Code & credentials

4 entries

Plain English

Title 24 explained

What Title 24 Part 6 is, what the Title 24 report is, and the three design pathways every California residential project chooses between.

The credential

What is an ECC Rater?

The Energy Code Compliance Rater credential explained, what they can do that paper-only consultants can't.

For everyone

CHEERS registry

The state-approved registry that issues Title 24 report certificates in California, plus how the signature flow works.

Updated weekly

Code updates (changelog)

What's changed in the 2025 Energy Code, CEC errata, prescriptive table tightenings, residential-design impact.

Climate & envelope

2 entries

Plain English · Technical

California climate zones

How the 16 climate zones change your prescriptive baseline, R-values, U-factors, SHGCs, roof assembly.

Design & equipment

3 entries

§150.1(c)14

PV mandate decoded

When §150.1(c)14 applies, when it doesn't, the sizing formula with per-CZ factors, and the Exception 2 waiver.

Technical

HVAC sizing for CA residential

ACCA Manual J basics, prescriptive HSPF2 / SEER2 / EER2 tiers (including CZ12's tightening), common mistakes.

Technical

HPWH selection

NEEA Tier 3 vs Tier 4 crosswalk, per-CZ UEF requirements, sizing by NDU and bedroom count.

Scope & process

5 entries

Scope reference

Add+Alt paths

Newly Constructed vs Addition+Alteration vs Alteration Only vs Add-Alone, plus the 2025 ADU reinterpretation.

For designers

Designer's CF1R checklist

Eight inputs to have ready before requesting a CF1R, address, CFA, bedrooms, ceiling height, license, scope.

For contractors

Contractor's permit-readiness checklist

What the Title 24 report covers in the permit package, what it doesn't, and how CF2R / CF3R close out the chain.

Reference

Plan-check correction letters

How to respond when your AHJ returns Title 24 corrections, common citations, how to fix cleanly.

Technical

For designers & architects

Code references, equipment-lookup directories (AHRI, NEEA, NFRC), best practices for the uploaded plan PDF.

Pricing & policy

2 entries

Pricing

How much does Title 24 cost?

The 2026 California market range, what drives the price, what's included in our flat $200 fee, turnaround.

Coming soon

Case studies

Documented projects, climate zone, scope, prescriptive baseline, design path chosen, outcome.

Quick reference

2 entries

40+ terms

Glossary

CF1R, CF2R, CF3R, ECC, CHEERS, ADU, SHGC, U-factor, HSPF2 / SEER2 / EER2, JA4, the acronyms you'll meet.

Plain English

Frequently asked questions

Pricing, turnaround, refunds, who signs the Title 24 report, how design options compare, what about messy plans.

Free Title 24 tools

5 calculators

ZIP → CZ

Climate zone lookup

Type a California ZIP code, get the Title 24 climate zone plus prescriptive baseline link.

Compare

Envelope baseline

Side-by-side Prescriptive vs HP Envelope vs Hybrid for any CZ + scope.

§150.1(c)14

PV sizer

Required PV in kWdc, handles scope exemptions and the Exception 2 waiver.

Min specs

Equipment baseline

Minimum-compliant HVAC + DHW equipment per CZ and project scope.

Pass / fail

Glazing checker

Validate window U-factor, SHGC, and floor-area ratio against the prescriptive baseline.

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 pulls the prescriptive baseline for that city's climate zone and cross-references the local building department that will receive the submitted Title 24 report.

Los Angeles · San Diego · San Jose · San Francisco · Sacramento · Long Beach · Oakland · Fresno · Bakersfield · Anaheim · Santa Ana · Riverside · Chula Vista · Stockton · Irvine · Fremont · San Bernardino · Modesto · Fontana · Oxnard · Moreno Valley · Huntington Beach · Glendale · Santa Clarita · Garden Grove · Oceanside · Rancho Cucamonga · Santa Rosa · Ontario · Elk Grove · Lancaster · Corona · Palmdale · Salinas · Pomona · Hayward · Escondido · Torrance · Sunnyvale · Orange · Fullerton · Pasadena · Thousand Oaks · Visalia · Roseville · Concord