock"), the conversion price, other terms related to conversion and any
anti-dilution protections; (k) whether the Offered Debt Securities will be sold
as part of Units consisting of Offered Debt Securities and other Securities; (l)
any applicable material federal income tax consequences; and (m) any other
material specific terms of the Offered Debt Securities, including any material
additional events of default or covenants provided for with respect to the
Offered Debt Securities and any material terms that may be required by or
advisable under applicable laws or regulations.
 
     Debt Securities will bear interest at a fixed rate or a floating rate. Debt
Securities bearing no interest or interest at a rate that at the time of
issuance is below the prevailing market rate or as part of Units consisting of
Debt Securities and other Securities may be sold or deemed to be sold at a
discount below their stated principal amount. With respect to any Debt
Securities as to which the Company has the right to defer interest, the holders
of such Debt Securities may be allocated interest income for federal and state
income tax purposes without receiving equivalent, or any, interest payments. Any
material federal income tax considerations applicable to any such discounted
Debt Securities or to certain Debt Securities issued at par that are treated as
having been issued at a discount for federal income tax purposes will be
described in the Prospectus Supplement.
 
GLOBAL DEBT SECURITIES
 
     If any Debt Securities are represented by one or more Global Securities,
the applicable Prospectus Supplement will describe the terms of the depositary
arrangement with respect to such Global Securities.
 
SUBORDINATION OF SENIOR SUBORDINATED AND SUBORDINATED DEBT SECURITIES
 
     The senior subordinated and subordinated Debt Securities will be
subordinate and junior in right of payment, to the extent and in the manner to
be set forth in the Indenture, to all "Senior Debt" of the Company. Except to
the extent set forth in the accompanying Prospectus Supplement, the Indenture
for the Offered Debt Securities that are senior subordinated or subordinated
Debt Securities will define "Senior Debt" as all present or future
"Indebtedness" (defined below) created, incurred, assumed or, to the extent
described below, guaranteed by the Company (and all renewals, extensions or
refundings thereof), unless the instrument under which such Indebtedness is
created, incurred, assumed or guaranteed provides that such Indebtedness is not
senior or superior in right of payment to the Offered Debt Securities in
question; provided, however, that Senior Debt shall not include (a) any
Indebtedness of the Company to any of its subsidiaries,
                                        5
<PAGE>   49
 
(b) any trade payables of the Company or (c) except to the extent set forth or
referred to in the accompanying Prospectus Supplement, guarantees by the Company
of Indebtedness outstanding at the date hereof or that may be outstanding in the
future.
 
     Each Senior Subordinated Debt Indenture will provide that the Company will
not issue any Indebtedness that is subordinated in right of payment to any
Senior Debt of the Company and is senior in right of payment to the Debt
Securities covered by the Senior Subordinated Debt Indenture. No Subordinated
Debt Indenture will contain a similar provision. Except as may otherwise be
provided in the accompanying Prospectus Supplement, "Indebtedness" will be
defined in the Indenture for the Offered Debt Securities to mean any
indebtedness of a person, contingent or otherwise, in respect of borrowed money
(whether or not the recourse of the lender is to the whole of the assets of such
person or only to a portion thereof), evidenced by bonds, notes, debentures or
similar instruments or letters of credit or representing the balance deferred
and unpaid of the purchase price of any property or interest therein (except any
such balance that constitutes a trade payable), all capitalized lease
obligations and all direct or indirect obligations that arise as a result of
claims under or drawings pursuant to surety, performance, completion or
maintenance bonds.
 
     By reason of such subordination, in the event of dissolution, insolvency,
bankruptcy or other similar proceedings, upon any distribution of assets: (a)
holders of Senior Debt will be entitled to be paid in full before payments may
be made on senior subordinated and subordinated Debt Securities and the holders
of senior subordinated and subordinated Debt Securities will be required to pay
over their share of such distributions to the holders of Senior Debt until such
Senior Debt is paid in full (except to the extent, if at all, that holders of
senior subordinated and subordinated Debt Securities may receive securities that
are subordinated to the same extent the senior subordinated and subordinated
Debt Securities are subordinated to Senior Debt); (b) in addition, holders of
senior subordinated debt will be entitled to be paid in full before payments may
be made on subordinated Debt Securities and holders of subordinated Debt
Securities will be required to pay over their share of such distributions to the
holders of senior subordinated debt until such senior subordinated debt is paid
in full (except to the extent, if at all, that holders of subordinated Debt
Securities may receive securities that are subordinated to the same extent the
subordinated Debt Securities are subordinated to senior subordinated debt); and
(c) creditors of the Company who are not holders of senior subordinated or
subordinated Debt Securities may recover less, ratably, than holders of Senior
Debt and may recover more, ratably, than the holders of the senior subordinated
or subordinated Debt Securities, and creditors of the Company who are not
holders of subordinated Debt Securities may recover less, ratably, than holders
of Senior Debt and may recover more, ratably, than holders of subordinated Debt
Securities. Accordingly, such subordination may result in a reduction or
elimination of payments to the holders of all senior subordinated and
subordinated Debt Securities or all subordinated Debt Securities.
 
