FHA Multifamily Loan Limit Adjustment Act of 2007 - Amends the National Housing Act to increase high-cost area and project-based additional mortgage loan limits for Federal Housing Administration (FHA)-insured mortgages for: (1) rental housing; (2) cooperative housing; (3) rehabilitation and neighborhood conservation housing insurance; (4) moderate income and displaced family housing; (5) housing for the elderly; and (6) condominiums.