Last updated: April 23, 2026
Title 24 Cool Roof Rules in San Diego, CA.
California Title 24 energy code sets reflectance and insulation standards that can apply when a San Diego roof is replaced. Whether it applies to your job depends on the roof type and slope.
Title 24 Cool Roof Rules in Central San Diego
San Diego has a wide mix of roof types, and low-slope sections on additions or converted flats are the pieces most likely to trigger Title 24 reflectance requirements during a permit review.
What Title 24 means for a San Diego re-roof
Title 24 is the statewide California Energy Code, and it can set reflectance and related requirements on certain roof replacements, particularly low-slope roofs. San Diego falls within California climate zone 7 or 10 depending on exact location, and the applicable requirement can shift with that zone, the roof slope, and whether the project is a full re-roof or new construction. A roofer pulling your permit through the City of San Diego Development Services Department confirms which requirements apply and documents compliance as part of the permit package, so this is not usually something a homeowner has to research alone. Ask your roofer directly whether your project triggers Title 24 cool-roof requirements before materials are ordered.
City of San Diego roofing covers the broadest material and age mix in the county. Downtown high-rise low-slope membrane, 1920s craftsman composition in North Park and Hillcrest, 1950s-70s slab-and-tile in Clairemont and Bay Park, and newer master-plan tile in Pacific Highlands Ranch all run on the same dispatch.
We connect San Diego owners across Hillcrest, North Park, South Park, Point Loma and beyond with vetted local roofers who quote after seeing the roof, not over the phone.
San Diego Title 24 cool-roof compliance questions
Does Title 24 apply to every roof replacement in San Diego?
Not automatically. Title 24 cool-roof provisions apply most consistently to low-slope roofs and depend on the climate zone and project type. Steep-slope composition and tile roofs in San Diego are affected less often. Your roofer confirms which rules apply to your specific job.
What is a cool roof and why does California require it?
A cool roof uses materials with higher solar reflectance, so the roof surface and the attic below stay cooler. California built the requirement into Title 24 to reduce cooling energy use statewide. In San Diego, the benefit is most noticeable on homes with less shade or a south-facing low-slope section.
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