     Except as may otherwise be described in the accompanying Prospectus
Supplement, no payment of principal or interest with respect to any of the
Offered Debt Securities that are senior subordinated or subordinated Debt
Securities may be made, nor may the Company acquire any Offered Debt Securities
that are senior subordinated or subordinated Debt Securities, in each case
except as set forth in the Indenture for such Offered Debt Securities, if any
default with respect to Senior Debt that permits the acceleration of the
maturity of any Senior Debt occurs and is continuing and such default is either
the subject of judicial proceedings or the Company receives notice (a "Default
Notice") of the default from a holder of Senior Debt entitled to give such a
notice. By reason of these provisions, in the event of a default on any Senior
Debt of the Company that is presently existing or may be incurred in the future,
payments of principal of and interest and premium, if any, on the Offered Debt
Securities that are senior subordinated or subordinated Debt Securities may not
be permitted until such Senior Debt is paid in full. However, except as may
otherwise be described in the accompanying Prospectus Supplement, the Company
may resume payments in respect of the Offered Debt Securities that are senior
subordinated or subordinated Debt Securities and may acquire such senior
subordinated or subordinated Debt Securities if (a) 179 days pass after the
Default Notice is given, if the default with respect to such Senior Debt is not
then the subject of judicial proceedings, or (b) the default with respect to
such Senior Debt is cured or waived and, in each case described in the foregoing
clauses (a) and (b), the terms of the Indenture otherwise permit the payment or
acquisition of such Offered Debt Securities at the time in question. The
Company's principal credit facility restricts the acquisition by the
 
                                        6
<PAGE>   50
 
Company of its subordinated indebtedness, including any senior subordinated or
subordinated Debt Securities, prior to the term of the principal credit facility
as it may be extended from time to time, and the Indentures for the Company's
$100 million of 9 3/4% Senior Subordinated Debentures, $100 million of 9% Senior
Subordinated Debentures and $150 million of 9 3/4% Senior Subordinated
Debentures due 2008 restrict the acquisition, prior to March 1, 2003, February
15, 2006 and January 15, 2008, respectively, of subordinated Debt Securities
issued pursuant to the Subordinated Debt Indenture. The Prospectus Supplement or
the information incorporated herein by reference sets forth the approximate
amount of Senior Debt and Senior Subordinated Debt outstanding as of the end of
the most recent fiscal quarter of the Company.
 
CERTAIN COVENANTS OF THE COMPANY
 
     AFFIRMATIVE COVENANTS.  In addition to such other covenants, if any, as may
be described in the accompanying Prospectus Supplement and except as may
otherwise be set forth therein, the Indenture for the Offered Debt Securities
will require the Company, subject to certain limitations described therein, to,
among other things, do the following: (a) deliver to the Trustee copies of all
reports filed with the Commission; (b) deliver to the Trustee annual officers'
certificates with respect to the Company's compliance with its obligations under
that Indenture; (c) maintain its corporate existence subject to the provisions
described below relating to mergers and consolidations; and (d) pay its taxes
when due except where such taxes are being contested in good faith. Except as
may be set forth in the accompanying Prospectus Supplement, the Indentures will
not restrict the business or operations of the Company or its subsidiaries,
limit their indebtedness or prohibit any liens, charges or other encumbrances on
any properties or other assets they may have from time to time.
 
     DIVIDENDS AND OTHER PAYMENTS.  Except as may otherwise be provided in the
accompanying Prospectus Supplement and except as may otherwise be set forth in
the Indenture for the Offered Debt Securities, that Indenture will generally
prohibit the Company from making a "Restricted Payment" (defined below) if, at
the time of the Restricted Payment, (a) an Event of Default (as defined) has
occurred under the Indenture and is continuing or would occur as a consequence
of the Restricted Payment or (b) if, upon giving effect to the Restricted
Payment, the aggregate amount expended for all Restricted Payments exceeds the
sum of (i) a specified percentage of the aggregate consolidated net earnings of
the Company accrued during certain fiscal quarters, (ii) the aggregate net
proceeds received by the Company from the issuance or sale of capital stock of
the Company, (iii) the amount expended by the Company for the purchase,
redemption or other acquisition or retirement for value of any preferred stock
of the Company plus (iv) the amount set forth in the accompanying Prospectus
Supplement. Except as may be otherwise provided in the accompanying Prospectus
Supplement, a "Restricted Payment" will be defined as any of the following: (1)
declaring or paying any dividend on, or making any distribution to the holders
of, any shares of the Company's capital stock, other than dividends or
distributions payable in "Equity Interests" (defined as equity securities or
securities with a right to acquire equity securities (other than convertible
debt securities) of the Company) or (2) purchasing, redeeming or otherwise
acquiring or retiring for value any Equity Interests.
 
