What this calculator does

See how a legal basement suite could pay back from the monthly rent, the vacancy, the running costs and the project cost. The numbers in the calculator are examples. Replace them with yours.

How to use it

1. Enter the monthly rent you expect.
2. Enter the vacancy and the monthly costs such as utilities, insurance and upkeep.
3. Enter the project cost to see the yearly income and the payback time.

Why it matters

A legal basement suite can add income and value, but only if it is built to code and registered where the city requires it. The calculator shows the payback period, so you can compare the project cost with the income and decide how big a project makes sense.

Tips from the job site

• Use a cautious rent and a realistic vacancy.
• Check zoning, parking and fire code rules for second units in your city.
• Ask us for a quote with the exact scope to get a real payback number.

These results are estimates. We measure on site before we quote, and we confirm local rules with your city.