ROI Calculator

Use the calculator below to explore a simple projection based on your expected rent, selected ADU model, and estimated investment. In just a few steps, you can see how an ADU could contribute to your monthly income and long-term property value.

Your Investment

ADU Model

Custom Size (Square Feet)

600 sq ft — $270,000

300 sq ft ($135K) 900 sq ft ($405K)

Site Preparation Estimate

$25,000

$10,000 $50,000

Payment Method

Down Payment %

Interest Rate %

Loan Term (years)

Rental Income

Expected Monthly Rent

$2,500/mo

$1,500 $4,000

Est. Property Tax Increase (monthly)

$150/mo

$0 $500

Your Returns

Total Project Cost

$232,900

Monthly Payment

$1,181

Monthly Cash Flow

$1,169

$14,028/year

Cash-on-Cash Return
33.2%
Annual ROI on your investment

Payback Period

3.0 yrs

Time to recover investment

10-Year Total Return
$203,427
Cash flow + appreciation

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Disclaimer: This calculator provides estimates for educational purposes only. Actual costs, rental income, and returns may vary based on location, market conditions, site requirements, and financing terms. Consult with a financial advisor before making investment decisions.