     CHANGE OF CONTROL.  Except as may otherwise be set forth in the
accompanying Prospectus Supplement, the Indenture for the Offered Debt
Securities will provide that, if a Change of Control occurs, the Company will be
obligated to offer to purchase all outstanding Offered Debt Securities at a
purchase price equal to 100 percent of the aggregate principal amount of the
Debt Securities, plus accrued and unpaid interest to the date of purchase. Any
offer to purchase Offered Debt Securities upon a Change of Control will be
conducted in compliance with applicable regulations under the federal securities
laws, including Exchange Act Rule 14e-1. Any limitations on the Company's
financial ability to purchase Offered Debt Securities upon a Change of Control
will be described in the accompanying Prospectus Supplement. Except as may be
otherwise provided in the accompanying Prospectus Supplement, a "Change of
Control" will be defined in the Indenture for the Offered Debt Securities as any
of the following: (a) all or substantially all of the Company's assets are sold
as an entirety to any person or it engages in any merger, consolidation, sale of
capital stock, sale of beneficial ownership interests or any other transactions
as a result of which its shareholders immediately prior to such transactions
own, directly or indirectly, in the aggregate less than 50 percent of the total
voting power entitled to vote in the election of (i) its directors, if it is the
surviving entity, or (ii) the directors, managers or trustees of
 
                                        7
<PAGE>   51
 
(1) the surviving entity or (2) the purchaser of all or substantially all of its
assets; or (b) any person acquires more than 50 percent of the total voting
power entitled to vote for directors of the Company. Except as may otherwise be
set forth in the accompanying Prospectus Supplement, the Company's failure to
comply with the Change of Control covenant as to the Offered Debt Securities
will be an Event of Default under the Indenture for the Offered Debt Securities,
as specified in the accompanying Prospectus Supplement. See "Events of Default"
below. The meaning of the term "all or substantially all of the assets" has not
been definitely established and is likely to be interpreted by reference to
applicable state law if and at the time the issue arises and will be dependent
on the facts and circumstances existing at the time. Accordingly, there may be
uncertainty as to whether a holder of Offered Debt Securities can determine
whether a Change of Control has occurred and exercise any remedies such holder
may have upon a Change of Control. Except as described above with respect to a
Change of Control or as described in the accompanying Prospectus Supplement, the
Indenture for the Offered Debt Securities will not afford holders of the Debt
Securities protection in the event of a highly leveraged transaction, takeover,
reorganization, restructuring, recapitalization, merger or similar transaction
involving the Company that may adversely affect holders of the Debt Securities.
 
     MERGER, CONSOLIDATION, SALE, LEASE OR CONVEYANCE.  Except as may otherwise
be provided in the accompanying Prospectus Supplement, the Indenture for the
Offered Debt Securities will provide that the Company will not merge or
consolidate with or into any other person and will not sell, lease or convey all
or substantially all of its assets to any person, unless it is the continuing
corporation, or the successor corporation or person that acquires all or
substantially all of its assets is a corporation organized and existing under
the laws of the United States or a State thereof or the District of Columbia and
expressly assumes all of the Company's obligations under the Offered Debt
Securities and the Indenture for the Offered Debt Securities and, immediately
after such merger, consolidation, sale, lease or conveyance, such person or such
successor corporation is not in default in the performance of the covenants and
conditions in the Indenture for the Offered Debt Securities. With respect to
possible uncertainties concerning the meaning of the term "all or substantially
all of the assets", the possible lack of protection in a highly leveraged merger
or other transaction and related possible effects on holders of the Debt
Securities, see "Change of Control" above.
 
REDEMPTION
 
     If and to the extent set forth in the accompanying Prospectus Supplement,
the Company will have the right to redeem the Offered Debt Securities, in whole
or from time to time in part, after the date and at the redemption prices set
forth in the accompanying Prospectus Supplement.
 
