Climate Zone 5: Central Coast South
Mild coastal climate with cool nights.
Every Title 24 energy calculation uses the climate zone of the building’s physical location. In Zone 5, the climate is mild / balanced, which shapes which building features have the most effect on compliance.
Typical project considerations
- Low cooling loads; heating and water heating dominate.
- Good conditions for heat-pump performance.
General guidance only — requirements depend on building type, scope and the code edition in effect for your permit application.
Example communities
Santa Maria · San Luis Obispo · Lompoc
Official references
Frequently asked questions
Where is California Climate Zone 5?
Climate Zone 5 (Central Coast South) covers areas such as Santa Barbara & San Luis Obispo coast. Its representative weather city in CEC data is Santa Maria. Boundaries don’t follow city limits, so confirm by address.
Does Climate Zone 5 change my Title 24 requirements?
Yes. All Energy Code calculations use the project’s climate zone, which affects prescriptive values such as insulation and window performance and how heating and cooling are weighted in performance modeling.
What report do I need?
Single-family projects use CF1R, low-rise multifamily uses LMCC and nonresidential projects use NRCC forms — regardless of climate zone.
Ready to get your Title 24 report?
Upload your plans in minutes. We’ll handle the modeling, the forms and the plan-check revisions.