California Climate Zone 16 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 16 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 16 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 16 is one of them.
Why Climate Zone 16 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 16 and What It Means for Your Report
Climate Zone 16 covers California's mountain regions, including the Sierra Nevada and higher-elevation communities such as Tehachapi. It is the coldest zone in the state: winters are long, snow is common at higher elevations, and summers are generally short and mild.
Heating dominates the energy model in Zone 16 more than in any other zone. Insulation in walls, roofs and floors, careful air sealing, windows chosen to limit heat loss, and heating equipment that performs well in cold weather usually decide compliance. When a heat pump is proposed, its cold-weather performance and sizing matter a great deal. Cooling plays a minor role, so winter-focused measures generally have the biggest effect on the result.
Cities & areas in Climate Zone 16
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 16.
California Title 24 Climate Zone 16. Your project's zone is set by its address; see the California Energy Commission's official climate zone map for boundaries.
How Zone 16 affects HVAC
The zone's climate influences how heating and cooling are weighted in the model. Current Title 24 favors heat pumps statewide. Zone 16 HVAC requirements →
How Zone 16 affects windows
U-factor and SHGC targets are influenced by the zone's climate. Zone 16 window requirements →
How Zone 16 affects insulation
Wall, roof, and floor performance is measured against the zone's energy budget. Zone 16 insulation requirements →
How Zone 16 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 16, taken from the California Energy Commission's official table, or use the climate zone ZIP code lookup.
Title 24 Guides for Climate Zone 16
Start with the Climate Zone 16 Title 24 requirements overview, then read Zone 16 insulation requirements, Zone 16 heat pump requirements and Zone 16 window requirements, the areas that matter most in a cold mountain climate. The Zone 16 new home guide and Zone 16 ADU guide cover common projects, and Title 24 cost in Zone 16 covers pricing. For statewide background, see California Title 24 requirements and Title 24 calculations, and our Tehachapi city guide.
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