New York City voters have approved all five ballot measures put forward by Mayor Zohran Mamdani in the November 3 midterm elections, including a contested proposal that arts organisations say will weaken public oversight of landmark sites and city-owned land. The Municipal Art Society of New York and the New York Landmarks Conservancy had both objected to parts of Proposal 3, which speeds up review procedures for projects involving public land.

Proposal 3 covers three areas: street safety construction, the sale or leasing of city-owned property, and the acquisition of office space for city employees. Its most contentious element replaces the seven-month Uniform Land Use Review Procedure with a 90-day fast lane, known as the Expedited Land Use Review Procedure, for projects judged to have little impact on their surroundings. Under the new route, city-owned landmarked property can be sold without final approval from the City Council, and land that cannot be developed can be sold to neighbouring owners without a public auction.

The measure also excuses the Department of Transportation from notifying elected officials and community boards before starting major safety projects, requiring notification only once construction begins. Consultations with the Police Department, the Fire Department, the Mayor's Office for People with Disabilities and the Department of Small Business Services remain mandatory. A final section removes hearing and approval requirements for acquiring or leasing office space for city employees, leaving those decisions to the commissioner of the Department of Citywide Administrative Services, Yume Kitasei, although community boards and borough presidents must still be notified.

Andrea Goldwyn, director of public policy at the New York Landmarks Conservancy, said residents were already calling her organisation about new projects appearing in their neighbourhoods without warning, and warned that the change would erode a long tradition of public participation. The five measures came from the Commission on Government Efficiency, a 15-member panel assembled by Mamdani to streamline city operations through changes to the City Charter, including reducing paperwork for contractors and setting aside an emergency reserve fund.