The ADU Revolution
Granny flats, backyard cottages, in-law units. Whatever you call them, state governments are forcing cities to legalize them.
California's Case Study
In 2016, California produced roughly 1,200 ADUs. By 2022, following aggressive state preemption of local zoning bans, that number jumped to nearly 25,000 permitted units annually.
Attached: Shares a wall with the primary residence. Max size typically 50% of primary.
Detached: A standalone structure. Max size typically 800-1,200 sq ft depending on state law.