Legal Suite ROI Calculator

How This Calculator Works

This calculator uses your inputs to model an illustrative planning scenario for a legal secondary suite in your Calgary home. It is simple arithmetic, not a quote, appraisal, funding decision, tax advice, or investment forecast. Actual costs, rent, approvals, expenses, financing, and property value can differ materially.

Key Assumptions

• Rental income is gross. Before vacancy, maintenance, and insurance costs which are captured in the expenses slider
• SSIP amount. The optional up-to-$10,000 amount is a planning input only. The City currently lists new applications as waitlisted; confirm the live program rules, intake, and eligibility before relying on any amount. Use our SSIP Eligibility Checker as a screening aid
• Property value increase. The percentage is a user-selected scenario, not a Calgary market claim or appraisal. Ask a qualified appraiser or real-estate professional about your property
• Expenses. The slider is a planning assumption for vacancy, maintenance, insurance, and other operating costs. Your actual costs may be higher or lower
• Savings comparison. Uses an illustrative 4% annual return compounded; rates and products change, so this is not a guaranteed alternative return

Official program references

Check the City of Calgary Secondary Suite Incentive Program, secondary-suite permit guidance, and secondary-suite requirements for current rules. OAF cannot confirm funding or approvals through this calculator.

What Affects Your Actual ROI

Several factors can push your real-world returns higher or lower than these estimates:

• Location. Suites in inner-city Calgary neighbourhoods command higher rents than suburban areas
• Suite quality. Premium finishes and separate entrances attract better tenants and higher rents
• Tenant management. Vacancy rates vary. Good tenant screening and maintenance reduce turnover
• Market conditions. Calgary rental rates have been climbing since 2023, but future rates are not guaranteed
• Tax implications. Rental income is taxable. Consult an accountant for your specific situation

Ready for Real Numbers?

This calculator provides estimates based on Calgary market averages. For a precise, fixed-price quote for your legal suite project, get a free quote with OAF Construction. We will assess your specific home, provide a detailed cost breakdown, and help you understand the true ROI for your property.