Subcontractor Fairness Act of 2009 - Amends the Federal Property and Administrative Services Act of 1949 to require any offeror responding to an executive agency's solicitation for competitive proposals for the procurement of property or services in an amount greater than $550,000 or for construction in an amount greater than $1 million to enter into an agreement that provides that each subcontract to be awarded in the performance of the contract. shall: (1) become a valid subcontract if the offeror is awarded the prime contract; and (2) include the identity of the subcontractor, the scope of work to be performed under the subcontract, and the dollar amount of the subcontract. Requires a copy of each subcontracting agreement to be included in any competitive proposal submitted.
Establishes the same requirements for defense contracts.