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.
- Frequently Asked Questions (FAQs)
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Fact Sheets
- 2022 Accessory Dwelling Units FAQs
- Single-family Building Accessory Dwelling Units 2022 (Energy Code Ace document)
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