Butte County · Climate Zone 11

Title 24 reports in Chico.

CF1R and NRCC energy compliance for Chico projects: new homes, ADUs, additions, remodels and commercial work. From $200, back in two business days, with plan-check corrections included.

Architectural illustration of a modern California home in Climate Zone 11, Northern Sacramento Valley
Chico · Zone 11Northern Sacramento Valley · Cooling-driven design
11
Climate zone
Red Bluff
CEC reference city
Cooling
Design driver
2
Business-day turnaround
What the zone means here

Chico is in Climate Zone 11, Northern Sacramento Valley

Genuinely hot valley summers with cold snaps in winter. Both loads are significant.

Where Chico projects usually lose margin: Duct leakage and attic insulation are the two biggest levers. Field verification is nearly always in play.

Every compliance run for a Chico project uses the CEC weather file for Red Bluff, the reference station for Zone 11. That file, not the address, is what the energy budget is calculated against, which is why getting the zone right matters more than anything else about location.

Read Zone 11 in full →
Typical Chico scope
A

ADUs and conversions

From $200. Most are exempt from the solar PV requirement; envelope and equipment rules still apply in full.

B

Additions and remodels

From $300. Modelled as two zones, existing and addition, so the new floor area is judged on its own standard.

C

New homes

From $300, including solar PV and battery sizing to the 2025 code.

D

Commercial & TI

Quoted on a call. NRCC envelope, mechanical and lighting plus the performance run.

Confirm it yourself

Chico climate zone lookup

Pre-set to Zone 11. Enter any other Chico-area ZIP to check a specific address.

California building climate zones 11121216341351496108157

Schematic: nodes are placed for legibility, not survey accuracy. Zone boundaries follow ZIP code lines.

Climate Zone

Enter a city or ZIP code, or click any numbered node on the map, and we'll tell you the zone, what drives the design there, and where projects usually lose margin.

Zone assignment is set by the California Energy Commission and follows ZIP code boundaries. A handful of cities straddle two zones. If yours is one of them we will confirm it from the address for free.

Questions

Title 24 in Chico

How much does a Title 24 report cost in Chico?

The same published rates as everywhere else in California: from $200 for an ADU or garage conversion, and $300 for an addition or remodel. Commercial NRCC work and multifamily are quoted on a call. Chico projects are not priced differently. The calculator on this site gives you the exact number.

Which climate zone is Chico in?

Chico sits in California Climate Zone 11, Northern Sacramento Valley. The compliance model runs against the CEC weather file for Red Bluff, and design is driven mainly by cooling.

Zone assignment follows ZIP code boundaries, so a large city can span more than one zone. Send us the project address and we'll confirm it free.

Do you work with Chico building departments?

Yes. Reports are produced to the state standard, which is what every California jurisdiction plan-checks against, and the forms sheet is sized to drop straight into your plan set. If Chico plan check comes back with a comment on the energy documents, the correction is included at no charge.

Also serving

All 58 California counties and all 16 climate zones. See the full list.

A crisp white two-storey house with deep roof overhangs on an open lawn under a bright sky
Chico · Butte CountyClimate Zone 11 · Northern Sacramento Valley
Ready when you are

Have a Chico project? Send the plans.

Fixed price and a delivery date the same day, then signed forms in five business days.

Or call (909) 914-0305 and you'll get the engineer, not a receptionist.