CF1R vs CF2R vs CF3R: Understanding California Energy Compliance Forms

A permit technician at a Bay Area building department once flagged a complete Title 24 package as non-compliant — not because the energy calculations were wrong, but because the applicant had submitted only the CF1R without the required CF2R forms. That oversight added three weeks to the permit timeline. Understanding the CF1R CF2R CF3R difference prevents exactly this kind of avoidable delay. These three California Energy Compliance forms are not interchangeable — each captures a distinct phase of the compliance lifecycle, from design intent through contractor installation and independent field verification. Sunny Drafting & Design prepares complete Title 24 CF1R energy calculations for Bay Area residential and commercial projects, coordinating all three form types within a single permit package.

California's Title 24, Part 6 — the Building Energy Efficiency Standards — mandates a documentation chain that runs from the designer's desk to the field inspector's clipboard. The CF1R, CF2R, and CF3R forms are the primary vehicles for that chain. Each form targets a different stakeholder: the energy consultant, the licensed contractor, and the certified field verifier. Submitting the wrong form, the wrong version, or an incomplete set is among the most reliable ways to generate plan check corrections.

The California Energy Commission (energy.ca.gov) publishes and updates all compliance forms with each standards cycle. The 2022 Building Energy Efficiency Standards, which govern most new construction and major alterations, introduced revised versions of all three form families. Getting those versions right — and populating them correctly — is a baseline competency for any firm handling California permit submittals.

The CF1R CF2R CF3R Difference: A Practitioner's Overview

The three CF forms map directly to three project phases: design, construction, and inspection. They are sequential by design — CF1R feeds into CF2R, and CF2R sets the scope for CF3R. Missing or misordering them signals to plan checkers that the applicant does not understand the compliance workflow.

What the CF1R Covers

The CF1R (Certificate of Compliance) is the design-phase document. It contains:

• Building envelope specifications — insulation R-values, fenestration U-factors and SHGC
• HVAC system design parameters and equipment efficiency ratings
• Water heating system compliance data
• Lighting power density for conditioned spaces
• All HERS measures the project is required to meet
• Mandatory measures applicable to the project type and climate zone

The CF1R is prepared by the Title 24 energy consultant and submitted with the permit application. Every permit set for conditioned space requires one. The plan checker reviews it to determine whether the proposed design meets the 2022 standards before issuing the permit.

What the CF2R Covers

The CF2R (Installation Certificate) is the contractor-phase document. Once construction begins, each licensed contractor installs systems and then documents what was actually installed. Key contents include:

• Installed insulation type, R-value, and coverage area
• HVAC equipment model numbers and certified efficiency ratings
• Duct leakage test results (pre-verification)
• Window and door NFRC label verification
• Water heater installation data

Multiple CF2R sub-forms exist — CF2R-ENV for envelope, CF2R-MCH for mechanical, CF2R-PLB for plumbing, CF2R-LTG for lighting. Each must be signed by the responsible contractor and kept on-site through final inspection.

What the CF3R Covers

The CF3R (Inspection Certificate) is the field-verification document. A HERS (Home Energy Rating System) rater completes it after conducting diagnostic testing. Required verifications include:

• Duct leakage testing — target ≤4% of system airflow for new construction
• Verified refrigerant charge (QII protocol)
• Airflow measurement through supply registers
• Insulation installation quality inspection
• Indoor air quality ventilation system verification

The CF3R closes the compliance loop. Without it, final inspection approval is withheld — meaning no certificate of occupancy is issued.

Where Each Form Fits in a Permit Submission

The timing of each form within the permit lifecycle is fixed. Understanding which form belongs at which phase eliminates the late-stage scrambles that delay final inspection.

New Construction Projects

For new residential or commercial construction, the full three-form sequence applies:

1. Permit application phase: CF1R submitted with architectural drawings and structural calculations
2. Rough inspection phase: CF2R sub-forms completed by each installing trade as work is finished
3. Final inspection phase: CF3R completed by HERS rater, uploaded to the CHEERS or CalCERTS registry before the inspector arrives

The role of Title 24 energy calculations within a complete permit set — including how they interact with structural documents — is covered in detail at The Role of Title 24 Energy Calculations in a California Permit Set, a useful reference for applicants assembling their first submission.

Alterations and Additions

Alteration projects trigger a subset of CF form requirements depending on scope. The table below summarizes the most common alteration types:

The pattern holds across project types: CF1R is required for virtually any permitted work affecting energy systems. CF3R is triggered by HVAC diagnostics — not by envelope work alone.

Managing Amendments, Revisions, and Standards Updates

CF forms are not static documents. They require active management across a project's lifecycle — and across the periodic updates to the Title 24 standards themselves.

CF Form Version Control

Each standards cycle produces new form versions. The 2022 standards replaced the 2019 form set, and plan check departments enforce the version cutoff strictly. Submitting a 2019-era CF1R under a permit application governed by the 2022 standards is an automatic correction notice.

Pro tip: Download CF forms at the start of every new project and verify the version number printed in the footer — never reuse a saved copy from a prior project without confirming it matches the current compliance year.

• Permit applications submitted after a new standards cycle's compliance date must use that cycle's forms
• HERS Provider registries (CHEERS, CalCERTS) also enforce form versions when uploading CF3R data
• Some Bay Area jurisdictions require an additional local supplement alongside the state CF1R — confirm with the AHJ before submission

Mid-Project Scope Changes

When scope changes after a permit is issued, the CF1R may require amendment. Common triggers:

• HVAC equipment substitution to a different model or efficiency rating
• Window specifications altered during construction
• Insulation type changed due to material availability
• Addition of solar PV or battery storage not included in the original design

An amended CF1R must be approved by the building department before the contractor completes the CF2R for the affected system. Out-of-sequence amendments — where the CF2R reflects a product not listed on the approved CF1R — are a recurring source of final inspection holds that require a full plan check resubmittal to resolve.

