[Flagstar Letterhead]



August 23, 2005

Securities and Exchange Commission
Division of Corporation Finance
Mail Stop 4561
450 Fifth Street, N.W.
Washington, D.C. 20549
Attention: Mr. Kevin Vaughn, Accounting Branch Chief

         Re:      Flagstar Bancorp, Inc.
                  Form 10-K filed March 23, 2005
                  Supplemental Response dated March 22, 2005
                  File No. 001-16577

Dear Mr. Vaughn:

         We are writing in response to your letter dated July 7, 2005 (the
"Comment Letter") regarding our Annual Report on Form 10-K filed March 23, 2005.
As our outside counsel discussed with Angela Jackson of your office, we did not
receive the Comment Letter until Ms. Jackson provided it to us via facsimile on
July 26, 2005 after we discovered its existence. This letter is being provided
to you today pursuant to our subsequent request for an extension of time
discussed with you by our outside legal counsel on August 19, 2005.

         Please note that our responses below reflect our outside counsel's
understanding with Ms. Jackson that we may defer any amendments to our prior
filings with the Commission pending your review of this letter. In particular,
we understand the Staff will review our responses below, as well as the Item 4
disclosure in our June 30, 2005 Form 10-Q filed on August 9, 2005, in
considering whether any amendments to our 2004 Form 10-K and our March 31, 2005
Form 10-Q would be necessary.

         Our responses to the Comment Letter are set forth below, in each case
preceded by a reproduction of the corresponding comment.

Comment No. 1.    We note your response to comment 17 from our letter dated
                  December 21, 2004 and the revised disclosures included in your
                  Form 10-K for the year ended December 31, 2004. Please advise
                  us as follows with respect to the operations of Flagstar
                  Credit Corporation:

                  o        Your disclosure on page 76 of your December 31, 2004
                           Form 10-K indicates that as part of certain
                           contractual arrangements, you provide performance
                           guarantees on certain pools of loans which






Mr. Kevin Vaughn
August 23, 2005
Page 2

                           were underwritten and originated by you. Advise us as
                           to whether these loans were subsequently sold in the
                           secondary market;

                  o        Tell us in detail how these reinsurance arrangements
                           affect your accounting for loan sales under SFAS 140.

Response No. 1.   The contractual arrangements referred to in Comment No. 1 of
                  the Comment Letter are private mortgage re-insurance
                  arrangements entered into by our subsidiary, Flagstar Credit
                  Corporation ("Credit"), with unaffiliated insurance companies.
                  Credit provides private mortgage insurance with respect to
                  mortgage loans underwritten and originated by us. In all
                  cases, a substantial portion of Credit's risk under these
                  insurance policies is ceded to other mortgage insurance
                  companies by way of these re-insurance arrangements. The
                  re-insurers provide first loss coverage and coverage for
                  losses over a stated maximum. Credit retains an intermediate
                  tranche of insurance coverage. The performance guarantees
                  described in our Form 10-K refer to Credit's retention of this
                  intermediate tranche of insurance coverage. Management
                  believes that Credit's exposure to risk of loss from this
                  intermediate tranche of insurance coverage exists only in the
                  event of catastrophic events which have a remote likelihood of
                  occurrence. The Staff should note that no claim has ever been
                  paid by Credit on these mortgage insurance policies.

                  Many of the mortgage loans for which Credit provides mortgage
                  insurance are sold by us in the secondary market. We treat
                  these sales as true sales for purposes of SFAS 140 because
                  these loans are legally isolated notwithstanding the fact that
                  our subsidiary provides policies of loan insurance on some of
                  these loans.

                  All mortgage loans, whether or not insured by Credit, that we
                  sell in secondary market transactions are sold under
                  contractual arrangements that convey full title to the buyer.
                  As a result, the transferred mortgage loans are fully isolated
                  from us and from our creditors, even in a bankruptcy or other
                  receivership situation. The buyer has the right to pledge or
                  exchange the purchased loans and there is no condition that
                  constrains that right. We do not maintain effective control of
                  the loans through any agreement that either entitles or
                  obligates us to repurchase or redeem the loans before their
                  maturity or gives us the ability to unilaterally cause the
                  purchaser to return the loans to us. The mortgage insurance
                  policies provided by Credit do not constitute any type of
                  retained interest in the sold mortgage loans. Consequently, we
                  believe that all conditions under SFAS 140 are met with
                  respect to the sale of these insured loans.





