How much does a basement apartment conversion cost in Canada?

A standard-quality 1000 sqft legal basement apartment in Toronto runs $51,000–$104,400 with all required code items. Premium quality reaches $90K–$186K. Costs vary by city: Vancouver runs ~25% above the Canadian baseline, Winnipeg ~10% below. Use the calculator above for a city-specific estimate.

Do I need a permit to build a basement apartment?

Yes. Every Canadian province requires building permits, electrical inspections (ESA in Ontario, Electrical Safety Branch in BC, etc.), and plumbing inspections for a legal secondary suite. Zoning compliance with your municipality is also mandatory. Skipping permits creates insurance, mortgage, and resale risks.

What's the difference between a finished basement and a basement apartment?

A finished basement is for the homeowner's personal use (rec room, gym, guest space) and can skip a kitchen, separate entrance, and egress windows. A basement apartment is a legal dwelling unit that must include a kitchen, full bathroom, bedroom with egress window, separate entrance, fire-rated separation, and pass municipal inspections. Costs typically run 50–80% higher than a finished basement of the same size.

How long does a basement apartment conversion take?

Plan 16–30 weeks total: 4–8 weeks for permits and design, 12–20 weeks for construction. Adding a separate entrance with foundation cuts adds 2–4 weeks. Quebec projects (RBQ) and complex code separation requirements can extend timelines further.

Basement Apartment Cost Calculator — Canada 2026

Converting a basement into a legal secondary suite is one of the most financially compelling projects a Canadian homeowner can undertake — rental income in major cities often covers a significant portion of the mortgage. But a legal suite costs 50–80% more than a standard finished basement of the same size because it must meet an entirely different set of building code requirements: fire-rated separation, a full kitchen, bedroom egress windows, and a separate entrance. In Toronto, a code-compliant 1,000 sq ft unit runs $51,000–$104,000; Vancouver costs run approximately 25% higher.

This calculator is built specifically for secondary suite conversions — not general basement finishing. Configure your suite's square footage, separate entrance type (interior stairwell or exterior foundation cut), kitchen tier, bathroom count, fire separation requirements, electrical panel upgrade, and permit costs for your municipality. The estimate reflects the higher labour and material standards required for a unit that must pass formal inspections in your province.

Before you budget, confirm your property's zoning allows a secondary suite — most Canadian municipalities now permit them by right, but some still require a rezoning application. Pull the permit early: inspectors need access at framing, rough-in, and final stages, and permit timelines often drive the overall project schedule more than construction.

Renovation Cost Calculator

Basement Apartment

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Typical cost breakdown (standard tier, national average, 2026)

Item	Typical range
Framing, Drywall, Insulation, Ceiling & Code Separation	$11,000 – $25,000
Bathroom	$8,000 – $18,000
Kitchen	$8,000 – $16,000
Electrical	$2,500 – $5,500
Bedroom & Egress Window	$4,500 – $10,000
Separate Entrance	$10,000 – $22,000
Permits & Inspections	$2,000 – $4,500
Flooring	$3,000 – $7,000
Total	$49,000 – $108,000

Cost by city (standard tier, 2026)

City	Typical range
Toronto	$52,430 – $115,560
Vancouver	$60,760 – $133,920
Montreal	$45,570 – $100,440
Calgary	$56,350 – $124,200
Ottawa	$47,040 – $103,680
Edmonton	$55,370 – $122,040
Winnipeg	$54,390 – $119,880
Halifax	$45,080 – $99,360
Quebec City	$41,160 – $90,720
Saskatoon	$54,390 – $119,880
Regina	$53,410 – $117,720
St. John's	$48,020 – $105,840