§ ADU CalculatorADU Calculator

Know your numbers in 60 seconds.

Enter your property details. We analyse against California ADU law + local jurisdiction rules and return sizing, costs, and timelines.

Estimates based on CA state ADU law. Local jurisdiction may vary. Not a binding quote.

Your estimateLive
All-in cost
$395.6k
Max allowed size1152 sqft
Recommended unit920 sqft
Timeline13 wks
Est. monthly rent$3,864/mo
Feasibility920/1152 sqft