EVENTS OF DEFAULT
 
     Except as may be described in the accompanying Prospectus Supplement, an
"Event of Default" will be defined under the Indenture for the Offered Debt
Securities as being: (a) default for 30 days in payment of any interest on the
Offered Debt Securities; (b) default in payment of any principal of the Offered
Debt Securities, either at maturity (or upon any redemption), by declaration or
otherwise; (c) default for 60 days after written notice in the performance of
any other agreements or covenants in, or provisions of, the Offered Debt
Securities or the Indenture for the Offered Debt Securities; (d) an event of
default under any mortgage, indenture or instrument under which there may be
issued or by which there may be secured or evidenced any Indebtedness for money
borrowed by the Company and certain of its subsidiaries (or the payment of which
is guaranteed by the Company), other than non-recourse Indebtedness, if (i)
either (1) such event of default results from the failure to pay any such
Indebtedness at maturity and such default has not been cured or such
acceleration rescinded or (2) as a result of such event of default, the maturity
of such Indebtedness has been accelerated prior to its expressed maturity and
(ii) the principal amount of such Indebtedness, together with the principal
amount of any other such Indebtedness in default for failure to pay principal at
maturity or the maturity of which has been so accelerated and the acceleration
of which has not been rescinded, equals or exceeds the amount specified in the
accompanying Prospectus Supplement; (e) failure for 60 days to discharge final
judgments against the Company and certain of its subsidiaries for the payment of
money aggregating the amount specified in the accompanying Prospectus Supplement
or more; and (f) certain events of bankruptcy, insolvency or reorganization.
 
                                        8
<PAGE>   52
 
     The Indenture for the Offered Debt Securities will provide that if an Event
of Default (other than an Event of Default due to certain events of bankruptcy,
insolvency or reorganization) has occurred and is continuing, either the Trustee
or the holders of not less than 25 percent in principal amount of the Offered
Debt Securities outstanding under the Indenture for the Offered Debt Securities,
or such other amount as may be specified in the Prospectus Supplement, may then
declare the principal of all Offered Debt Securities under that Indenture and
interest accrued thereon to be due and payable immediately.
 
     Except to the extent otherwise stated in the accompanying Prospectus
Supplement, the Indenture for the Offered Debt Securities will contain a
provision entitling the Trustee, subject to the duty of the Trustee during a
default to act with the required standard of care, to be indemnified by the
holders of Offered Debt Securities before proceeding to exercise any right or
power under that Indenture at the request of such holders. Subject to such
provisions in the Indenture for the Offered Debt Securities for the
indemnification of the Trustee and certain other limitations, the holders of a
majority in principal amount of the Offered Debt Securities then outstanding may
direct the time, method and place of conducting any proceeding for any remedy
available to the Trustee or exercising any trust or power conferred on the
Trustee.
 
     Except to the extent otherwise stated in the accompanying Prospectus
Supplement, the Indenture for the Offered Debt Securities will provide that no
holder of Offered Debt Securities may institute any action against the Company
under the Indenture (except actions for payment of overdue principal or
interest) unless (a) such holder previously has given the Trustee written notice
of the default and continuance thereof, (b) the holders of not less than 25
percent in principal amount of the Offered Debt Securities then outstanding have
requested the Trustee to institute such action and offered the Trustee
reasonable indemnity, (c) the Trustee has not instituted such action within 60
days of the request and (d) the Trustee has not received direction inconsistent
with such written request from the holders of a majority in principal amount of
the Offered Debt Securities then outstanding under the Indenture.
 
     The Indentures and the Debt Securities will provide that no director,
officer, employee or shareholder of the Company, as such, will have any
liability for any obligations of the Company under the Debt Securities or the
Indentures. The Indentures and the Debt Securities will also each provide that
each holder of the Debt Securities, by accepting the Debt Securities, waives and
releases all such liability.
 
DEFEASANCE AND DISCHARGE
 
     Except as may otherwise be provided in the accompanying Prospectus
Supplement, the Company can discharge or defease its obligations under the
Indenture for the Offered Debt Securities as set forth below.
 
     Under terms satisfactory to the Trustee, the Company may discharge certain
obligations to holders of the Offered Debt Securities that have not already been
delivered to the Trustee for cancellation and that have either become due and
payable or are by their terms due and payable within one year (or scheduled for
redemption within one year) by irrevocably depositing with the Trustee cash or
United States Government Obligations (as defined in the Indenture for the
Offered Debt Securities), or a combination thereof, as trust funds in an amount
certified to be sufficient to pay at maturity (or upon redemption) the principal
of and interest on such Offered Debt Securities.
 
     The Company may also discharge any and all of its obligations to holders of
the Offered Debt Securities at any time ("defeasance"), but may not thereby
avoid its duty to register the transfer or exchange of the Offered Debt
Securities, to replace any temporary, mutilated, destroyed, lost or stolen
Offered Debt Securities or to maintain an office or agency in respect of such
Offered Debt Securities and certain other obligations. Alternatively, the
Company may be released with respect to the Offered Debt Securities from the
obligations imposed by specific portions of the Indenture for the Offered Debt
Securities (including the covenant described above limiting consolidations,
mergers, asset sales and leases) and omit to comply with such provisions without
creating an Event of Default ("covenant defeasance"). Defeasance or covenant
defeasance may be effected only if, among other things: (a) the Company
irrevocably deposits with the Trustee cash or United States Government
Obligations, or a combination thereof, as trust funds in an amount certified to
be sufficient to pay at maturity the principal of and interest on all
outstanding Offered Debt Securities; (b) no Event of Default under the Indenture
for the Offered Debt Securities has occurred and is then continuing;
                                        9
<PAGE>   53
 
(c) the defeasance or covenant defeasance will not result in an event of default
under any agreement to which the Company is a party or by which it is bound; and
(d) the Company delivers to the Trustee an opinion of counsel to the effect that
the holders of Debt Securities will not recognize income, gain or loss for
federal income tax purposes as a result of such defeasance or covenant
defeasance and that such defeasance or covenant defeasance will not otherwise
alter such holders' federal income tax treatment of principal and interest
payments on the Offered Debt Securities.
 
