Energy Efficiency Modernization Act of 2009 - Directs the Secretary of Housing and Urban Development (HUD) to make: (1) payments (green dividends) to owners of assisted multifamily rental housing projects who undertake utility cost-saving measures; and (2) loans funded from residual receipts to owners of assisted multifamily rental housing projects for undertaking green retrofit measures for such projects.
Directs the Comptroller General to conduct a study and report to Congress on the benefits of a federal statutory exemption from compliance with state and local building codes to enable and encourage the construction and installation in assisted multifamily rental housing projects of distributive energy generation and water efficiency measures.
Requires owners of assisted multifamily rental housing projects to report to the Secretary on consumption of electricity, water, gas, and other utilities by such projects.