ROI calculator
What does an ADU pay you back?
Drop in the numbers, get an honest range. Build cost, rent comp, opex, financing, cap rate — no spin.
- Honest math
- Sliders update instantly
- No email needed
$300,000
$1,800
15%
6%
20%
7.5%
30 years
Monthly net rent
$1,530
Monthly mortgage
$1,678
Monthly cash flow
$-148
Estimated value
$306,000
Down payment
$60,000
Cash-on-cash return
-3.0%
Honest math, not selling-the-dream. Real numbers depend on your ZIP, financing, and operating decisions. Confirm with a CPA before signing anything.
Want the version with your real lot?
We'll plug in actual rent comp, permit timing for your jurisdiction, and three financing paths — usually in under 24 hours.
Get the real numbers