MODIFICATIONS TO THE INDENTURES
 
     Except as may otherwise be set forth in the accompanying Prospectus
Supplement, the Indenture for the Offered Debt Securities will provide that the
Company and the Trustee may enter into supplemental indentures without the
consent of the holders of Offered Debt Securities to, among other things: (a)
add covenants, conditions and restrictions for the protection of the holders of
Offered Debt Securities or to surrender any right of the Company; (b) cure any
ambiguity or correct any inconsistency in the Indenture for the Offered Debt
Securities; (c) make any change that does not adversely affect the legal rights
of holders of Offered Debt Securities; (d) modify, eliminate or add to the
provisions of the Indenture for the Offered Debt Securities to the extent
necessary to qualify that Indenture under applicable federal statutes; or (e)
make any other changes in the Indenture before Offered Debt Securities are
issued thereunder, provided that such changes are not prohibited by the Trust
Indenture Act.
 
     Except as may otherwise be set forth in the accompanying Prospectus
Supplement, the Indenture for the Offered Debt Securities also will contain
provisions permitting the Company and the Trustee, with the consent of the
holders of not less than a majority in principal amount of Offered Debt
Securities outstanding, to add any provision to, change in any manner or
eliminate any of the provisions of the Indenture for the Offered Debt Securities
or modify in any manner the rights of the holders of the Offered Debt Securities
so affected; provided that the Company and the Trustee may not, without the
consent of the holder of each outstanding Offered Debt Security affected
thereby, do, among other things, any of the following: (a) reduce the amount of
Offered Debt Securities whose holders must consent to an amendment, supplement
or waiver with respect to the Indenture; (b) reduce the rate of or change the
time for payment of interest on any Offered Debt Security; (c) reduce the
principal of or change the fixed maturity of any Offered Debt Security; or (d)
waive a default in the payment of the principal of, or interest on, any Offered
Debt Security.
 
     The Indentures for senior subordinated or subordinated Offered Debt
Securities may not be amended to alter the subordination of any outstanding
senior subordinated or subordinated Debt Securities without the consent of each
holder of Senior Debt and, as to subordinated Debt Securities, also senior
subordinated debt then outstanding that would be adversely affected thereby.
 
CONCERNING THE TRUSTEE
 
     Unless otherwise stated in the Prospectus Supplement, the Trustee under the
first Indenture under which Debt Securities will be issued will be Bank of
Montreal Trust Company. An affiliate of Bank of Montreal Trust Company is a
lender to the Company under one of the Company's short-term lines of credit.
Unless stated in the applicable Prospectus Supplement, (i) it or any other
Trustee may also be the Trustee under any indenture for Offered Debt Securities
and (ii) any Trustee or its affiliates may be a lender to the Company, including
under its principal credit facility, and may from time to time have lender or
other business arrangements with the Company. The Indenture will contain certain
limitations on the rights of the Trustee, should it or its affiliates then be
creditors of the Company, to obtain payment of claims in certain cases or to
realize on certain property received in respect of any such claim as security or
otherwise. The Trustee and its affiliates will be permitted to engage in other
transactions; however, if they acquire any conflicting interest, the conflict
must be eliminated or the Trustee must resign.
 
     The Holders of a majority in principal amount of the then outstanding Debt
Securities issued under any Indenture will have the right to direct the time,
method and place of conducting any proceeding for exercising any remedy
available to the Trustee under that Indenture, subject to certain exceptions.
Unless otherwise stated in the applicable Prospectus Supplement, the Indentures
will provide that in case an Event of Default
 
                                       10
<PAGE>   54
 
occurs and is not cured, the Trustee will be required, in the exercise of its
power, to use the degree of care of a prudent person in similar circumstances in
the conduct of his, her or its affairs. Subject to such provisions, the Trustee
will be under no obligation to exercise any of its rights or powers under any
Indenture at the request of any Holder, unless such Holder has offered the
Trustee security and indemnity satisfactory to the Trustee.
 
GOVERNING LAW
 
     Unless otherwise specified in the accompanying Prospectus Supplement, the
Indenture for the Offered Debt Securities and the Offered Debt Securities will
be governed by New York law.
 
