Title 24 reports in Irvine.
CF1R and NRCC energy compliance for Irvine projects: new homes, ADUs, additions, remodels and commercial work. From $200, back in two business days, with plan-check corrections included.
Irvine is in Climate Zone 8, Inland Orange County
One ridge back from the coast and noticeably hotter. Cooling is now the design driver.
Where Irvine projects usually lose margin: Cool roofs and duct location start to matter. West glazing needs shading or a low SHGC.
Every compliance run for a Irvine project uses the CEC weather file for Fullerton, the reference station for Zone 8. 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 8 in full →ADUs and conversions
From $200. Most are exempt from the solar PV requirement; envelope and equipment rules still apply in full.
Additions and remodels
From $300. Modelled as two zones, existing and addition, so the new floor area is judged on its own standard.
New homes
From $300, including solar PV and battery sizing to the 2025 code.
Commercial & TI
Quoted on a call. NRCC envelope, mechanical and lighting plus the performance run.
Irvine climate zone lookup
Pre-set to Zone 8. Enter any other Irvine-area ZIP to check a specific address.
Schematic: nodes are placed for legibility, not survey accuracy. Zone boundaries follow ZIP code lines.
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.
Title 24 in Irvine
How much does a Title 24 report cost in Irvine?
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. Irvine projects are not priced differently. The calculator on this site gives you the exact number.
Which climate zone is Irvine in?
Irvine sits in California Climate Zone 8, Inland Orange County. The compliance model runs against the CEC weather file for Fullerton, 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 Irvine 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 Irvine 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.
Have a Irvine 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.