When the California Energy Commission (CEC) first created Title 24 Building Energy Efficiency Standards in 1977, the focus was on single family homes. At the time, multifamily dwellings represented about a third of new residential units. Since that time, efficiency standards developed primarily for single-family homes have been applied to low-rise multifamily residential units. Likewise, nonresidential building equipment and envelope characteristics have been applied to high-rise multifamily buildings. Throughout the 1990s, building codes focused on multifamily housing never emerged due to a decline in multifamily new construction from 1985 to 1993 and little growth for the following ten years. Likewise, the first utility-sponsored multifamily new construction program was not launched until 1999, two decades after single-family new construction programs. From then until now, interest in multifamily-specific standards has greatly increased. In early 2018, the CEC made a public commitment to appropriately address multifamily in the 2022 Standards.
Original publication date: January 4, 2019
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The Statewide CASE Team values input from all stakeholders engaged in the Title 24, Part 6 code change process. We encourage the open exchange of code change comments and concerns.