Biennial Budgeting and Enhanced Oversight Act of 2011 - Amends the Congressional Budget Act of 1974 (CBA) to require: (1) biennial (instead of annual) budget resolutions, (2) biennial appropriations Acts, and (3) biennial government strategic and performance plans.
Defines the budget biennium as the two consecutive fiscal years beginning on October 1 of any odd-numbered year.
Makes conforming amendments to the Rules of the House of Representatives, the Balanced Budget and Emergency Deficit Control Act of 1985 (Gramm-Rudman-Hollings Act), and the CBA.