How Long Does a Multi-Family Title 24 Report Take?

Unit types, not square footage

A twenty-unit building with three repeated floor plans is a faster job than an eight-unit building where every layout differs. Each distinct plan has to be modelled on its own, with its own envelope exposures and its own glazing, so the count of unique types is the honest predictor of how long a multi-family report takes.

Supplying a unit matrix — which plan type sits at which position, and how many of each — removes the slowest part of the job, which is working that out from the drawings.

Orientation and position

The same floor plan behaves differently as a corner unit, a middle unit, a ground-floor unit and a top-floor one, because the number of exposed walls and the roof or floor condition change. Those variants have to be handled, and the drawings need to make clear which units are which.

Common areas and central systems

Corridors, lobbies, laundries and any centrally served plant are part of the picture and are often the last information to arrive. Where a building has central space conditioning or central water heating, that scope has to be defined before the model can be completed.

The dependency that sits outside the report

Where the work needs field verification, who does it depends on the building's height. In buildings of three habitable stories or fewer, an ECC-Rater tests the work and the certificates are registered. In buildings of four or more stories, duct sealing in the dwelling units is certified by the installer instead: the code waives the rater and the registry for those units (Exception 4 to Section 180.2(b)2Aiii). Either way the testing happens on site, near the end of construction, and it is the step most likely to hold up a sign-off. It does not slow the report, but it is much cheaper to plan for at design stage than to discover at inspection.

Common Title 24 Questions

1. Do apartments need Title 24?
2. Does a duplex need Title 24?
3. Do triplexes and fourplexes need Title 24?
4. Which Title 24 forms does a multi-family project use?
5. What is an LMCC certificate?
6. How much does a multi-family Title 24 report cost?

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5. Do Triplexes and Fourplexes Need Title 24?

View all Multi-Family guides → · Permits and Compliance · Title 24 guide