He subsequently ran and defeated fellow incumbent Joni Yoswein in the new 44th Assembly District, which includes the neighborhoods of Flatbush, Kensington, Park Slope and Windsor Terrace.

The report concerned how the Pataki administration undermined services for the severely disabled as a result of the closure of a Medicaid office serving those clients in the fall of 2004.

In 1998 and 1999, Brennan helped win funding for 5,000 new units of housing for the mentally ill in New York State.

[citation needed] As Chair of the Cities Committee, Brennan authored two new laws in 2007, to improve public health and safety in construction and development in New York City—one cracking down on the filing of fraudulent building plans to the New York City Department of Buildings, and the other compelling the acquisition of insurance for excavations that might damage adjacent properties.

[citation needed] Brennan also authored the Expansion of the Real Property Partial Tax Exemption to low and moderate-income senior citizens in co-ops and condos.