Do I need a permit for an HVAC or AC replacement in New York City, NY?

A packaged A/C unit up to 5 tons in an existing building (including window and sleeve units) can be exempt. Other HVAC work may need a permit.

What changes the answer

• Packaged A/C up to 5 tons: may be exempt

Note: We did not confirm rules for furnaces, boilers or central systems.

Cost

Fee not extracted; see NYC DOB fees. Unverified, confirm locally

Fee source: https://www.nyc.gov/site/buildings/index.page

Where to apply

NYC Department of Buildings (DOB NOW)

Permitting authority: NYC Department of Buildings (DOB). Covers all five boroughs. Landmarked properties need Landmarks Preservation Commission approval even when DOB needs no permit. Many projects must be filed by a licensed professional or licensed trade. See also: how to apply for a building permit.

Official sources

“Packaged air-conditioning unit not exceeding 5 tons rated capacity, installed in an existing building, including installations in existing windows or in existing sleeves under windows, and that is not part of an alteration that otherwise requires a permit.”

Source: https://www.nyc.gov/assets/buildings/rules/1_RCNY_101-14.pdf

Verified: 2026-10-19 · Status: verified · Confidence: medium