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Window replacement in California is a permitted alteration governed by the Energy Code, the Building Code and the Residential Code. Every statement here is tied to a cited source.
Every Orange County city requires a building permit for window replacement, including like-for-like retrofit work. Plan review verifies Title 24 fenestration values, safety glazing locations, and bedroom egress.
Technical reference
Orange County spans California Climate Zones 6 and 8. Replacement fenestration must meet prescriptive maximums of U-factor 0.30 and SHGC 0.23 under the 2022 Building Energy Efficiency Standards, certified by NFRC label and documented on a CF1R form.
Reviewed by Technical Review Board
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