Plan with the numbers in view
Make room in your budget.
Explore a planning range, adjust the assumptions, and save an option to discuss with a partner.
Loading estimator…
Typical Utah ADU planning ranges
Project budget excluding land: Signature finishes, $10,000 design/permit allowance, $14,000 site allowance for detached builds, and $4,500 utility discovery contingency. Model reviewed September 24, 2026; assumptions, not bids.
| ADU type | Size | Planning range |
|---|---|---|
| Basement / internal suite | 700 sq ft | $85,000 – $125,000 |
| Garage conversion | 450 sq ft | $70,000 – $105,000 |
| Detached backyard ADU | 600 sq ft | $120,000 – $170,000 |
| Larger detached ADU | 900 sq ft | $170,000 – $240,000 |