California Climate Zone 6 is one of the 16 official climate zones the California Energy Commission uses to set Title 24 energy budgets. Title 24 is a statewide California energy code. Climate Zone 6 does not have its own separate rules — the same statewide standards apply, with the energy budget calibrated to this zone's climate. Your project's exact requirements are determined when your specific address is modeled in CEC-approved compliance software.
What Climate Zone 6 means
Each of California's 16 zones reflects distinct temperature, humidity, and solar conditions, and each has its own energy budget under Title 24. Climate Zone 6 is one of them.
Why Climate Zone 6 matters for Title 24
Although the standards are statewide, the budget your design must meet is calibrated to the zone — which can shift the emphasis between insulation, HVAC, windows, and solar. The exact targets are determined when your address is modeled.
The Climate in Zone 6 and What It Means for Your Report
Climate Zone 6 is the coastal strip of Southern California, including Oxnard, Ventura, Santa Monica, Huntington Beach and Costa Mesa, where the ocean moderates temperatures year-round. Summers are warm but rarely extreme, winters are mild, and both heating and cooling loads are low compared with the inland valleys a few miles away.
With small heating and cooling loads, the energy budget in Zone 6 is tight in absolute terms, and water heating and ventilation make up a larger share of it. Heat pump water heating, reasonable window area and glazing performance, and a properly sealed duct system often decide compliance. Cooling still appears in the model, so large expanses of west-facing glass can work against a design even this close to the coast.
Cities & areas in Climate Zone 6
Climate zones are assigned by exact project address — often by ZIP code — and a single city can span more than one zone. The cities named on this page are examples only; we always confirm your zone from your project address. Browse our city Title 24 pages or read how cities map to Zone 6.
California Title 24 Climate Zone 6. Your project's zone is set by its address; see the California Energy Commission's official climate zone map for boundaries.
How Zone 6 affects HVAC
The zone's climate influences how heating and cooling are weighted in the model. Current Title 24 favors heat pumps statewide. Zone 6 HVAC requirements →
How Zone 6 affects windows
U-factor and SHGC targets are influenced by the zone's climate. Zone 6 window requirements →
How Zone 6 affects insulation
Wall, roof, and floor performance is measured against the zone's energy budget. Zone 6 insulation requirements →
How Zone 6 affects solar & heat pumps
Solar PV is required for most new low-rise residential statewide, with PV size set by your project; heat pumps are favored under current code. Solar & battery → · Heat pumps →
Common project types
Looking for a specific address? See every city and ZIP code in Climate Zone 6, taken from the California Energy Commission's official table, or use the climate zone ZIP code lookup.
Title 24 Guides for Climate Zone 6
The Climate Zone 6 Title 24 requirements page gives the full overview. From there, see Zone 6 heat pump requirements, Zone 6 window requirements and Zone 6 HVAC requirements. Coastal homeowners adding living space can use the Zone 6 ADU guide or Zone 6 garage conversion guide, and Title 24 cost in Zone 6 covers pricing. For statewide context, read California Title 24 requirements and Title 24 calculations. City guides include Santa Monica and Huntington Beach.
Climate zones follow the project address, not just the city name, and one city can straddle two zones. We confirm the exact zone from your address or ZIP code when we model the project; you can also check it yourself with our California climate zone lookup.
Title 24 pricing
- ADU — from $199
- Residential — from $245
- Multifamily — from $345
Standard turnaround: 2–3 business days. Rush (next business day): +$49 ADU / +$99 Residential / +$149 Multifamily. Super Rush (same day — typically completed within a few hours): +$150, subject to availability. Every report includes two revisions. See our pricing page.
What we need
- Architectural plans (PDF)
- Project address (this determines your climate zone)
- Scope of work
- Contact information
- Any plan-check comments (if available)
What we deliver
- Complete Title 24 energy report
- CF1R documentation (LMCC when applicable)
- CHEERS registration completed
- Professionally signed, permit-ready PDF package
- Two Revisions Included