Does the tentative map date fix the code edition?

We found no such rule in Part 6. A permit is judged on the code in effect when it is applied for, and the building department sets that date. Ask your department before relying on an earlier date.

Can identical homes share one set of ECC tests?

At the builder's option, through group sampling. The rater tests the first home of each model, and groups are limited to seven closed or five open homes in one subdivision.

Does a changed subcontractor affect sampling?

Yes. When a subcontractor responsible for a verified feature changes, the builder notifies the rater and sampling ends for the affected groups.

Title 24 for Developers

A developer meets the Energy Code at scale, where one decision repeats across every lot or unit.

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Permit-ready report by email

The questions that cost a development time are about dates, sampling and classification, not individual measures. We prepare the certificates for each plan; this page covers what you decide across the project.

Dates and classification

The permit date, per permit

A department may not issue a permit unless the construction is designed to comply with the Part 6 in effect when that permit was applied for, and an expired, unbuilt permit is judged again on its new date (Section 10-103(d)1). A building permit includes electrical, plumbing and mechanical permits. The application date is set by the building department. The only tentative-map wording in Part 6 is in the solar-ready rule, and we found no vesting or phased-permit clause.

Solar-ready beyond ten lots

For multifamily, hotel and motel and nonresidential buildings within the story limits of Section 110.10(a), the solar zone is at least 15 per cent of the roof, may sit on another structure within 250 feet or on covered parking, and covers the entire building including mixed occupancy (Section 110.10(b)1B).

Mixed use

The multifamily sections cover dwelling units and common use areas; nonresidential spaces follow the nonresidential sections. One occupancy of at least 80 per cent of floor area may set envelope, HVAC and water heating, but lighting and mandatory measures are checked space by space.

Testing a production run

Sampling is your option

The ECC-Rater fully tests the first home of each model. Closed groups hold seven homes and open groups five, an open group may stay open six months, and homes in a group share one jurisdiction and subdivision. Changing a subcontractor ends sampling for the affected groups.

Do not fix the sampled home

Corrections made to a home after the rater selects it, to avoid reporting a failure, put 100 per cent of the group under test (RA2.6.4.3). Weigh-in refrigerant charges and alterations cannot be sampled.

Multifamily certificates

One CF1R may cover a multifamily building, but each unit needs its own CF2R and CF3R.

Relief and ordering

When a design is far along

The Commission may exempt a building from a provision where substantial funds were spent in good faith on design before its adoption and compliance would need both substantial delay and cost (Section 10-108).

How to order

Residential reports start at $245 and multi-family at $345; commercial work is quoted. Send plans as PDFs with addresses and lot plans. Revisions are unlimited.

Repeat plans are covered by Title 24 for builders and reusing a report. See solar ready, preparing for the ECC-Rater, mixed-use buildings, shell buildings and multi-family reports.