Required Documents

HVAC / Mechanical Permit Required Documents in Los Angeles

What documents does LADBS require for a Los Angeles HVAC or mechanical permit application?

Documentation Needed for a Los Angeles HVAC Permit

Submitting complete documentation with your Los Angeles HVAC permit application is the most effective way to avoid delays and correction cycles with LADBS. The specific documents required depend on whether your project qualifies for an express permit or requires a plan check.

Basic Information Required for All HVAC Permit Applications

• Property address and assessor parcel number (APN)
• Description of the HVAC work being performed
• Equipment type (furnace, AC, heat pump, packaged unit, etc.)
• Equipment manufacturer, model number, and capacity (BTU/H, tons, or CFM)
• Fuel type (natural gas, electric, propane)
• Applicant name and CSLB license number (C-44 or C-20) for commercial projects
• LADBS mechanical permit application form

Equipment Specifications and Data Sheets

LADBS may require manufacturer data sheets and specifications for the HVAC equipment being installed, particularly for new installations and commercial projects.

• Manufacturer product data sheet showing model, capacity, and energy ratings
• SEER2/EER2 rating documentation for cooling equipment
• AFUE rating documentation for gas heating equipment
• Refrigerant type and charge specification
• Equipment installation instructions and clearance requirements

Plans and Calculations for Plan Check Projects

Projects requiring a formal HVAC Plan Check must submit mechanical plans and supporting calculations along with the permit application.

• Mechanical system layout plan showing equipment location and duct routing
• Duct system diagram with sizing calculations
• Manual J load calculation report demonstrating proper system sizing
• California Title 24 energy compliance documentation (CF1R, CF2R forms)

• Combustion air and venting diagrams for gas-fired equipment
• Gas line sizing calculations if new gas piping is involved

Additional Documentation for Commercial HVAC Projects

Commercial HVAC projects in Los Angeles may require additional engineering documentation, including mechanical plans stamped by a licensed mechanical engineer, smoke control system engineering where applicable, and product conveying ventilation calculations for industrial applications.

Need Help With Your Permit?

Describe your project at app.zermit.ai and Zermit AI will identify which Los Angeles permits may be required, expected timelines, and documentation you will need to prepare.

Looking for a Licensed Contractor in Los Angeles?

Explore licensed contractors and remodeling professionals on zermit.ai/contractors who can assist with permitted work and inspections.