Mr. Kevin Vaughn
August 23, 2005
Page 3

Comment No. 2.    In your response to comment 27 from our letter dated December
                  21, 2004, you indicated that loans sold to the Federal Home
                  Loan Bank of Indianapolis (FHLBI) are done so on a
                  non-recourse basis with no interests retained other than
                  mortgage servicing rights. The FHLBI, however, states on their
                  website (www.fhlbi.com) that under their Mortgage Purchase
                  Program (MPP), "local institutions issue home mortgages and
                  retain a major share of their credit risk while selling the
                  mortgages to the FHLBI, which accepts the interest rate and
                  warehousing risks." Please address the following:

                  o        Tell us whether you share in the credit risk of those
                           loans sold to the FHLBI and describe the nature of
                           your risk-sharing arrangements and any retained
                           interests;

                  o        Tell us how you recorded any credit enhancements,
                           recourse provisions or retained interests in your
                           financial statements;

                  o        Provide us sample journal entries that reflect how
                           you record these credit enhancements and retained
                           interests upon transfer and over the life of the
                           loan;

                  o        Tell us how you determined that these risk-sharing
                           arrangements do not result in a retained interest in
                           loans sold to the FHLBI;

                  o        Tell us whether you pay fees to or receive fees from
                           the FHLBI to provide credit enhancement on the loans
                           sold, and if so, how you record those amounts;

                  o        Tell us whether any of your insurance subsidiaries
                           underwrite supplemental mortgage insurance that is
                           used to provide credit enhancements on loans sold to
                           the FHLBI. If so, clearly explain to us the terms of
                           those arrangements and how they function;

                  o        In your response you indicate that your loan sale
                           agreements with the FHLBI are similar to loan
                           agreements with Freddie, Fannie and other secondary
                           market participants. Please tell us as to whether
                           your loan sales to any of these other participants
                           contain similar risk-sharing provisions or credit
                           enhancement fee structures.

Response No. 2.   When we sell loans to the FHLBI under their Mortgage Purchase
                  Program ("MPP") we do not retain any credit risk with respect
                  to these loans. We have no liability whatsoever to FHLBI with
                  respect to payment or other defaults on these loans. To the
                  extent the description of the MPP on the FHLBI website suggest
                  otherwise, we believe it is simply incorrect.




Mr. Kevin Vaughn
August 23, 2005
Page 4
                  As noted in our previous response to the Staff, we do retain
                  mortgage servicing rights ("MSRs") in mortgage loans sold by
                  us to FHLBI. Under these MSRs we continue to service the sold
                  mortgage loans and retain a servicing fee equal to 25 basis
                  points of the unpaid principal balances.

                  In connection with the creation of each pool of mortgage loans
                  sold by us under the MPP, FHLBI creates a Spread Lender Risk
                  Account ("LRA") for our benefit which is maintained for a
                  period of 11 years from the date the final loan of the pool is
                  conveyed to FHLBI. Monthly contributions are made to the LRA
                  out of regular principal and interest payments made to FHLBI
                  on the mortgage loans in the pool until it is fully funded,
                  typically in an amount equal to 0.30% of the outstanding
                  principal balance of the underlying mortgage loans. Amounts in
                  the LRA established for a particular pool of mortgage loans
                  sold by us to FHLBI are available to FHLBI and its mortgage
                  insurers to reimburse them for credit losses on the mortgage
                  loans included in such pool only. Excess amounts in the LRA
                  may be released to us from time to time, subject to the
                  conditions stated in the loan sale agreement. Credit losses
                  incurred by FHLBI (or mortgage insurers) in excess of amounts
                  in the LRA may be rolled forward until additional
                  contributions are made to the LRA, but are not recoverable
                  from us. To the extent credit losses on the mortgage loans are
                  reimbursed from the LRA it will reduce the amount potentially
                  distributable to us from the LRA. However, in no event do we
                  have any obligation to contribute funds to the LRA or any
                  requirement to return any amounts previously distributed from
                  the LRA to us. In our view, the potential loss of this highly
                  contingent future benefit does not represent a credit risk to
                  us or any type of significant retained interest in the
                  underlying mortgage loans. Therefore, no entries are recorded
                  at the date of sale or over the life of the loan.

                  We reflect the MSRs on our balance sheet as an asset which is
                  amortized based upon the expected prepayment rate of the
                  underlying loans. Mortgage servicing fees are recognized as
                  income as earned.