Common Errors vs. Expert-Level Execution

The CF1R CF2R CF3R difference is conceptually simple, but execution errors are widespread — particularly among teams that treat energy compliance as an afterthought rather than a parallel workflow running alongside design and structural coordination.

Novice Submission Mistakes

• Submitting CF1R only and assuming CF2R and CF3R are the contractor's problem — plan checkers flag incomplete packages before issuing permits
• Reusing a prior project's CF1R as a template without updating building orientation, window schedules, or equipment data
• Omitting HERS measures from the CF1R when compliance is achieved via performance trade-offs — leaving contractors without CF2R guidance and HERS raters without CF3R scope
• Confusing CF2R sub-form codes — submitting only CF2R-MCH when CF2R-ENV is also required for the same project
• Failing to upload the CF3R to the HERS registry before scheduling the final inspection appointment

How Experienced Teams Handle CF Forms

Experienced energy consultants and permit expediters treat the three forms as a coordinated package from day one:

1. The CF1R identifies all HERS measures at design phase — so contractors know which CF2R sub-forms apply before breaking ground
2. A pre-construction meeting assigns each CF2R sub-form to the responsible trade in writing
3. The HERS rater is engaged early and given a copy of the approved CF1R to scope the CF3R testing protocol
4. CF2R sub-forms are collected from each trade at rough inspection — not scrambled together at final
5. CF3R data is uploaded to the registry the same day field testing is complete

When Each Form Is Required — and When It Is Not

Not every project triggers all three forms. Scope, occupancy type, and whether conditioned space is involved are the primary determinants.

Project Types With Partial Exemptions

• Unconditioned accessory structures — garages, uninsulated workshops — are generally exempt from CF1R; no HVAC means no CF2R-MCH or CF3R
• Like-for-like equipment replacements of non-HERS-required systems require CF2R but typically not CF3R
• Commercial tenant improvements with no envelope modifications may require CF1R-NRB but not full HERS verification
• Cosmetic remodels involving only flooring, cabinets, or finishes require no CF forms at all

Scope Triggers That Activate CF2R and CF3R

The CF3R is triggered whenever the CF1R specifies a HERS measure. Common HERS measures appearing on residential CF1Rs include:

• Duct sealing and duct leakage testing
• Verified refrigerant charge (Quality Installation)
• Verified airflow through supply registers
• High-efficacy lighting in kitchens and bathrooms
• Indoor air quality ventilation (ASHRAE 62.2 compliance)

If any HERS measure appears on the CF1R, the CF3R is mandatory — no exceptions. The HERS rater's independent field verification cannot be substituted with contractor certification or owner declarations, regardless of how straightforward the installation appears.

Long-Term Title 24 Strategy for Bay Area Projects

For firms handling multiple permits per year — ADU builders, addition contractors, commercial TI specialists — treating CF compliance as a one-off exercise per project leaves significant efficiency on the table.

Repeat Permit Projects and Templates

Projects with recurring scopes benefit from CF1R frameworks that can be adapted quickly rather than rebuilt from scratch:

• ADU projects in the same climate zone share base envelope and HVAC assumptions — a reusable CF1R template reduces preparation time on every subsequent project
• Landlord HVAC replacement programs standardized on a single equipment model yield a repeatable CF1R-ALT and CF2R-MCH pair that moves through plan check reliably
• Commercial TI projects within the same building share base building data already documented in prior CF1R submissions

For ADU applicants specifically, the relationship between structural engineering, Title 24 compliance, and full permit coordination is detailed at How ADU Projects in the Bay Area Require Both Structural Engineering and Title 24 Energy Compliance — a resource that addresses the complete document stack required for ADU permits.

Coordinating with Contractors and Inspectors

The CF form workflow only succeeds when all parties — designer, contractor, HERS rater, building inspector — understand their responsibilities before the permit is issued. A coordination checklist for project kickoff:

• Confirm which CF2R sub-forms apply and assign each to a responsible contractor license number in writing
• Share the approved CF1R with the HERS rater before construction starts — not after drywall is closed
• Establish which HERS registry (CHEERS, CalCERTS) will receive the CF3R data upload
• Schedule HERS field visits around rough inspection, not after the building envelope is sealed
• Confirm the building inspector's protocol for accepting CF3R verification — registry printout, direct lookup, or both

Most final inspection delays tied to Title 24 compliance trace back to a coordination failure in the first week of a project — not to a technical deficiency discovered months later at the end.

Frequently Asked Questions

Next Steps

1. Confirm which CF form version applies to the current project by verifying the footer version number against the California Energy Commission's published compliance form library for the applicable standards cycle.
2. Identify all HERS measures listed on the CF1R before the permit is issued — then assign each corresponding CF2R sub-form to the responsible licensed contractor in writing at project kickoff.
3. Engage a certified HERS rater before construction begins and share the approved CF1R so the field testing scope is defined in advance, not assembled at final inspection.
4. For room additions, ADUs, HVAC replacements, or any project involving conditioned space, contact Sunny Drafting & Design's Title 24 CF1R team to prepare a compliant package that coordinates all three forms from design through field verification.
5. Review the final permit set to confirm that CF compliance documents are properly indexed, labeled, and filed within the plan set — plan checkers across Bay Area jurisdictions reject packages where CF forms are misfiled or submitted without the required signature blocks completed.