A client submitted a complete permit set last spring — floor plans, elevations, electrical diagrams, and structural sheets. The plan check returned in two weeks with one correction notice: the CF1R form was missing. That single omission delayed the project by three weeks and added a revision cycle nobody wanted. The CF1R form Bay Area permit reviewers require is a mandatory component of California's Title 24 energy compliance package, and it must appear in the permit set before the building department will issue approval. Our team at Yuna Drafting has assembled this guide to clarify what the CF1R form is, when it applies, and how to integrate it correctly from the start. For a broader view of what belongs in a permit set, our post on what is included in a residential permit set for Santa Clara County provides essential context.

CF1R form for Bay Area permit set on drafting desk with Title 24 energy compliance documents
Figure 1 — A signed CF1R form is a required compliance document in every Bay Area residential permit submittal.

The CF1R — formally the Certificate of Compliance for Low-Rise Residential Buildings — is the output document from a Title 24 energy analysis. It summarizes the building's proposed compliance path, envelope specifications, mechanical systems, and fenestration data. California's Building Energy Efficiency Standards, administered by the California Energy Commission, define the performance thresholds the CF1R must satisfy. Our Title 24 CF1R energy calculations service produces this document for residential projects across the Bay Area.

Most building departments in San Jose, Sunnyvale, Cupertino, and Santa Clara County will not accept a permit set without a signed CF1R attached. The form is not a summary — it is a legal compliance record. Reviewers cross-reference it against the architectural drawings. Any mismatch between the two triggers a correction notice and restarts the plan check clock.

Contents

  1. What a CF1R Form Contains — and How It Is Generated
    1. Required Data Fields
    2. Calculation Software
  2. Integrating the CF1R Form Into a Bay Area Permit Set From Day One
    1. Sequencing the Energy Analysis
    2. Coordinating With Architectural Drawings
  3. Keeping CF1R Compliance Current Through Construction
    1. When the CF1R Must Be Revised
    2. Inspection Posting Requirements
  4. How CF1R Requirements Play Out in Real Bay Area Projects
    1. Room Additions and ADUs
    2. Garage Conversions
  5. CF1R Misconceptions That Derail Bay Area Permit Sets
    1. The Contractor Will Handle It
    2. It Only Applies to New Construction
  6. Registered vs. Non-Registered CF1R Filing: Trade-offs Worth Knowing
    1. Registered Document Advantages
    2. Non-Registered Limitations
  7. Frequently Asked Questions
  8. Next Steps
Chart showing CF1R form sections mapped to corresponding Bay Area permit set documents
Figure 2 — CF1R form sections and their corresponding source documents in a typical Bay Area permit set.

What a CF1R Form Contains — and How It Is Generated

Required Data Fields

The CF1R is not a free-form narrative. It is a structured output with specific required fields. Every value must match a corresponding notation on the architectural drawings submitted alongside it.

CF1R SectionWhat It CoversSource in Permit Set
Project InformationAddress, climate zone, conditioned floor areaCover sheet and floor plan
Building EnvelopeWall, roof, and floor assembly U-factors and R-valuesWall section and details
FenestrationWindow and door U-factors, SHGC, total glazing areaWindow and door schedule
HVAC SystemsHeating and cooling equipment efficiency ratingsMechanical schedule
Water HeatingWater heater type, efficiency, and distribution systemPlumbing notes
LightingIndoor and outdoor lighting power densityElectrical plan
Solar ReadinessPV conduit and panel provisions for new constructionElectrical and roof plan

Calculation Software

California accepts a limited set of approved software for generating the CF1R. Our team uses compliance engines certified by the California Energy Commission. The most widely used tools are:

  • EnergyPro — the industry standard for residential Title 24 compliance in California
  • CBECC-Res — the state's free reference tool, used primarily for verification
  • Third-party tools certified under the Alternative Calculation Method (ACM) approval process

The software generates the CF1R PDF directly from project inputs. Our team does not manually populate CF1R fields — the calculation engine does, based on the data our drafters enter.

Integrating the CF1R Form Into a Bay Area Permit Set From Day One

Sequencing the Energy Analysis

The CF1R cannot be finalized until the architectural drawings are near-complete. The energy model depends on wall assemblies, window schedules, conditioned floor area, and mechanical equipment selections — all of which must be confirmed before the form is produced. Our recommended sequence:

  1. Complete schematic floor plans and building sections
  2. Finalize wall assemblies and insulation specifications
  3. Establish the window and door schedule with U-factor and SHGC values
  4. Confirm HVAC and water heating equipment selections
  5. Run the Title 24 energy model and generate the CF1R
  6. Cross-check every CF1R value against all permit set sheets
  7. Attach the signed CF1R to the permit submittal package

Starting the model too early means rework when design decisions change. Starting at submittal means the CF1R holds up the package. Our team initiates the model at design development, refining it as final specifications are confirmed.

Coordinating With Architectural Drawings

Mismatches between the CF1R and the permit drawings are the most frequent source of Title 24 correction notices. Our team aligns the following points on every project before submittal:

  • Climate zone on CF1R must match the jurisdiction noted on the cover sheet
  • Conditioned floor area on CF1R must match the floor plan callout
  • Window U-factor and SHGC must match the window schedule exactly
  • HVAC equipment efficiency must match the mechanical notes
  • Water heater specifications on CF1R must match the plumbing notes

Keeping CF1R Compliance Current Through Construction

When the CF1R Must Be Revised

Design changes after permit issuance can invalidate the CF1R. Any modification to the building envelope, HVAC system, or fenestration requires a revised CF1R before the affected inspection can proceed. Common triggers:

  • Substituting a window product with a different U-factor or SHGC rating
  • Switching to HVAC equipment with a lower efficiency rating
  • Adding or removing conditioned floor area during construction
  • Revising wall or roof insulation to a different R-value assembly
  • Converting unconditioned space to conditioned space mid-project

Inspection Posting Requirements

The CF1R travels with two companion forms through construction. The CF2R (Installation Certificate) confirms that energy features were installed as specified. The CF3R (Verification Certificate) confirms that HERS-rated measures were verified by a certified rater. All three — CF1R, CF2R, and CF3R — must be on-site and available to the inspector at the relevant inspection stages. Missing any one of the three can halt an inspection outright.