                            DESCRIPTION OF WARRANTS
 
GENERAL
 
     Except as otherwise set forth in the accompanying prospectus supplement,
the Warrants will be issued in fully registered form under a Warrant Agreement
between the Company and the Warrant Agent named in the accompanying Prospectus
Supplement (the "Warrant Agent"). The statements in this Prospectus relating to
the Warrants and the Warrant Agreement are summaries and do not purport to be
complete.
 
     Each Warrant will entitle the registered owner (the "Warrantholder") to
purchase one share of Preferred or Common Stock, as set forth in the
accompanying Prospectus Supplement, subject to the call provisions referred to
below, from the time the Warrants are separately transferable until the date set
forth in the accompanying Prospectus Supplement. The initial per share exercise
price of the Warrants and the date on which the Warrants become separately
transferable will be set forth in the applicable Prospectus Supplement.
 
     The Warrants can be exercised by surrendering to the Warrant Agent a
Warrant certificate signed by the Warrantholder or his, her or its duly
authorized agent indicating the Warrantholder's election to exercise all or
portion of the Warrants evidenced by the certificate. Surrendered Warrant
certificates must be accomplished by payment of the aggregate exercise price of
the Warrants to be exercised (the "Warrant Price"), which payment may be made in
the form of cash or a cashier's check equal to the exercise price or, if and to
the extent set forth in the accompanying Prospectus Supplement, the surrender of
Debt Securities in denominations at least equal to the aggregate Warrant Prices
or, if applicable, any combination of cash and such denominations of Debt
Securities. If the principal amount of Debt Securities surrendered is in excess
of the aggregate Warrant Price so paid, only a portion of such surrendered
principal amount shall be accepted against payment of the Warrant Price and new
Debt Securities shall be issued in the principal amount not so applied against
the aggregate Warrant Price, provided that the amount of such excess is $1,000
or an integral multiple thereof.
 
     Certificates evidencing duly exercised Warrants shall be delivered by the
Warrant Agent to the transfer agent for the Preferred or Common Stock, as
applicable. Upon receipt thereof, the transfer agent will be obligated to
deliver or cause to be delivered, to or upon the written order of the exercising
Warrantholders, certificates representing the number of shares of Preferred or
Common Stock so purchased. If fewer than all of the Warrants evidenced by any
certificate are exercised, the Warrant Agent will be obligated to deliver to the
exercising Warrantholder a new Warrant certificate representing the unexercised
Warrants.
 
     To the extent set forth in the accompanying Prospectus Supplement, the
Warrant Price and the number of shares of Preferred or Common Stock purchasable
upon the exercise of each Warrant are subject to adjustment in certain events,
including: (i) the issuance of a stock dividend to holders of Preferred Stock or
Common Stock (whichever the Warrants are exercisable for) or a combination,
subdivision, or reclassification of the Preferred Stock or the Common Stock
(whichever the Warrants are exercisable for); (ii) the issuance of rights,
warrants or options or securities convertible into, or exchangeable for, the
Preferred Stock or the Common Stock (whichever the Warrants are exercisable
for), that are distributed to all holders of the Company's outstanding Preferred
or Common Stock (whichever the Warrants are exercisable for) entitling them to
subscribe for or purchase Preferred or Common Stock; and (iii) any distribution
by the Company to the holders of its Preferred or Common Stock (whichever the
Warrants are exercisable for) of evidences of
 
                                       11
<PAGE>   55
 
indebtedness of the Company or of assets (excluding, if and to the extent set
forth in the accompanying Prospectus Supplement, certain cash dividends or
distributions). To the extent set forth in the accompanying Prospectus
Supplement, no adjustment in the number of shares purchasable upon exercise of
the Warrants or in the Warrant Price will be required until cumulative
adjustments require an adjustment of at least one percent thereof. In addition,
unless the accompanying Prospectus Supplement states to the contrary, the
Company may, at its option, reduce the Warrant Price at any time. No fractional
shares will be issued upon exercise of Warrants, but the Company will pay the
cash value of any fractional shares otherwise issuable.
 
     Notwithstanding the foregoing, unless the accompanying Prospectus
Supplement states to the contrary, in case of any consolidation, merger or sale
or conveyance of the property of the Company and its subsidiaries as a whole,
including a consolidation or merger in which the Company is the continuing
corporation and in which all or a majority of the Preferred and Common Stock
outstanding immediately prior to the consolidation or merger is converted into
consideration other than capital stock (or the right to receive such
consideration), the holder of each outstanding Warrant shall have the right to
exercise the Warrant for the kind and amount of shares of stock and other
securities and property (including cash) receivable by a holder of the number of
shares of Preferred and Common Stock for which such Warrant was exercisable
immediately prior thereto.
 
