What Is a Title 24 Energy Report?

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A building permit application can stall when the plans do not clearly demonstrate compliance with California’s energy-efficiency requirements. What Is a Title 24 Energy Report is an important question for homeowners, contractors, architects, designers, developers, and property owners preparing residential or commercial construction documents.

A Title 24 energy report is a project-specific analysis used to show how a proposed building design complies with the applicable California energy standards. The report evaluates energy-related features shown in the plans and produces compliance forms that become part of the permit-submittal package.

Depending on the project, the analysis may address insulation, windows, doors, roofing, HVAC equipment, ductwork, ventilation, water heating, lighting, controls, and other components that affect energy performance. The completed documentation helps the building department understand which compliance measures are included in the design.

Alternative Energy Systems brings more than 30 years of California energy-compliance experience to residential, multifamily, mixed-use, and commercial projects. AES reviews the available plans, identifies missing information, prepares the required calculations, and helps coordinate the energy documentation with the actual project design.

Learn more about the company on the About Us page, review previous professional relationships on the clients page, or call (626) 365-1518 to discuss your permit project.

What Is a Title 24 Energy Report Used For?

A Title 24 energy report provides documented evidence that a proposed project has been evaluated under the applicable California energy-efficiency requirements. It supports the permit process by translating the energy-related features of the design into calculations, compliance measures, and forms that can be reviewed alongside the architectural and mechanical plans.

The report may be required for projects involving:

New residential or commercial construction
Accessory dwelling units
Room additions and expanded conditioned space
Garage conversions
Major residential remodels
Multifamily building improvements
Commercial tenant improvements
HVAC replacements or mechanical-system changes
Window, insulation, or roofing upgrades
Commercial lighting and lighting-control work

The exact requirements depend on the project scope. A small alteration will not necessarily require the same analysis as a new home, detached ADU, apartment renovation, restaurant build-out, or office improvement.

For broader background on the governing standards, review what Title 24 is and the Title 24 energy code overview.

Why Is a Title 24 Energy Report Important Before Plan Check?

The energy report must agree with the information shown throughout the permit drawings. If the report lists one window performance value, HVAC system, insulation level, or water-heating method while the plans show something different, the inconsistency may result in correction comments.

Preparing the report before the plans are finalized gives the project team an opportunity to identify conflicting or incomplete information. This can reduce preventable revisions and help the architect, designer, contractor, and property owner understand which energy measures must remain in the final design.

A properly coordinated report can also help clarify:

Which energy features must appear on the plans
Which product specifications are still needed
Whether the proposed design meets the selected compliance path
Whether adjustments may be necessary before submittal
Which measures may require installation or field verification

The report does not replace the architectural plans. It works with them. The strongest permit package is one in which the calculations, forms, specifications, schedules, and construction notes communicate the same project requirements.

What Does a Title 24 Energy Report Include?

The contents of a Title 24 energy report depend on whether the project is residential or nonresidential and whether it involves new construction, an addition, an alteration, or another permitted scope.

The report commonly includes project information, energy calculations, proposed compliance measures, and forms that identify the building features used to demonstrate compliance. Those features may include:

Wall, ceiling, floor, and roof insulation values
Window and glazed-door performance
Window area and orientation
Roofing and cool-roof information when applicable
Heating and cooling equipment efficiency
Duct location and related mechanical details
Ventilation requirements
Domestic water-heating equipment
Residential or commercial lighting measures
Lighting-control requirements
Solar-related information when applicable to the project
Additional verification measures triggered by the design

The final report should reflect the actual plans rather than a generic building description. Product data, equipment specifications, window schedules, insulation notes, and mechanical information must be coordinated carefully because even a seemingly minor design change can affect the calculations.

For additional information about the technical evaluation, visit the Title 24 energy calculations page.

How Is a Title 24 Energy Report Prepared?

Preparing a Title 24 energy report begins with reviewing the project scope and available construction documents. AES evaluates the plans to determine which building components and systems must be included in the energy model or prescriptive compliance review.

The process generally includes the following steps:

1. Review the Project Scope

AES first determines whether the work involves new construction, an addition, an ADU, a remodel, an equipment change, a tenant improvement, or another permit-driven project. The scope establishes which energy requirements and documentation may apply.

2. Examine the Plans and Specifications

Floor plans, elevations, roof plans, sections, window schedules, insulation notes, mechanical information, water-heating specifications, and lighting plans are reviewed for relevant energy details.

3. Identify Missing or Conflicting Information

If the drawings do not identify a required insulation value, equipment efficiency, window specification, roof assembly, or another necessary feature, AES can explain what information is still needed.

4. Complete the Energy Analysis

The proposed building features are evaluated using the appropriate compliance method. The analysis determines whether the design meets the applicable requirements or whether certain features should be adjusted.

5. Prepare the Compliance Forms

The applicable forms are generated based on the project design and selected compliance measures. These forms are intended to accompany the permit drawings and support plan review.

6. Coordinate the Report With the Plan Set

The energy measures should be reflected accurately in the plans. Coordination helps reduce discrepancies between the calculations and the construction documents.

