Ottawa's red-hot rental market has made basement income suites one of the most financially rewarding renovations a homeowner can undertake. With average one-bedroom rents in Ottawa exceeding $1,800 per month in 2026, a properly built legal income suite can generate $18,000 to $24,000 in annual rental income — paying for itself in 4 to 6 years while adding significant value to your property. This guide covers everything Ottawa homeowners need to know about building a legal income suite.
Understanding Ottawa's regulations for secondary suites is the essential first step.
As of the latest zoning bylaw updates, the City of Ottawa permits secondary suites in most residential zones across the city. Both basement suites and above-grade suites (such as coach houses or garden suites) are permitted in many zones. Your property must be able to accommodate parking requirement...
Ontario Building Code requirements for secondary suites are specific and non-negotiable. Key requirements include: minimum ceiling height of 1.95 metres (6 feet 5 inches) in habitable rooms and 1.8 metres in hallways and bathrooms; fire separation between the suite and the main dwelling (typically 4...
Income suite construction costs depend on the current condition of your basement.
A basic legal income suite in an already partially finished Ottawa basement costs $60,000 to $85,000. A full conversion from unfinished basement to legal suite costs $85,000 to $120,000. Suites requiring a separate entrance excavation add $15,000 to $30,000. Underpinning to increase ceiling height c...
At an average Ottawa one-bedroom rental rate of $1,800 to $2,000 per month, a $90,000 income suite generates $21,600 to $24,000 in annual gross rental income. After deducting expenses, net annual income is typically $15,000 to $18,000. This represents a 17 to 20 percent annual return on investment. ...
A well-managed income suite project follows a structured process.
The process begins with a professional assessment of your basement's suitability — ceiling height, foundation condition, existing plumbing and electrical infrastructure, and moisture levels. Your contractor should then prepare design drawings that comply with Ontario Building Code requirements. The ...
Construction typically takes 8 to 14 weeks for a full income suite conversion. Key phases include demolition and rough framing, rough plumbing and drainage, rough electrical, HVAC ductwork and ventilation, fire separation installation, insulation, drywall and taping, flooring, kitchen and bathroom i...
Income suite construction requires a contractor with specific experience in building code-compliant secondary suites.
Your income suite contractor should have completed at least 5 legal income suites in Ottawa that have passed final City inspection. Ask for references from these specific projects. The contractor should carry minimum $2 million CGL insurance and current WSIB coverage. Ask the contractor to walk you ...
Your income suite contract should include a fixed-price clause covering all work from current condition to tenant-ready, including all permit fees and inspections. Include a clause requiring the contractor to obtain final occupancy approval from the City before the final payment is released.
Building an income suite has implications beyond construction.
Notify your home insurance provider before construction begins — adding a rental suite changes your coverage requirements and premium. Rental income is taxable but you can deduct a portion of mortgage interest, property taxes, insurance, utilities, and maintenance costs associated with the rental po...
As a landlord in Ontario, you are bound by the Residential Tenancies Act. You must provide a habitable dwelling that meets all building code and fire code requirements, maintain all systems in working order, give proper notice before entry (24 hours minimum), and follow proper procedures for rent in...
A legal income suite costs $60,000 to $85,000 for a basic conversion in a partially finished basement and $85,000 to $120,000 for a full conversion. Adding a separate entrance adds $15,000 to $30,000.
A one-bedroom income suite in Ottawa rents for $1,800 to $2,000 per month in 2026, generating $21,600 to $24,000 in annual gross rental income.
Yes, secondary suites including basement apartments are legal in most residential zones in Ottawa, provided they meet Ontario Building Code requirements and receive a building permit and final occupancy approval.
The Ontario Building Code requires a minimum ceiling height of 1.95 metres (6 feet 5 inches) in habitable rooms and 1.8 metres in hallways and bathrooms.
A separate entrance is not always required by code but is strongly recommended for both tenant privacy and rental value.