     Adjustments to the Warrant Price (and, possibly, adjustment to the number
of shares of Preferred or Common Stock purchasable upon the exercise of each
Warrant), or the failure to make such adjustments, may in certain circumstances
result in distributions that could be taxable as dividends under the Internal
Revenue Code of 1986, as amended, to holders of the Warrants or to holders of
shares of Preferred or Common Stock issued upon exercise thereof. The Company
will reserve the right (but will not be obligated) to make such adjustments to
the Warrant Price or in the number of shares of Preferred or Common Stock
purchasable upon the exercise of each Warrant, in addition to those required in
the foregoing provisions, as it shall determine to be advisable in order that
certain stock-related distributions which may hereafter be made by the Company
to its stockholders after the date of the accompanying Prospectus Supplement
shall not be taxable to them.
 
     If all or any portion of the Warrants are callable at the option of the
Company, the call provisions, including the call price and the date through
which the Warrants may be exercised, will be set forth in the accompanying
Prospectus Supplement. If upon expiration the unexercised Warrants will convert
into Preferred or Common Stock, the manner and rate of such conversion will be
set forth in the accompanying Prospectus Supplement.
 
     Holders of Warrants are not entitled, by virtue of being holders, to
receive dividends or to consent or to receive notice as stockholders in respect
of any meeting of stockholders for the election of directors of the Company or
any other matter, to vote at any such meeting or to exercise any rights
whatsoever as stockholders of the Company. The Warrant Agreement and the
Warrants will provide that no director, officer, employee or shareholder of the
Company, as such, will have any liability under the Warrants or the Warrant
Agreement. The Warrant Agreement and the Warrants will also each provide that
each holder of the Warrants, by accepting the Warrants, waives and releases all
such liability.
 
     Unless otherwise specified in the accompanying Prospectus Supplement, the
Warrant Agreement and the Warrants will be governed by New York law.
 
                                       12
<PAGE>   56
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The authorized capital stock of the Company consists of 30,000,000 shares
of Common Stock, $.001 par value, and 10,000,000 shares of Preferred Stock,
$.001 par value, of which 18,107,606 shares of Common Stock (exclusive of
treasury shares) were issued and outstanding on June 30, 1998. No shares of
Preferred Stock were outstanding at that date.
 
COMMON STOCK
 
     Subject to the rights of holders of any outstanding Preferred Stock, the
holders of outstanding shares of Common Stock are entitled to share ratably in
dividends declared out of assets legally available therefor at such time and in
such amounts as the Board of Directors may from time to time lawfully determine.
At the date of this Prospectus the payment of dividends on the Common Stock is
limited by provisions of the Indentures for the Company's $100 million of 9 3/4%
Senior Subordinated Debentures due March 1, 2003, $100 million of 9% Senior
Subordinated Debentures due February 15, 2006 and $150 million of 9 3/4% Senior
Subordinated Debentures due 2008 and its principal credit facility.
 
     Each holder of Common Stock is entitled to one vote for each share held by
him. Holders of Common Stock are not entitled to cumulate votes for the election
of directors. The Common Stock is not entitled to conversion or preemptive
rights and is not subject to redemption or assessment. Subject to the rights of
holders of any outstanding Preferred Stock, upon liquidation, dissolution or
winding up of the Company, any assets legally available for distribution to
shareholders as such are to be distributed ratably among the holders of the
Common Stock at that time outstanding. The Common Stock presently outstanding
is, and the Common Stock issued upon conversion of the Debt Securities, exercise
of the Warrants (upon payment in full of the Warrant exercise price) or
conversion of any convertible Preferred Stock offered hereby, as the case may
be, will be, fully paid and nonassessable. The Common Stock is listed on the New
York and Pacific Stock Exchanges.
 
PREFERRED STOCK
 
     The authorized shares of Preferred Stock are issuable, without further
shareholder approval, in one or more series as determined by the Board of
Directors, with such rights, privileges and preferences as are fixed by the
Board of Directors, including dividend, liquidation and other rights preferred
over the Common Stock, subject to the restrictions in the Indentures and credit
facility referred to above. The Preferred Stock issuable upon exercise of any
Warrants exercisable for Preferred Stock (upon payment in full of the Warrant
exercise price) or conversion of any Debt Securities convertible into Preferred
Stock will be fully paid and nonassessable. The Preferred Stock may be
convertible and, if so convertible, may be converted into one or both of Common
Stock and Debt Securities. The Preferred Stock may also be exchangeable, at the
option of the Company, for Debt Securities (see "Description of Debt
Securities"). If Preferred Stock or Warrants exercisable for Preferred Stock are
being offered or if the Preferred Stock is exchangeable for Debt Securities, the
accompanying Prospectus Supplement will describe the rights, privileges,
preferences and restrictions of such Preferred Stock (including, without
limitation, the designation, the number of authorized shares of the series in
question, the dividend rate (or method of calculation), any voting rights,
conversion rights, anti-dilution protections, exchangeability provisions and
terms of the Debt Securities that are exchangeable for the Preferred Stock, any
redemption provisions, liquidation preferences and any sinking fund provisions).
If fractional interests in shares of Preferred Stock may be issued, there will
be a depositary for the shares of Preferred Stock involved and the applicable
Prospectus Supplement will describe the terms of the depositary arrangement and
related matters.
 
