EXHIBIT 31.1
                     RULE 13A-14(a)/15D-14(a) CERTIFICATION
                           OF CHIEF EXECUTIVE OFFICER

I, Mark T. Hammond certify that:

1)       I have reviewed this quarterly report on Form 10-Q of Flagstar Bancorp,
         Inc. (the "registrant");

2)       Based on my knowledge, this report does not contain any untrue
         statement of a material fact or omit to state a material fact necessary
         to make the statements made, in light of the circumstances under which
         such statements were made, not misleading with respect to the period
         covered by this report;

3)       Based on my knowledge, the financial statements, and other financial
         information included in this report, fairly present in all material
         respects the financial condition, results of operations and cash flows
         of the registrant as of, and for, the periods presented in this report;

4)       The registrant's other certifying officer and I are responsible for
         establishing and maintaining disclosure controls and procedures (as
         defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
         registrant and have:

         a)       designed such disclosure controls and procedures, or caused
                  such disclosure controls and procedures to be designed under
                  our supervision, to ensure that material information relating
                  to the registrant, including its consolidated subsidiaries, is
                  made known to us by others within those entities, particularly
                  during the period in which this report is being prepared;

         b)       evaluated the effectiveness of our disclosure controls and
                  procedures and presented in this report our conclusions about
                  the effectiveness of the disclosure controls and procedures,
                  as of the end of the period covered by this report based on
                  such evaluations; and

         c)       disclosed in this report any change in the registrant's
                  internal control over financial reporting that occurred during
                  the registrant's most recent fiscal quarter (the registrant's
                  fourth fiscal quarter in the case of an annual report) that
                  has materially affected, or is reasonably likely to materially
                  effect, the registrant's internal control over financial
                  reporting.

5)       The registrant's other certifying officer and I have disclosed, based
         on our most recent evaluation of internal control over financial
         reporting, to the registrant's auditors and the audit committee of the
         registrant's board of directors (or person performing the equivalent
         function):

         a)       all significant deficiencies and material weaknesses in the
                  design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  registrant's ability to record, process, summarize, and report
                  financial information; and

         b)       any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the
                  registrant's internal control over financial reporting.

Dated:  November 12, 2003                  /s/ Mark T. Hammond
                                           -------------------
                                           Mark T. Hammond
                                           President and
                                           Chief Executive Officer