Permit Required
Do you need a permit to install an HVAC system in Los Angeles, CA?
A mechanical permit is required to install A/C. Units under 500,000 Btu/h aggregate, and same-size/same-type replacements, qualify for an Express Permit (no plan check).
✓ Verified from official source
Source: LADBS Information Bulletin P/GI 2020-003 — Express Permits — Verified 2026-06-26
Permit rules vary by property and change over time. This is an informational guide, not legal advice — always confirm with Los Angeles Department of Building and Safety (LADBS) before starting work.
How to get the permit in Los Angeles
Building department
Apply online
Phone
(213) 482-7210
Code in force
2023 City of Los Angeles Residential Code (based on 2022 California Residential Code / CRC, derived from the IRC)
Need a permit pulled? Find a licensed HVAC contractor in Los Angeles
Licensed HVAC contractors near you can handle the permit and the work — compare pros on our directory.
Find a HVAC contractor in Los Angeles, CA →See Installing an HVAC System permit rules for other cities →