California Title 24 Requirements for Windows
Window replacement guidance for Southern California homeowners.
Last reviewed: September 2026. Verify codes, manufacturer specs, and rebates before acting.
California's Title 24 energy standards set performance requirements—U-factor and Solar Heat Gain Coefficient—for windows by climate zone. Replacement windows should meet current standards.
Verify the applicable code version with your city building department and licensed contractor. We'll help you select compliant products.
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