A Title 24 energy compliance report is required for most building permits in California that involve changes to the building envelope, HVAC, lighting, or water heating systems. This includes new construction, additions, alterations, and some change-of-use projects.
You typically need a Title 24 report for:
- New single-family homes and multifamily buildings
- ADUs and JADUs (detached, attached, or garage conversions)
- Room additions and conditioned-space expansions
- HVAC replacements in many jurisdictions
- Window replacements affecting a significant portion of wall area
- Multifamily tenant improvements involving new mechanical or lighting work
You typically do NOT need one for:
- Pure cosmetic remodels (flooring, paint, cabinets)
- Roof repairs that do not alter insulation
- Electrical panel upgrades not tied to new construction
Important: Requirements vary by jurisdiction and project scope. Always confirm with your local building department — but if you are pulling a permit for anything structural or mechanical, a Title 24 report is very likely required.