Find the exact size limits, setbacks, permit costs, and regulations for building an ADU in your city. 50 cities across 14 states — updated as laws change.
Max size: 1,200 sq ft · Setbacks: 4 ft for units ≤16 ft height
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft minimum
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 4 ft
View full ADU rules →Max size: 750 sq ft · Setbacks: 25 feet
View full ADU rules →Max size: 800 sq ft · Setbacks: 20 feet
View full ADU rules →Max size: 900 sq ft · Setbacks: 15 feet
View full ADU rules →Max size: 800 sq ft · Setbacks: 20 feet
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 5 feet
View full ADU rules →Max size: 1,100 sq ft · Setbacks: 10 feet
View full ADU rules →Max size: 1,050 sq ft · Setbacks: 12 feet
View full ADU rules →Max size: 1,000 sq ft · Setbacks: 10 feet
View full ADU rules →Max size: 750 sq ft · Setbacks: 10 feet
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 15 feet
View full ADU rules →Max size: 900 sq ft · Setbacks: 15 feet
View full ADU rules →Max size: 800 sq ft · Setbacks: 20 feet
View full ADU rules →Max size: 1,000 sq ft · Setbacks: 15 feet
View full ADU rules →Max size: 1,200 sq ft · Setbacks: 5 feet
View full ADU rules →Max size: 1,100 sq ft · Setbacks: 10 feet
View full ADU rules →Max size: 1,000 sq ft · Setbacks: 15 feet
View full ADU rules →Max size: 1,050 sq ft · Setbacks: 10 feet
View full ADU rules →Accessory Dwelling Units are one of the smartest investments homeowners can make.
Earn $1,000-$4,000+ per month in rental income depending on your market. Many homeowners cover their entire mortgage payment with ADU rent.
ADUs typically increase property value by $100,000-$300,000 — often more than the construction cost. A smart investment that pays for itself.
House aging parents, adult children, or guests. Use it as a home office. The flexibility of an ADU adapts to your life as it changes.
Get free quotes from pre-vetted ADU contractors in your area. Compare prices, timelines, and reviews.
Get Free Quotes →Complete beginner's guide to Accessory Dwelling Units — types, benefits, costs, and regulations explained.
Read the guide →HELOCs, construction loans, cash-out refi, and ADU-specific lenders. Find the best way to fund your project.
Explore options →Estimate your total ADU cost including construction, permits, design, and utilities by city and type.
Calculate costs →Detached, attached, garage conversion, basement, JADU, or prefab — learn which ADU type is right for you.
Compare types →Navigate the permitting process step by step — applications, timelines, inspections, and common pitfalls.
Read guide →Factory-built ADUs can save 20-40% and cut timelines in half. Compare top manufacturers and models.
Explore prefab →