How big can an ADU be?

An ADU with less than 2 bedrooms can be up to 850 square feet and with 2 bedrooms can be up to 1,000 square feet. An attached ADU is limited to 50% of the primary dwelling floor area. A JADU can be up to 500 square feet and needs to be built within the framework of a single family detached primary dwelling.

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1. Where are ADUs allowed?
2. Can a portion of an existing house, garage or other accessory structure be converted to an ADU?
3. What is the minimum lot size required for an ADU?
4. Can an ADU be constructed above or attached to a garage?
5. How big can an ADU be?
6. How many ADUs can I build on my property?
7. Can I add a “tiny home” as an ADU?
8. What if my HOA does not allow an ADU?