                  We do not attribute any value to the LRA associated with a
                  pool of loans sold under the MPP due to the highly
                  subordinated and contingent nature of our right to receive
                  future distributions of amounts placed in the LRA by FHLBI. We
                  believe that all amounts in an LRA will likely be utilized to
                  cover credit losses and, as a result, no distributions to us
                  from the LRA are anticipated. Accordingly, we do not record an
                  asset for an LRA and we do not recognize any income for an LRA
                  until such time as cash is actually received by us from an




Mr. Kevin Vaughn
August 23, 2005
Page 5

                  LRA. Conversely, since we have no liability to fund and do not
                  otherwise contribute to the LRA, no liability is recorded.

                  We pay for supplemental mortgage insurance to cover any losses
                  exceeding those absorbed by the LRA and mortgage insurance
                  maintained by FHLBI. The premium for this additional mortgage
                  insurance is paid at closing in a single lump sum and is
                  treated by us as a transaction expense that is netted against
                  the sale proceeds. Neither we nor any of our affiliated
                  companies pay any other fees to or receive fees from FHLBI to
                  provide mortgage insurance or any other credit enhancement for
                  the mortgage loans sold to FHLBI. Flagstar Credit Corporation
                  does not underwrite supplemental mortgage insurance for any
                  loans sold by us to FHLBI.

                  Our loan sales agreements with Freddie, Fannie and other
                  secondary market participants do not contain an LRA or similar
                  structures. However, our loan sales to Freddie, Fannie and
                  other secondary market participants are similar in that they
                  are true sale transactions with no recourse to us and the
                  loans have been legally isolated for bankruptcy purposes.

Comment No. 3.    In light of the significant recourse you appear to retain on
                  loans sold FHLBI and the fact that you do not use a QSPE or
                  other intermediary as part of that transfer, please tell us
                  what evidence you obtained and provided to your auditors to
                  support your assertion in your response to comment 27 that the
                  loans were legally isolated. Accordingly, more clearly explain
                  to us how you determined that you met all the criteria in
                  paragraph 9 of SFAS 140 for sale treatment for loans sold to
                  FHLBI. In future filings, please revise to clearly disclose
                  how the loans transferred to the FHLBI meet each of the
                  criteria for sale treatment set forth in paragraph 9 of SFAS
                  140.

Response No. 3.   As discussed in our response to Comment No. 2 above, there is
                  no significant recourse as a result of our loan sales to the
                  FHLBI. Rather, the FHLBI looks to the LRA rather than us for
                  the reimbursement in the case of credit loss.

                  The loan sales for which we retain the servicing rights and an
                  interest in the LRA account are in fact true sales and the
                  loans sold are legally isolated. Our contractual arrangements
                  with FHLBI convey full title to FHLBI. As a result, the
                  transferred mortgage loans are fully isolated from us and from
                  our creditors, even in a bankruptcy or other receivership
                  situation. The FHLBI has the right to pledge or exchange the
                  loans received and there is no condition that constrains that
                  right. We do not maintain effective control of the loans
                  through any agreement that both entitles and obligates us to
                  repurchase or redeem



Mr. Kevin Vaughn
August 23, 2005
Page 6

                  the loans before their maturity or the ability to unilaterally
                  cause FHLBI to return specific assets. Consequently, we
                  believe that all conditions under SFAS 140 are met to
                  recognize the sale. Because of the immaterial amount of loans
                  sold by us to FHLBI, our external auditors did not require
                  further evidence supporting our position.


                  We will include disclosure in future filings which disclose
                  how the loans transferred to the FHLBI meet each of the
                  criteria for sale treatment under SFAS 140.

Comment No. 4.    We note your response to comment 24 from our letter dated
                  December 21, 2004. We reissue the following components of that
                  comment which were not addressed in your response:

                  o        Please tell us in detail how you calculated the
                           negative provision for the secondary market reserves
                           in 2002 as presented in your tables on pages 53 and
                           79 of your 2003 Form 10-K. Tell us the factors that
                           led to your determination that a reduction of the
                           reserves was necessary.

                  o        Clearly explain how that reduction was reflected in
                           your Statement of Earnings. If you recorded this
                           reduction as an increase in your Gain on sale of the
                           loans line item, explain why you believe that was
                           appropriate.

                  o        Reconcile the trends within the reserve and its
                           related provisions with the trends in your sales of
                           loans and repurchases of assets.