How CF1R Requirements Play Out in Real Bay Area Projects

Room Additions and ADUs

Our team processes CF1R forms for room additions and ADUs across San Jose, Cupertino, Sunnyvale, and surrounding cities every week. The scope of the CF1R depends on project type:

  • Room additions under 1,000 sq ft: prescriptive compliance path is generally available; CF1R addresses the addition only
  • Additions over 1,000 sq ft or new ADUs: performance compliance path often required; CF1R models the entire conditioned structure
  • Attached ADUs: the energy model must address the thermal boundary between the ADU and the primary dwelling

Omitting the CF1R from an ADU or addition submittal is one of the leading causes of plan check rejections across the Bay Area. Our post on common reasons Bay Area permit sets get rejected at plan check documents the full correction pattern — missing or mismatched CF1R data ranks near the top of that list.

Garage Conversions

Garage-to-living-space conversions are a frequent CF1R scenario in Santa Clara County. Converting a garage introduces new conditioned floor area and adds HVAC load. The CF1R must model the converted space as conditioned, and insulation values in the converted walls, ceiling, and slab must meet Title 24 minimums — and appear on the CF1R. Our team sees correction notices on garage conversion submittals most often when the CF1R still reflects the original unconditioned garage rather than the converted space.

CF1R Misconceptions That Derail Bay Area Permit Sets

The Contractor Will Handle It

This assumption causes more delays than any other we encounter. Contractors are responsible for the CF2R installation certificate — not the CF1R. The CF1R is a design-phase compliance document. It must be produced before permit submittal, not during or after construction. Relying on the contractor to raise the CF1R issue is waiting until it is too late to avoid a correction notice.

It Only Applies to New Construction

This misconception is widespread. The CF1R applies to a broad range of project types:

  • New single-family homes and multifamily buildings up to three stories
  • Room additions and attached ADUs
  • Garage and accessory structure conversions to conditioned space
  • Alterations that modify the building envelope, HVAC system, or water heating
  • Second-story additions that increase conditioned floor area

In our experience, most permit sets for additions above 500 square feet will require a CF1R. Assuming otherwise leads to correction notices and revision fees that are entirely avoidable.

Registered vs. Non-Registered CF1R Filing: Trade-offs Worth Knowing

Registered Document Advantages

California allows CF1R forms to be registered through the HERS Provider Registry. Registered CF1R documents carry more weight with building officials and are required for compliance pathways that include HERS-verified measures. Key advantages:

  • Unique registration number that plan reviewers can verify through the registry portal
  • Reduced scrutiny during plan review in most Bay Area jurisdictions
  • Required for projects using performance compliance with HERS measures such as duct leakage testing or refrigerant charge verification

Non-Registered Limitations

Non-registered CF1R forms are acceptable for projects using the prescriptive compliance path without HERS measures. Limitations include:

  • No online verification option available to plan reviewers
  • Some Bay Area jurisdictions request supplemental documentation when the CF1R lacks a registration number
  • Not acceptable when the compliance pathway includes mandatory HERS verification items

Our team recommends registered CF1R filing as the default for every Bay Area project. The added cost is minimal. The reduction in plan check friction is consistent and measurable across our project history.

Infographic showing CF1R form workflow from design through permit approval in Bay Area
Figure 3 — CF1R workflow from energy model initiation through permit approval and construction inspection.

Frequently Asked Questions

The CF1R is the Certificate of Compliance confirming that a residential project meets California's Title 24 energy efficiency standards. It is required for new construction, room additions, ADUs, garage conversions, and most alterations that affect the building envelope, HVAC systems, or water heating — not only for new homes.

A Title 24 energy consultant or qualified drafter prepares the CF1R using CEC-approved compliance software. This is a design-phase responsibility — not the contractor's. Our team at Yuna Drafting produces CF1R forms as part of every residential permit set we compile.

The model should begin at design development, once wall assemblies, window specifications, and HVAC selections are substantially confirmed. Starting earlier leads to rework when design decisions change. Starting at permit submission delays the submittal and invites rushed errors.

Registration is mandatory for compliance pathways that include HERS-verified measures such as duct leakage testing or refrigerant charge verification. For prescriptive paths without HERS items, non-registered forms are technically acceptable. Our team recommends registered filing as the default for all Bay Area submittals.

Mismatches between CF1R values and the architectural drawings are the primary cause. The most frequent discrepancies involve window U-factors, conditioned floor area totals, and HVAC equipment efficiency ratings. Rigorous cross-checking before submittal eliminates most of these correction notices.

Next Steps

  1. Confirm the project scope with an energy consultant to determine whether prescriptive or performance compliance applies before design development concludes.
  2. Finalize wall assemblies, the window and door schedule, and HVAC equipment selections before initiating the Title 24 energy model.
  3. Request registered CF1R filing through a HERS provider — this is the standard our team applies to every Bay Area submittal.
  4. Cross-check every CF1R value against the permit drawings before the submittal package is assembled and delivered to the building department.
  5. Contact our team at Yuna Drafting to bundle the CF1R with the full permit set for a coordinated, single-source submittal.