**Exhibit          31.2 **

**CERTIFICATIONS          **

| 1. | I                  have reviewed this quarterly report on Form 10-Q of BankUnited                  Financial                  Corporation; |
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| 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; |
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| 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; |
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| 4. | The                  registrant’s other certifying officer(s) 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: |
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| (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 be others within                    those                    entities, particularly during the period in which this report                    is being                    prepared; |
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| (b) | Evaluated                    the effectiveness of the registrant’s 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 evaluation; and |
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| (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 affect, the registrant’s internal control over financial                    reporting; and |
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| 5. | The                  registrant’s other certifying officer(s) 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 persons performing the equivalent functions): |
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| (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 |
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| (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. |
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| /s/                HUMBERTO                L.                LOPEZ                                                         |
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| Humberto                L. Lopez Senior                Executive Vice President and Chief                Financial Officer |

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