Is the checker result a compliance determination?

No. It points to a likely document family to discuss. Project classification, permit application date and your building department decide.

Why does multifamily say "confirm classification"?

Multifamily buildings can fall under different form families depending on stories, unit count and code cycle. Occupancy alone does not settle it.

Do plan-check comments mean the original report was wrong?

Not necessarily. Comments often follow design changes or missing inputs. Corrections are free only when they trace to an error in documents we prepared.

What about CF2R and CF3R?

Where single-family forms apply, CF2R is installation certification and CF3R is ECC verification. Both are separate from design-phase CF1R preparation.

Which Title 24 Forms Do I Need? 60-second Checker

At a glance

Typical starting points by project type

Project	Likely family	Inputs to send
Single-family, new or ADU	CF1R family is the usual starting point	Floor plans, elevations, window schedule, HVAC and water heating
Single-family addition or alteration	CF1R, often limited to altered or added scope	Existing vs proposed plans and component details
Multifamily	Confirm classification before assuming a family	Stories, unit count, common areas, full plan set
Commercial new or tenant improvement	NRCC family, by component (envelope, mechanical, lighting)	Lighting plan, mechanical schedules, envelope details

Multifamily: classification comes first

A building with several dwelling units is not automatically one form family. Stories, unit count, common areas and the code cycle for your permit application date shape the answer. Confirm with your designer or building department.

City sent comments? Triage the cause

Plan-check comments do not automatically mean a report error. Pick the path that matches what happened.

Comment traces to our documentsWe review it; errors in our work are corrected at no charge.
The design changedArchitectural revisions to an existing report.
Full model rebuild / major redesignCustom quote after intake, not the architectural-revision flat fee.

Questions

Is the checker result a compliance determination?: No. It points to a likely document family to discuss. Project classification, permit application date and your building department decide.
Why does multifamily say "confirm classification"?: Multifamily buildings can fall under different form families depending on stories, unit count and code cycle. Occupancy alone does not settle it.
Do plan-check comments mean the original report was wrong?: Not necessarily. Comments often follow design changes or missing inputs. Corrections are free only when they trace to an error in documents we prepared.
What about CF2R and CF3R?: Where single-family forms apply, CF2R is installation certification and CF3R is ECC verification. Both are separate from design-phase CF1R preparation.

What to send with the likely form family

Send the floor plans, elevations, conditioned area and unit count, window/door schedule, and available HVAC and water-heating details. Commercial scopes may also need lighting plans, fixture schedules and controls information. For plan-check recovery, include the comment letter and the current energy documents, not just a description of the problem.

Use the AHJ-recorded permit application date to confirm the code cycle. Current guidance is the 2025 Energy Code; required residential field verification uses ECC terminology. HERS is legacy language for older-cycle records. We prepare design-phase documentation, not ECC field verification or nonresidential acceptance testing.

Detailed intake checklist

Official sources

The CEC separates forms by edition and building category. Select the current forms catalog after confirming the project classification with your reviewer; this checker does not assign a specific certificate suffix or guarantee permit acceptance.

CEC Energy Code Support Center Upload plans to confirm the documentation scope