Most GTA basement suites now rent for $1,700–$2,400 a month. Here's the real math on building one — and what separates a legal suite from an expensive mistake.
Every week, a GTA homeowner asks us some version of the same question: "If I finish my basement as an apartment, what would it actually earn?"
It's the right question. A basement suite is the only renovation that doesn't just add value to your home — it sends you a cheque every month. So let's answer it properly, with current numbers and the honest math we walk through at real kitchen tables across the GTA.
Across the GTA, a well-finished one-bedroom basement apartment typically rents for $1,700 to $2,400 per month in 2026. Location moves the number: strong Toronto and East York pockets can approach $2,400–$2,600 for a bright, legal, well-designed suite, while parts of Scarborough and North York settle closer to $1,400–$1,700.
Call it $20,000 to $29,000 per year in gross rental income for a typical suite — from square footage that's currently storing boxes.
💡 What pushes a suite to the top of the range: a proper separate entrance, real ceiling height, big egress windows (light is everything below grade), in-suite laundry, and finishes that match the rest of your home. Tenants pay for a suite that doesn't feel like a basement.
A purpose-built legal basement apartment is the most involved basement project we build — it's a self-contained home, with its own kitchen, bathroom, entrance and fire separation. Based on typical Desire projects, the full package usually lands in the $75,000–$110,000+ range depending on size, entrance excavation and finishes. Our GTA cost guide breaks down the base build, and every Desire quote is itemized line by line and locked before you sign.
Put those two numbers together. A suite that costs $90,000 to build and rents for $2,000 a month grosses $24,000 a year — a payback horizon of roughly four to six years, before accounting for the resale value the suite adds to the house itself. Few investments a homeowner can make touch that combination of income and equity.
Sample math — typical GTA suite: build cost (800 sq ft legal suite) ~$90,000 · monthly rent ~$2,000 → $24,000/year · gross payback ~4–6 years — plus added resale value and a mortgage helper for decades after.
Here's the part some contractors won't tell you: an illegal suite earns the same rent right up until it doesn't. Unregistered or non-compliant units risk municipal orders, insurance problems and having to expose finished work for inspection. Legal means a building permit, proper fire separation, interconnected alarms, compliant egress and ceiling height — and in cities like Brampton and Barrie, registration of the two-unit dwelling.
The good news: under Ontario's updated housing rules, secondary suites are now permitted as-of-right on most urban residential lots — in Toronto, there's no minor variance and no parking requirement for the unit. Toronto's multiplex bylaw goes further still, allowing up to four units as-of-right on many residential lots — meaning a basement suite can often sit alongside additional units in the same house without a rezoning application. We handle the drawings, permits and every staged inspection as part of the build — see our structural and legal suites page for how separate entrances and underpinning fit in.
After 400+ GTA basements, the pattern is clear. Suites underperform when ceilings are borderline (underpinning fixes this permanently), when the entrance feels like an afterthought, when moisture was painted over instead of solved, and when the kitchen is a "bar with a hotplate" instead of a real kitchen. Build it once, build it legal, build it like the upstairs — and it rents fast, at the top of the range, to tenants who stay.
Most well-finished one-bedroom basement suites rent for $1,700–$2,400 per month in 2026, with prime Toronto locations approaching $2,400–$2,600 and outer areas closer to $1,400–$1,700. Legal status, natural light, a private entrance and finish quality decide where a suite lands in that range.
A typical purpose-built legal suite — kitchen, bathroom, separate entrance, fire separation and finishes — usually lands in the $75,000–$110,000+ range in the GTA depending on size and scope. Every Desire quote is itemized line by line and locked before you sign, with a free 3D design included.
At typical GTA rents, a purpose-built suite often reaches gross payback in roughly four to six years — before counting the resale value it adds to the home. Location, build cost and rent level move the timeline in both directions.
Yes — a building permit is required everywhere, and some municipalities (like Brampton and Barrie) also require two-unit dwellings to be registered. Suites must meet Building Code and Fire Code requirements for ceiling height, egress, fire separation and alarms. Desire Basements handles permits, inspections and registration end to end.
Yes — Toronto's multiplex bylaw allows up to four residential units as-of-right on most residential lots, which means a legal basement suite can often be added alongside other units without a minor variance or rezoning application. It's on top of the province-wide right to a secondary suite already in place across Ontario.
Thinking about turning your basement into income? Book a free in-home consultation — we'll assess your ceiling height, entrance options and layout, and bring a free 3D design of your future suite with a locked, itemized quote.
Let our team help you build the basement or renovation you've been imagining.
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