                                       13
<PAGE>   57
 
                              PLAN OF DISTRIBUTION
 
     The Company may sell the Securities to one or more underwriters for public
offering and sale by them or may sell the Securities to investors directly or
through agents. Any such underwriter or agent involved in the offer and sale of
the Securities will be named in the applicable Prospectus Supplement. The
Company may sell Securities directly to investors on its own behalf in those
jurisdictions where it is authorized to do so.
 
     Underwriters may offer and sell the Securities at a fixed price or prices,
which may be changed, at market prices prevailing at the time of sale, at prices
related to such prevailing market prices or at negotiated prices. The Company
also may, from time to time, authorize dealers, acting as Company agents, to
offer and sell the Securities upon such terms and conditions as may be set forth
in the Prospectus Supplement. In connection with the sale of the Securities,
underwriters may receive compensation from the Company in the form of
underwriting discounts or commissions and may also receive commissions from
purchasers of the Securities for whom they may act as agent. Underwriters may
sell the Securities to or through dealers, and such dealers may receive
compensation in the form of discounts, concessions or commissions from the
underwriters or commissions from the purchasers for which they may act as
agents.
 
     Any underwriting compensation paid by the Company to underwriters or agents
in connection with the offering of the Securities, and any discounts or
concessions or commissions allowed by underwriters to participating dealers,
will be set forth in the applicable Prospectus Supplement. Dealers and agents
participating in the distribution of the Securities may be deemed to be
underwriters, and any discounts and commissions received by them and any profit
realized by them on resale of the Securities may be deemed to be underwriting
discounts and commissions. Underwriters, dealers and agents may be entitled,
under agreements entered into with the Company, to indemnification against and
contribution toward certain civil liabilities.
 
     The Debt Securities, the Preferred Stock and the Warrants will be new
issues of securities with no established trading market. Any underwriters or
agents to or through which Securities are sold by the Company for public
offering and sale may make a market in such Securities, but such underwriters or
agents will not be obligated to do so and any of them may discontinue any market
making at any time without notice. No assurance can be given as to the liquidity
of or trading market for any Debt Securities, Preferred Stock or Warrants.
 
                             CERTAIN LEGAL MATTERS
 
     Gibson, Dunn & Crutcher LLP has rendered an opinion (filed as an exhibit to
the Registration Statement) with respect to the validity of the Debt Securities,
Preferred Stock, Common Stock and Warrants covered by this Prospectus. Certain
legal matters in connection with offerings made by this Prospectus may be passed
on for any underwriters by counsel named in the Prospectus Supplement.
 
                                    EXPERTS
 
     The consolidated financial statements and schedules of Del Webb Corporation
and subsidiaries as of June 30, 1998 and 1997, and for each of the years in the
three-year period ended June 30, 1998, have been incorporated by reference
herein and in the Registration Statement in reliance upon the report of KPMG
Peat Marwick LLP, independent certified public accountants, incorporated by
reference herein, and upon the authority of said firm as experts in accounting
and auditing. The report of KPMG Peat Marwick LLP covering the June 30, 1996
financial statements refers to a change in the method of accounting for
long-lived assets.
 
                                       14
<PAGE>   58

                         Photo depicting Mesquite Model
                                 Sun City Grand
                                        
                          Photo depicting Huron Model
                              Sun City at Huntley
                                        
                    Photo depicting Legacy Grill & Pro Shop
                              Sun City Georgetown
                                        
                      Photo depicting Sonoran Social Hall
                                 Sun City Grand


<PAGE>   59
 
PROSPECTUS SUPPLEMENT                                          February   , 1999
 
                                  $200,000,000
 
                          [DEL WEBB CORPORATION LOGO]
 
                       % SENIOR SUBORDINATED DEBENTURES DUE 2010
 
                            WARBURG DILLON READ LLC
                              GOLDMAN, SACHS & CO.
                      NATIONBANC MONTGOMERY SECURITIES LLC
 
You should rely only on the information incorporated by reference or contained
in this Prospectus Supplement and the related Prospectus. We have not authorized
anyone to provide you with different information. We are not, and the
Underwriters are not, offering the Debentures in any state where such an
offering is not permitted. You should not assume that the information contained
in this Prospectus Supplement is accurate as of any date other than the date on
the front of this Prospectus Supplement.


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