Free ADU cost estimator
What will an ADU cost on your property?
An all-in California price range, including design, permits and utilities. Then book a free review to see what fits on your lot.
Step 1 · Your ADU
Bedrooms
S = studio
Finish level
Estimated all-in cost
$293,000
to $435,000
- Typical timeline
- 9-14 months
- Cost per sq ft (all-in)
- $419-$621
- State impact-fee waiver
- Likely (under 750 sq ft)
Planning range for California projects, including design, engineering, permits, utility connections and construction. Not a quote. Your lot, utilities, city fees and finishes set the real number.
Step 2 · Free feasibility review
Can you build it on your lot?
Share your ZIP code and we will check zoning, setbacks, utilities and access, then walk you through a buildable layout and a firm next step. On Zoom or at your home.
- ✓ Zoning and setback check
- ✓ Sewer, water and electrical capacity review
- ✓ Layout options for your lot
- ✓ Optional solar + battery for the new unit