Start With Ottawa's Actual Prices
Before running mortgage math, let's ground this in Ottawa's 2026 market reality:
- Average detached home: $750,000–$850,000 (suburban), $900,000+ (urban)
- Average semi-detached / townhouse: $550,000–$700,000
- Average condo: $380,000–$520,000
- Ottawa benchmark composite price: ~$660,000
Neighbourhoods like Barrhaven, Kanata, and Orleans offer more house per dollar than Westboro, Glebe, or The Market.
The Affordability Formula
Canadian lenders use two primary ratios to determine what you can afford:
Gross Debt Service (GDS) ≤ 39% Your monthly housing costs (mortgage payment + property tax + heat + 50% of condo fees if applicable) cannot exceed 39% of your gross monthly income.
Total Debt Service (TDS) ≤ 44% All monthly debt payments (housing + car loans + student loans + credit card minimums) cannot exceed 44% of gross monthly income.
Real Ottawa Scenarios
Scenario 1: Single income, $80,000/year
- Gross monthly income: $6,667
- Max GDS payment (39%): ~$2,600
- Subtract tax (~$350) and heat (~$150): leaves ~$2,100 for mortgage
- At 4.7% over 25 years, that supports roughly a $370,000–$390,000 mortgage
- With 10% down ($43,000), you can afford roughly a $430,000 property: a condo in Gloucester or a townhouse in the east end
Scenario 2: Dual income, $160,000 combined
- Gross monthly income: $13,333
- Max GDS payment: ~$5,200
- After tax, heat: ~$4,600 for mortgage
- Supports roughly $780,000–$820,000 mortgage at stress test rate
- With 20% down (~$170,000): can target $950,000–$1,000,000 property: detached in Kanata or Barrhaven
Scenario 3: New permanent resident, 2 years employed, $95,000
- Similar to Scenario 1 but with some debt ($450/month car payment)
- TDS constraint likely limits mortgage to $340,000–$360,000
- Important: paying off the car first could unlock $50,000–$60,000 more in mortgage
Don't Forget These Costs
Affordability isn't just the mortgage payment. Monthly Ottawa homeownership costs also include:
- Property tax: $400–$700/month for a typical Ottawa home
- Home insurance: $100–$200/month
- Utilities (heat, hydro, water): $200–$400/month
- Maintenance reserve: Ideally 1% of home value per year (~$550/month on a $660K home)
- Condo fees if applicable: $300–$700/month
A $660,000 home with a 10% down mortgage at 4.7% costs roughly $3,300/month in mortgage alone. Add property tax, insurance, utilities, and maintenance, and you're looking at $4,500–$5,000/month all-in.
The Rule of Thumb Check
A quick sanity check: your home price should generally be no more than 4–5x your gross household income. At Ottawa prices, this means:
- $100K income → target $400K–$500K
- $150K income → target $600K–$750K
- $200K income → target $800K–$1M
Getting a Real Number
The best way to know exactly what you can afford is to get a mortgage pre-approval from a broker, not just a bank. They'll review your full financial picture and give you a firm number. Do this before you start house hunting in Ottawa; it will save you time and heartache.