Before submitting files, review what AES will need from you.

Residential: What Is a Title 24 Energy Report?

For a residential project, a Title 24 energy report evaluates the energy-related features of a home, addition, ADU, garage conversion, remodel, or multifamily improvement. The report supports the permit application by documenting the building envelope, mechanical equipment, water-heating system, ventilation strategy, and other applicable measures.

Residential calculations may consider the size and orientation of the building, window area, window performance, insulation, roof characteristics, HVAC efficiency, duct location, and water-heating equipment. These details work together, which means one design choice may affect the performance requirements for another component.

For example, a project with extensive glazing may need stronger performance elsewhere in the design. A proposed HVAC change may also affect required forms, equipment information, or verification measures.

The purpose is not simply to generate paperwork. The report provides the project team with a defined set of energy measures that must remain coordinated through permitting, construction, and inspection.

ADUs, Additions, and Remodels

ADUs, additions, and remodels frequently require a Title 24 energy report because they create or modify conditioned space and energy-related building components.

A detached ADU may require evaluation as a separate residential structure. An attached ADU, garage conversion, or room addition may require the new work to be analyzed in relation to the existing building. A major remodel may trigger requirements when windows, walls, roofing, insulation, HVAC systems, or water-heating equipment are changed.

Early review is valuable because existing conditions can affect design decisions. AES can evaluate the proposed work and help determine which plans, schedules, and specifications are needed before the report is finalized.

Visit the ADU Title 24 page for more information about energy documentation for accessory dwelling units.

Commercial: What Is a Title 24 Energy Report?

For a commercial or nonresidential project, a Title 24 energy report documents the applicable energy requirements for the proposed scope of work. Commercial analysis may involve the building envelope, mechanical systems, ventilation, service water heating, lighting power, and lighting controls.

Projects that may require commercial energy documentation include:

Office tenant improvements
Retail build-outs
Restaurant improvements
Warehouse alterations
Mixed-use projects
Commercial HVAC replacements
Interior and exterior lighting upgrades
Multifamily common-area improvements
New nonresidential buildings

Commercial projects often involve coordination among architects, electrical designers, mechanical engineers, contractors, property managers, and tenants. The energy documentation should accurately represent the work shown by each discipline.

Lighting fixture schedules, control notes, mechanical equipment specifications, ventilation information, and envelope details may all influence compliance. Missing or inconsistent information can affect plan review and may require updated calculations.

For related professional services, review Title 24 compliance services and Title 24 energy analysis.

What Information Is Needed for a Title 24 Energy Report?

The information needed depends on the project, but a complete plan set usually allows the report to be prepared more efficiently. Helpful documents may include:

Floor plans
Exterior elevations
Building sections
Roof plans and roof-assembly details
Window and exterior-door schedules
Window manufacturer specifications when available
Wall, roof, ceiling, and floor insulation notes
HVAC equipment specifications
Duct-location information
Ventilation details
Water-heating equipment information
Commercial lighting fixture schedules
Commercial lighting-control plans
Existing plan-check correction comments

Not every client will have all of these items at the beginning. AES can review the available documents and identify which missing details are necessary to continue.

Providing clear and current information helps prevent the report from being based on outdated plans or assumptions that later require revision.

How Long Does a Title 24 Energy Report Take?

Turnaround time depends on the type of project, the size and complexity of the building, the completeness of the plans, and whether design questions must be resolved before the calculations can be completed.

A straightforward project with coordinated drawings and complete specifications can generally move more efficiently than a project with missing window data, undecided HVAC equipment, conflicting floor areas, or incomplete construction details.

Revision timing also depends on the extent of the changes. Replacing one product specification is different from redesigning the building envelope, changing the conditioned floor area, revising the mechanical system, or responding to multiple plan-check comments.

To discuss the schedule for a specific project, call Alternative Energy Systems at (626) 365-1518.

What Happens If the Plans Change After the Report Is Completed?

The Title 24 energy report may need to be revised when the plans change. Updates can be necessary when the project team changes windows, insulation, roofing, HVAC equipment, water heating, lighting, conditioned floor area, room configuration, or another feature included in the original analysis.

Submitting outdated energy forms with revised plans can create inconsistencies during plan review. The report should remain aligned with the current design, particularly when a change affects energy performance or a required compliance measure.

If the building department issues correction comments, send the complete comments along with the latest plan set. AES can review the requested changes and determine whether the calculations, forms, or plan notes need to be updated.

Does a Title 24 Energy Report Include HERS Requirements?

Some residential projects may include measures that require field testing or verification. Whether those requirements apply depends on the project scope, mechanical design, duct conditions, equipment, and compliance path.

The energy report can identify applicable verification measures, but the report itself is not a substitute for field testing or inspection. When verification is required, the project team should understand which measures must be completed and documented during construction.

This distinction is important because the consultant prepares the energy analysis and forms, while applicable field verifications are completed separately by the appropriate professional.

For a comparison of overlapping building-code topics, review Title 24 vs. CALGreen.