Response No. 4.   The 2002 negative provision for the secondary market reserve
                  resulted from reclassifications we made in 2003 at the request
                  of our banking regulator to segregate a reserve for secondary
                  market exposure separate and apart from the allowance for loan
                  losses. This required us to reduce the allowance for loan
                  losses by a corresponding amount. With that change for 2003,
                  we then made reclassifications to the 2002 audited financial
                  statements for comparability.

                  We determined the balance of the secondary market reserve at
                  year-end 2003 based upon consideration of the following
                  factors: (i) volume of loans sold over each of the preceding
                  five years; (ii) actual repurchase history for loans in each
                  of those years; (iii) further anticipated repurchases; (iv)
                  losses arising from those repurchases; and (v) actual recovery
                  history.

                  After determining the 2003 ending balance, we then calculated
                  hypothetical secondary market reserve balances for each of the
                  preceding five years using the same factors. This process
                  enabled us



Mr. Kevin Vaughn
August 23, 2005
Page 7

                  to derive a beginning balance for 2002 by calculating the
                  year-end balance for 2001. It also enabled us to determine the
                  ending balance for 2002.

                  Analyzing the components that comprised the allowance for loan
                  losses in 2002, we were then able to identify the charge-offs
                  and recoveries that actually related to secondary market
                  sales. These were also transferred to the 2002 secondary
                  market reserve, with a corresponding adjustment to the
                  allowance for loan losses. Having determined the 2002
                  beginning balance, the 2002 ending balance, and the actual
                  charge-offs and recoveries during 2002 for the secondary
                  market reserve, the provision amount had to be a negative
                  amount as a reconciling matter.

                  For income statement purposes, we reflected this reduction as
                  an increase in our Gain on Sale of Loans line item. This
                  provided a symmetrical result to the usual practice of
                  recording provisions (i.e., debits) against the Gain on Sale
                  account to reflect the effect of estimated losses inherent in
                  the loan portfolios sold.

                  The trends within the reserve and the related provision
                  reflect the anticipated losses from potential repurchases.
                  Loan sales and loan repurchases do not necessarily correlate,
                  nor do expected losses from the repurchases. For instance,
                  notwithstanding our higher loan sale volume in 2003 as
                  compared to 2002, our repurchase history for 2003 indicates a
                  lower repurchase percentage due to stricter underwriting
                  standards and automated validation of appraisals. Our loss
                  rate is also affected by our recovery rates on any losses
                  incurred, either from the loan brokers that provided us with
                  the loans initially or from the mortgage insurers covering the
                  loans.

Comment No. 5.    We note your response to prior comment 33 and the revisions
                  made to your segment footnote in your Form 10-K for the year
                  ended December 31, 2004. Your presentation of "revenues" does
                  not seem appropriate given the fact that these amounts are
                  shown net of interest expense. In addition, the amount
                  presented as revenues has not been reconciled to your
                  Statement of Earning as required by SFAS 131. In future
                  filings, please revise to either remove this measure from your
                  segment disclosures or properly label it based on its
                  components.

Response No. 5.   We revised our segment disclosure in our June 30, 2005 Form
                  10-Q to label revenue components in response to the Staff's
                  comment, and will continue this disclosure in future filings.




Mr. Kevin Vaughn
August 23, 2005
Page 8

Comment No. 6.    Please revise to provide the disclosures required by Item 307
                  of Regulation S-K with respect to your disclosure controls and
                  procedures.

Response No. 6.   The disclosure required by Item 307 of Regulation S-K
                  regarding our disclosure controls and procedures was
                  inadvertently not included in our Annual Report on Form 10-K
                  for the year ended December 31, 2004. However, this disclosure
                  has been included in subsequent filings on Form 10-Q and,
                  accordingly, the current assessment of management of our
                  disclosure controls and procedures has been disclosed. As a
                  result, it does not seem worthwhile to amend our Form 10-K at
                  this time to include disclosure that has been superseded by
                  subsequent filings.

Comment No. 7.    We note your statement that the chief executive officer and
                  chief financial officer have concluded that the company's
                  disclosure controls and procedures are not effective. Please
                  revise to disclose in reasonable detail the basis for your
                  officers' conclusions. In addition, we note that the company
                  identified the existence of several material weaknesses in its
                  Form 10-K for the year ended December 31, 2004. Please
                  disclose the specific steps that you have taken, if any, to
                  remediate the material weaknesses and disclose whether you
                  believe that the material weaknesses still exist.

Response No. 7.   We note for the Staff the following disclosure contained in
                  our Form 10-Q for the period ended June 30, 2005 which we
                  believe fully addresses the disclosure items raised in Comment
                  7.

