HVAC Permits in Los Angeles
Whether you're replacing a furnace, installing a new air conditioner, or upgrading to a mini-split system, understanding HVAC permit requirements in Los Angeles can save you from costly delays and legal trouble.
Do You Need a Permit?
Almost all HVAC work in LA requires a permit. The exceptions are minor repairs that don't affect system capacity or configuration. Installing or replacing any of the following always requires a permit:
- Central air conditioning or heating systems
- Ductwork (new or significant modification)
- Mini-split or multi-zone systems
- Heat pumps
- Boilers and radiant heating systems
The 500,000 BTU Limit
This is the key threshold for express permit eligibility. HVAC systems under 500,000 BTU/hour qualify for the 5-day express permit process at LADBS. Most residential systems fall well below this limit � a typical 5-ton residential AC unit is about 60,000 BTU, for example. Commercial and industrial-scale systems exceeding 500,000 BTU require regular plan check (~3 months).
Express vs Regular Permit for HVAC
To qualify for express processing (5 days), your HVAC project must meet these criteria:
- System capacity under 500,000 BTU/hour
- Same size/type replacement (replacing like-for-like)
- No structural modifications to accommodate new equipment
- No electrical panel upgrade required (or panel upgrade is handled separately)
If you're upgrading your system � say, going from a 2-ton to a 4-ton unit � this may still qualify for express if the capacity stays under 500,000 BTU, but the same size/type rule may become an issue. Our HVAC permit specialists can assess your specific situation.
Title 24 Compliance
All HVAC installations in California must comply with Title 24 energy efficiency standards. This includes proper insulation of ducts, appropriate SEER ratings for new equipment, and in some cases, commissioning reports. We handle all Title 24 documentation as part of our express permit service.