2026 California energy code (Title 24) and what it means for your remodel.

Title 24 is California's energy efficiency code, and it touches more remodeling projects than most homeowners realize. Any project that alters lighting, exterior walls, windows, HVAC, or adds conditioned space likely requires Title 24 compliance documentation as part of the permit submittal. Understanding the basics helps you avoid plan-check rejections and design a more efficient home.

What is Title 24?

Title 24, Part 6 of the California Code of Regulations, sets energy efficiency standards for new construction and renovations. It covers building envelope, mechanical systems, water heating, lighting, and solar-ready design. The code is updated every three years; the 2026 cycle continues the push toward electrification, high-efficacy lighting, and better insulation.

Which remodels trigger Title 24 compliance?

Title 24 applies when your project involves:

• New or altered exterior walls, roofs, or floors. Adding insulation, replacing windows, or removing walls triggers envelope compliance.
• Lighting changes. Most remodeled areas must use high-efficacy LED lighting with controls.
• HVAC changes. New furnaces, air conditioners, ductwork, and heat pumps must meet efficiency standards.
• Water heating. New water heaters must meet efficiency and insulation requirements.
• Additions and ADUs. New conditioned space is fully subject to Title 24.
• Kitchen and bath remodels with electrical or ventilation changes. Range hoods, exhaust fans, and lighting may need compliance documentation.

Purely cosmetic work — painting, replacing cabinets in place, swapping a faucet — usually does not trigger Title 24.

What are the most common Title 24 requirements for remodels?

• High-efficacy lighting. LED fixtures and lamps in remodeled areas.
• Lighting controls. Dimmers, occupancy sensors, or vacancy sensors in certain rooms.
• Insulation. Minimum R-values for walls, ceilings, and floors that are opened.
• Air sealing. Sealing gaps around windows, doors, and penetrations.
• HVAC efficiency. Minimum SEER2, HSPF2, or AFUE ratings for new equipment.
• Water heater efficiency. Heat pump water heaters or high-efficiency tankless units in many cases.
• Solar-ready design. Some additions and new construction must include conduit and space for future solar.

How is Title 24 compliance documented?

A Title 24 consultant or energy rater prepares a compliance report using approved software. The report is submitted with the building permit plans. The report lists the measures being used to comply — insulation levels, window U-factors, HVAC efficiency, lighting watts per square foot, and so on.

Most California contractors either prepare these reports in-house or subcontract them. CaliFirst includes Title 24 documentation in the permit package for every project that requires it.

What happens if Title 24 is missing from my permit application?

The building department will reject the plans and request the compliance report. This typically adds 1 to 3 weeks to plan check, depending on how quickly the report can be produced and resubmitted. The easiest way to avoid delay is to include Title 24 in the original submittal.

How does Title 24 affect appliance and fixture choices?

• Induction cooktops are increasingly favored over gas in many jurisdictions.
• Heat pump water heaters may be required or strongly encouraged.
• EnergyStar appliances help meet efficiency targets.
• Exhaust fans must meet airflow and sound requirements.
• Range hoods in tight homes may require makeup air systems.

Your contractor or designer should flag these requirements during material selection.

Does Title 24 increase remodeling costs?

It can, but usually modestly. LED lighting, better insulation, and efficient appliances often pay for themselves through lower utility bills. The largest cost impacts come from major systems changes — heat pump water heaters, panel upgrades, and electrification — which may be required for additions or whole-home renovations.

FAQ

Does every remodel need Title 24 compliance? No. Cosmetic updates without electrical, lighting, or envelope changes usually do not trigger Title 24.

Who prepares the Title 24 report? A Title 24 consultant, energy rater, or qualified contractor prepares the compliance report using approved software.

How much does Title 24 documentation cost? For a typical remodel, $300 to $1,000 depending on project complexity. Additions and new construction cost more.

Can Title 24 delay my permit? Only if it is missing or incorrect. A complete submittal with Title 24 moves through plan check normally.

Does Title 24 require solar panels? Not for most remodels, but new additions and ADUs may need solar-ready design or, in some cases, solar panels depending on size and jurisdiction.

Begin the conversation

CaliFirst Remodel includes Title 24 compliance documentation in every permit package that requires it. Share your vision and our team will prepare a preliminary feasibility and energy-code review.