New York Mechanical / HVAC Code: IMC 2025

New York follows IMC 2025 as the basis for mechanical / hvac work. Permits and inspections are issued by the local Authority Having Jurisdiction (AHJ), which may publish additional amendments.

The 2025 PCNYS (effective 2025-12-31) is based on the 2024 IPC. New York City publishes its own Plumbing Code. (Mechanical code typically derives from the plumbing-code family.)