Santa Clarita Climate Zone & Energy Code

Climate Zone: CEC Climate Zone 9 (Santa Clarita Valley / north LA County). IECC Climate Zone 3B. The enclosed Santa Clarita Valley produces hot, dry summer conditions — 98°F cooling design — similar to the San Fernando Valley. The 30°F heating design reflects moderate but not extreme winter conditions.

Energy Code & Manual J Requirement: California Title 24 Part 6 (2025 edition, effective January 1, 2026). ACCA Manual J required for residential HVAC sizing. All Santa Clarita and LA County jurisdictions enforce Title 24.

Local Electric Utility: Southern California Edison (SCE)

Building Department: City of Santa Clarita Community Development Department

Local Trade Association: ACCA California