                  "Item 4. Controls and Procedures

                  a) Disclosure Controls and Procedures. A review and evaluation
                  was performed by our principal executive and financial
                  officers regarding the effectiveness of our disclosure
                  controls and procedures as of June 30, 2005, pursuant to Rule
                  13a-15(b) of the Securities Act of 1934. Based on that review
                  and evaluation, the principal executive and financial officers
                  have concluded that our current disclosure controls and
                  procedures, as designed and implemented, are not operating
                  effectively as a result of the material weaknesses reported in
                  Item 9A-Controls and Procedures to our Annual Report of Form
                  10-K for the year ended December 31, 2004.

                  b) Changes in Internal Controls. During the quarter ended June
                  30, 2005, we have implemented changes to our internal control
                  over financial reporting identified in connection with the
                  evaluation required by Rule 13a-15(d) of the Securities Act of
                  1934 in order to address each of the six areas of material
                  weaknesses identified in Item




Mr. Kevin Vaughn
August 23, 2005
Page 9


                  9A-Controls and Procedures of our Annual Report on Form 10-K
                  for the year ended December 31, 2004. The changes implemented
                  during the quarter are:

                  o        Weakness related to our accounting for derivative
                           activities. We are implementing an ongoing continuing
                           education program for accounting personnel that
                           includes the areas of derivatives, allowance for loan
                           losses and transfers and servicing of financial
                           assets.

                  o        Weakness related to recording of accrued interest
                           receivable. We have refined our processes relating to
                           the calculation and recording of accrued interest on
                           mortgage loans.

                  o        Weaknesses related to the documentation of the
                           evaluation of the appropriateness of accounting
                           estimates. We have enhanced documentation of
                           significant accounting estimates.

                  o        Weaknesses surrounding the recording of non-routine
                           journal entries. We have enhanced documentation of
                           controls surrounding the recording of non-routine
                           journal entries. We have also engaged an outside
                           accounting consultant to provide additional guidance
                           with respect to non-routine transactions and entries.

                  o        Weaknesses related to validation and evaluation of
                           data. We are implementing controls over the
                           validation and evaluation of data used to support
                           certain transactions and estimates including the
                           valuation of interest rate lock commitments.

                  o        Weakness related to company-level controls. We have
                           taken the following steps to enhance company-level
                           controls:

                           o        Implementation of an accounting system wide
                                    automation process to reduce manual
                                    processes;

                           o        Adding experienced personnel to the
                                    accounting department;

                           o        Establishment of a financial internal audit
                                    department as a separate unit from the
                                    operational, regulatory and compliance
                                    internal audit functions;

                           o        Hiring additional financial internal
                                    auditors;

                           o        Adding additional expertise to the audit
                                    committee;



Mr. Kevin Vaughn
August 23, 2005
Page 10

                           o        Engaging an outside consultant to assist
                                    with improving our internal control
                                    methodologies and testing in conjunction
                                    with the Sarbanes Oxley Act of 2002;

                           o        Establishment of a formal disclosure
                                    committee process for periodic review of
                                    financial statements;

                           o        Complete development of a comprehensive
                                    program to review, evaluate and improve
                                    security covering user access rights to
                                    certain critical applications.

                  Although we believe that each of the weaknesses will be
                  remediated, there can be no assurance that the remediation
                  will be completed by December 31, 2005."



         Flagstar Bancorp hereby acknowledges that:

         o        it is responsible for the adequacy and accuracy of the
                  disclosure in the filings;

         o        Staff comments or changes to disclosure in response to staff
                  comments in the filings reviewed by the staff do not foreclose
                  the Commission from taking any action with respect to the
                  filing; and

         o        it may not assert staff comments as a defense in any
                  proceeding initiated by the Commission or any person under the
                  federal securities laws of the United States.



                        [signature is on following page]






Mr. Kevin Vaughn
August 23, 2005
Page 11

         We trust that the forgoing is responsive to your comments. If you have
any questions regarding the foregoing or require further information, please
contact the undersigned at (248) 312-5580 or our outside counsel Jeremy Johnson
of the Kutak Rock LLP law firm at (202) 828-2463.

                                        Sincerely,

                                        FLAGSTAR BANCORP, INC.



                                        /s/ Paul D. Borja
                                        ---------------------------------------
                                        By:   Paul D. Borja
                                        Its:  Executive Vice President and Chief
                                              Financial Officer