Title 24 resource centre
Clear, sourced answers about California energy compliance — written for homeowners, designers and contractors.
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4 min read Building PermitsDocuments you need for a Title 24 report
A checklist of plans and information to send your energy consultant for a fast, accurate Title 24 report.
3 min read Residential Energy Compliance2025 Energy Code: what changed for homes and ADUs
The 2025 California Energy Code took effect January 1, 2026. Here are the changes that matter most for residential projects.
4 min read California Climate ZonesCalifornia’s 16 building climate zones, explained
Why the CEC divides California into 16 climate zones, how to find yours, and how the zone changes Title 24 requirements.
4 min read ADU ComplianceADU Title 24 requirements under the 2025 Energy Code
What California ADU owners should know about energy compliance: CF1R reports, heat pumps, solar PV and garage conversions.
5 min read Title 24 BasicsHow much does a Title 24 report cost in California?
What drives the price of a Title 24 report — project type, size, unit count and turnaround — plus how our transparent estimator works.
3 min read Building PermitsWhen is a Title 24 report required?
New construction, additions, ADUs and many alterations need Title 24 energy compliance in California. See which projects trigger it.
4 min read CF1R and LMCCCF1R vs LMCC: what’s the difference?
CF1R is for single-family residential; LMCC is for low-rise multifamily. Here’s how to tell which your project needs.
3 min read CF1R and LMCCWhat is a CF1R? Certificate of Compliance explained
The CF1R is the residential Certificate of Compliance for California’s Energy Code. Learn what it shows, which variant you need and how it differs from CF2R and CF3R.
4 min read Title 24 BasicsWhat is a Title 24 report?
A plain-English explanation of California Title 24 energy reports: what they contain, who needs one, and how they fit into the permit process.
5 min readReady to get your Title 24 report?
Upload your plans in minutes. We’ll handle the modeling, the forms and the plan-check revisions.