Accessory dwelling units (ADUs) are secondary dwellings on residential lots. Sometimes called “granny flats” or “in-law suites," they can be used to house family and visitors, or as rental properties. ADUs, like all other residential structures in California, are subject to the Energy Code.
Presentations
Fact Sheets
- 2022 Accessory Dwelling Units FAQs
- Single-family Building Accessory Dwelling Units 2022 (Energy Code Ace document)
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