ADU Cost Calculator
Estimate accessory dwelling unit cost for garage conversion, detached build, or basement conversion.
Estimated Cost
$120,000.00-$210,000.00
Cost per Sqft
$200-$350
Annual ROI
10.9%
Project Details
| Construction cost | $165,000.00 |
| Permit estimate (5%) | $8,250.00 |
| Total project | $173,250.00 |
| Timeline | 6-12 months |
| Annual rental income | $18,000.00 |
Use the ADU Cost Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
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