Frequently Asked Questions

Common questions about Title 24 compliance

When do I need a Title 24 report?

You need a Title 24 report for any new construction, additions over 1,000 square feet, or major alterations that affect building systems (HVAC, lighting, envelope). The report must be submitted with your building permit application.

How long does it take to generate a Title 24 report?

With CertifiedT24, you can generate a complete Title 24 report in as little as 15-30 minutes for standard projects. Complex commercial buildings may take 1-2 hours. Traditional methods can take several days.

What's the difference between CF-1R, CF-2R, and CF-3R forms?

CF-1R (Certificate of Compliance) documents the design compliance and is submitted with permit applications. CF-2R (Certificate of Installation) verifies proper installation of equipment and systems. CF-3R (Certificate of Verification) documents field verification and testing by a HERS rater.

Do I need a HERS rater for my project?

HERS (Home Energy Rating System) raters are required for certain verification tasks including duct testing, refrigerant charge verification, and fan efficacy testing. Not all projects require all verifications. Your Title 24 report will specify which verifications are required.

What climate zone is my project in?

California has 16 climate zones based on weather patterns. You can determine your climate zone using the CEC's online climate zone tool by entering your project address. Climate zones affect the energy efficiency requirements for your building.

Can I use prescriptive compliance or do I need performance?

Both are valid compliance paths. Prescriptive compliance follows specific requirements for each building component and is simpler but less flexible. Performance compliance models the entire building's energy use and allows trade-offs between components, offering more design flexibility.

What happens if my Title 24 report is rejected?

If your report is rejected by the plan check agency, you'll need to address the specific issues cited and resubmit. Common reasons for rejection include incorrect climate zone, missing data, non-compliant equipment, or calculation errors. CertifiedT24's validation tools help prevent rejections.

Do solar panels satisfy Title 24 requirements?

Solar photovoltaic systems can help achieve compliance by offsetting energy use, but they don't exempt you from Title 24 requirements. Buildings must still meet mandatory measures and baseline efficiency standards. Solar is credited in the performance compliance calculations.

How often are Title 24 standards updated?

Title 24 standards are updated every three years. The current standards (2025 Title 24) took effect January 1, 2026. The next update will likely be effective in 2029. Projects are required to comply with the standards in effect when the permit application is submitted.

What is the Title 24 compliance margin?

The compliance margin is the difference between your building's energy performance and the maximum allowed. A positive margin means your design exceeds minimum requirements. Some utilities and programs offer incentives for designs that exceed Title 24 by a certain percentage.

Do additions and alterations need full Title 24 compliance?

The requirements depend on the scope of work. Additions must comply with Title 24. Alterations have different requirements based on whether they're classified as minor alterations or major alterations. Altered systems and components must meet current standards.

Can I submit my Title 24 report electronically?

Most California jurisdictions now accept electronic submission of Title 24 reports, either through email, online portals, or the California Energy Commission's data registry system. Check with your local building department for their specific submission requirements.

What is TDV (Time Dependent Valuation)?

TDV is the metric used in Title 24 performance compliance to value energy based on when it's used. Energy used during peak demand periods has higher TDV values. This encourages building designs that reduce peak-period energy use and shift consumption to off-peak times.

How much does Title 24 compliance cost?

Compliance costs vary by project size and complexity. Energy consultant fees typically range from $500-$2,000 for residential projects and $2,000-$10,000+ for commercial projects. CertifiedT24 subscriptions start at a fraction of consultant fees, allowing architects and engineers to generate their own reports.

What are mandatory measures in Title 24?

Mandatory measures are minimum requirements that all buildings must meet regardless of the compliance path chosen. These include minimum equipment efficiencies, insulation levels, air sealing requirements, lighting controls, and other specific provisions that cannot be traded off.

Do I need Title 24 compliance for remodels?

It depends on the scope of work. Remodels that don't alter building systems generally don't require compliance reports. However, if you're replacing HVAC systems, adding square footage, or making significant envelope changes, Title 24 compliance is typically required.

Still Have Questions?

Our team of Title 24 experts is here to help. Contact us for personalized assistance with your specific project requirements.