Estimate what it costs to build an accessory dwelling unit in your state — itemized like a contractor's bid.
Most states cap ADUs between 800–1,200 sq ft. Studios start around 300.
Free · No obligation · Licensed contractors in your area
Estimates reflect 2026 national cost data adjusted by state labor and permit indexes. Actual bids vary with lot conditions, utility distances, and city-specific fees — treat this as a planning range and confirm with local licensed contractors. See our city guides for permit rules and fees where you live.