Verified 2026-05-01
DOB mechanical permit and exemption check for HVAC replacement
NYC DOB's owner guidance points mechanical permit exemptions to 1 RCNY 101-14, and DOB's general permit page says most construction requires approval and permits. HVAC replacement in New York City should be checked against DOB's mechanical exemption categories and routed through DOB NOW when the work involves non-exempt equipment, ductwork, penetrations, structural support, electrical wiring, plumbing, or another alteration scope.
Official application