New York City Council (2022–present)
In December 2020, Brewer announced her candidacy for her former City Council seat in the 2021 New York City Council election. She lost the Jim Owles Liberal Democratic Club endorsement to Democrat Sara Lind and requested a second endorsement vote from the organization prior to the June Democratic Primary in 2021. On November 2, 2021, Brewer defeated Republican Nancy Regula (wife of Curtis Sliwa) with over 82% of the vote. Brewer's main progressive Democratic primary challenger in 2021, Sara Lind, was not reappointed to Manhattan Community Board 7 when her position came up for renewal in 2023.
Brewer chairs the City Council's Committee on Oversight and Investigations. She is a member of the Committees on Consumer and Worker Protection, Finance, Governmental Operations, Higher Education, and Rules, Privileges, and Elections. In addition, she is a member of the Manhattan Delegation, the Women's Caucus, and sits on the Budget Negotiating Team. She left the Progressive Caucus in 2023, and returned in 2026.
Brewer successfully ran for the City Council's new 6th district seat in 2023.
In May 2026, Brewer opposed a bill that would ban 24-hour "live-in shifts" by workers caring for disabled people, agreeing with the goal of the bill, but saying she was concerned about its unintended effects.
In July 2026, Brewer headed a committee hearing to authorize a raise in salary for all citywide elected officials by 18 percent. She said other major cities in the United States have raised their officials' salaries with smaller budgets and there are New York City government staffers who get paid more than the mayor.
Brewer is a member of the Vote Blue Coalition, a progressive group and federal PAC created to support Democrats in New York, New Jersey, and Pennsylvania through voter outreach and mobilization efforts.