Can a Title 24 Energy Report Help With Plan-Check Corrections?

A Title 24 energy report can be revised when a building department requests clarification or identifies a conflict involving the energy documentation. Correction comments may concern missing forms, inconsistent specifications, incomplete plan notes, mechanical information, lighting controls, or differences between the report and the drawings.

To evaluate the correction accurately, AES should receive:

The complete building-department correction notice
The latest architectural plans
Any revised mechanical or electrical plans
Updated product and equipment specifications
A clear summary of design changes made after the original report

Addressing the full correction notice is generally more effective than reviewing an isolated comment without the surrounding project information.

Call (626) 365-1518 if your project already has plan-check corrections and the energy documents need to be reviewed.

What Is the Difference Between the Report and the Plans?

The construction plans show what will be built. The Title 24 energy report evaluates the energy-related characteristics of that design and documents the compliance measures associated with it.

The plans may show wall construction, roof assemblies, windows, doors, equipment, ductwork, lighting, and controls. The report uses those details to complete the energy analysis and generate the applicable forms.

Because the two documents serve different purposes, both must remain coordinated. A correct calculation based on outdated plans can still create a permitting problem. Likewise, a well-developed plan set may remain incomplete for submittal when the required energy documentation has not been prepared.

Why Choose Alternative Energy Systems?

Alternative Energy Systems provides experienced Title 24 support for homeowners, contractors, architects, designers, developers, property managers, and commercial clients throughout California.

AES offers more than 30 years of experience with energy-compliance documentation for residential, multifamily, mixed-use, and commercial permit projects. The service is built around reviewing the actual project, identifying the information needed for the analysis, and preparing documentation that coordinates with the current plans.

Clients choose AES for assistance with:

New residential and commercial construction
ADUs and garage conversions
Additions and remodels
Multifamily improvements
Commercial tenant improvements
HVAC and lighting projects
Plan-check corrections
Energy-report revisions

AES does not rely on generic descriptions that ignore the individual project. The report is prepared using the plans, specifications, and energy-related features associated with the proposed work.

Get Help With a Title 24 Energy Report

Call (626) 365-1518 | Alternative Energy Systems

Understanding What Is a Title 24 Energy Report is only the first step. The report must also be prepared using accurate project information, coordinated with the plans, and updated when the design changes.

Alternative Energy Systems can review your project documents, explain what information is needed, prepare the applicable energy analysis, and help move the compliance package toward permit submittal.

Call (626) 365-1518 to discuss your project, request a quote, or ask what documents should be submitted first. You may also use the contact page to send project information.

If service has already been arranged, payment can be completed through the AES payment page.

Do not let incomplete or inconsistent energy documentation create avoidable permit delays. Call Alternative Energy Systems at (626) 365-1518 for professional assistance with your Title 24 energy report.

Frequently Asked Questions: What Is a Title 24 Energy Report?

What Is a Title 24 Energy Report?

A Title 24 energy report is a project-specific energy analysis and compliance package prepared to show how a proposed building design addresses the applicable California energy-efficiency requirements.

Is a Title 24 energy report the same as a building plan?

No. The building plans show the proposed construction, while the energy report evaluates energy-related features within those plans and produces the applicable compliance documentation.

When is a Title 24 energy report required?

It may be required for new construction, ADUs, additions, garage conversions, remodels, multifamily improvements, commercial tenant improvements, HVAC work, lighting projects, and other permit scopes involving energy-related building components.

Who prepares a Title 24 energy report?

The report is prepared by an energy-compliance professional who reviews the project documents, completes the applicable analysis, and generates the required forms.

What documents should I submit?

Helpful documents include floor plans, elevations, sections, roof plans, window schedules, insulation details, HVAC specifications, water-heating information, commercial lighting plans, and existing correction comments.

Can the report be prepared before the plans are complete?

Preliminary review may begin with available documents, but the final report requires enough project information to complete the calculations accurately and coordinate the compliance measures with the plans.

Can a Title 24 energy report be revised?

Yes. A revision may be needed when the plans, windows, insulation, roofing, HVAC equipment, lighting, water heating, floor area, or other energy-related features change.

Does every project use the same report?

No. The required forms and calculations depend on the occupancy type, project scope, construction details, building systems, and selected compliance method.

Does the report guarantee permit approval?

No single document can guarantee approval. The report supports the permit application, but the complete project remains subject to review by the applicable building department.

How much does a Title 24 energy report cost?

Pricing depends on the project type, size, complexity, available documentation, turnaround requirements, and whether revisions are needed. Review Title 24 report pricing in California or call (626) 365-1518 for a project-specific quote.

How long does it take to prepare the report?

Timing depends on project complexity and whether the plans contain the information needed to complete the analysis. Call (626) 365-1518 to discuss your project schedule.

Where can I find more answers?

Review the Title 24 report frequently asked questions page or contact Alternative Energy Systems directly.

How do I get started?

Call Alternative Energy Systems at (626) 365-1518. AES can review the project scope, explain which documents are needed, and provide the next steps for preparing the report.