Title 24 explained
What Title 24 Part 6 is, what a CF1R is, and the three design pathways every California residential project chooses between.
California climate zones
How the state's 16 climate zones change your prescriptive baseline — insulation R-values, window U-factors and SHGCs, roof assembly.
Glossary
CF1R, CF2R, CF3R, ECC, CHEERS, ADU, SHGC, U-factor, HSPF2 / SEER2 / EER2, JA4 — the acronyms you'll meet on a Title 24 project.
Frequently asked questions
Pricing, turnaround, refunds, who signs the CF1R, how design options compare, what happens if your plans are messy.
How much does Title 24 cost?
The 2026 California market range, what drives the price, what's included in our flat $200 fee, and turnaround vs. competitors.
Plan-check correction letters
How to respond when your AHJ returns Title 24 corrections — common citations, how to fix them cleanly, and when to start over.
For designers & architects
Code references, equipment-lookup directories (AHRI, NEEA, NFRC), best practices for the uploaded plan PDF.
CHEERS registry
The state-approved registry that issues CF1R certificates in California — what it does, links, and how the signature flow works.
ZIP → climate zone lookup
Type a California ZIP code and find its Title 24 climate zone (CZ1–CZ16) plus the prescriptive baseline that applies to projects in that zone.
California cities we serve
We run Title 24 compliance for residential projects in every California jurisdiction. The pages below cover the highest-volume markets — each one pulls the prescriptive baseline for that city's climate zone and cross-references the local building department that will receive the submitted CF1R.
Los Angeles · San Diego · San Jose · San Francisco · Sacramento · Long Beach · Oakland · Fresno · Bakersfield · Anaheim
What this site does
We generate a Title 24 Part 6 residential compliance package — including the CF1R (Certificate of Compliance — Residential) — for California single-family, ADU, addition, and alteration projects. You upload your architectural plan PDF, confirm the inputs we extracted, pick a design option, and receive a signed CF1R PDF you can submit alongside your permit drawings. Most projects are documentation-ready within about 24 hours of upload, at a flat $200 per project.
The "compliance verification" step confirms the project meets California's energy targets for its climate zone using the state's prescriptive baseline for the building's location and scope. The signed CF1R is what your local building department actually requires; everything else is supporting work.