Instant ADU Cost Calculator
See What Your
ADU Could Cost
Answer a few quick questions to receive a preliminary low-to-high price range based on your project type, size, layout, foundation, utilities and finish level.
Location
Project Type
Size & Layout
Foundation
Finishes
This calculator provides an early planning estimate only. It is not a construction proposal, guaranteed price, permit determination, financing offer, or contract.
Sample Estimate
Live Preview
$140K–$220K
600 SF Detached ADU · Standard Finishes
Basic Building$117K – $141K
Additional Costs$23K – $79K
Effective Rate$233 – $367/SF
$220/SF$350/SF
4–8 mo
Timeline
Standard
Complexity
600 SF
Size