Do you need a permit for an AC unit, heat pump, or generator in Los Angeles, CA?
It depends on the details of your project.
Any new or changed heating or cooling system needs a mechanical HVAC permit.
Simple HVAC jobs can get an express permit with no plan check.
Systems of 500,000 BTU/h or more need an HVAC plan check.
A person last checked these rules on October 22, 2026. This is guidance only, so confirm with Los Angeles before you build.
Check your exact lot
Your zoning district sets the setbacks, and a flood zone can change the permit answer. Enter your address to see both.
Permits a AC unit, heat pump, or generator can need in Los Angeles
| Permit | When it applies |
|---|---|
| Mechanical HVAC permit | LADBS requires a mechanical permit for any new or changed heating or cooling system. |
| Electrical permit | A standby generator needs an electrical permit for its transfer switch. A new outdoor unit needs a new circuit and disconnect.Medium confidence |
| Gas piping permit | A gas or propane line to the equipment needs a fuel-gas permit.Medium confidence |
Local details
- Call 811 at least a few days before you dig footings or post holes. Utility locating is free.
- HOA covenants and deed restrictions can be stricter than city rules. Check yours before you build.
How to apply
- LADBS
- ZIMAS parcel and zoning lookup
- Phone: 311 (213-473-3231)
Common questions
- When does an AC unit, heat pump, or generator need a mechanical permit in Los Angeles?
- LADBS requires a mechanical permit for any new or changed heating or cooling system. Generators are covered by the electrical permit.
- Where do I apply for an AC unit, heat pump, or generator permit in Los Angeles?
- Apply through LADBS, or call 311 (213-473-3231).
Sources
- LADBS, Mechanical HVAC Permits. Checked 2026-10-22
Mechanical HVAC Permits are required for any installation or modification of heating/cooling systems...
- 2024 IRC R105.2, Work exempt from permit (text published by the City of Benson, AZ). Checked 2026-10-19
One-story detached accessory structures, provided that the floor area does not exceed 200 square feet. Fences not over 7 feet high. Decks not exceeding 200 square feet in area, that are not more than 30 inches above grade at any point, are not attached to a…