Look up your city's exact accessory dwelling unit size limits, setbacks, and permit rules - then tell us about your project and get matched with vetted local builders, free.
Whether you're planning your first ADU or looking for your next job, ADU Regulations connects the right people.
Thinking about adding an ADU to your property? Look up the exact size limits, setbacks, and permit rules for your city, then tell us about your project - we'll connect you with vetted local builders ready to bring it to life.
Grow your pipeline with homeowners actively planning ADU projects in your area. We alert you the moment a new project matches your service area - get matched with homeowners looking for a builder like you.
Every city writes its own playbook - some make it easy, others require a discretionary permit. Here's a look at two of the country's most active ADU markets; browse all 101 below.
Washington's statewide ADU law plus Seattle's own 2025 zoning update make it the highest-scoring city on the whole site - up to 2 ADUs per lot, no owner-occupancy, no parking mandate.
The single largest ADU market in the country - over 6,600 ADUs permitted in 2024 alone, under California's statewide by-right law layered with LA's own ordinance.
*Figures are summarized for convenience and may vary by lot and unit type - always confirm current requirements with the city before designing or applying. Full citations are on each city's rules page.
Answer a few quick questions about your property, your city, and the kind of ADU you're picturing.
Your project is shared with contractors serving your area the moment you submit it - no waiting around.
The first three contractors to respond reach out directly so you can compare quotes and timelines.
