Is that basement apartment legal? The permit record answers faster than the landlord

A week out from September 1, the listings that are still up are the ones nobody took — and a lot of them are basements. Separate entrance, low ceiling, one window, all utilities included, cash preferred.

Some of those are perfectly good second suites. Some are a rec room with a hotplate. The difference isn't visible on a ten-minute viewing, but it usually is visible in the record.

What "legal" actually means here

The City's term is a second suite: a self-contained dwelling unit inside a house, making two units total, occupied by a separate household. To count as one, it has to clear four separate rulebooks at once — the Zoning Bylaw, the Ontario Building Code, the Fire Code, and the Electrical Code. The City is blunt that there's no shortcut: "There is no quick way to tell if your home meets all of the bylaw requirements for a second suite."

The Building Code numbers are the ones you can eyeball:

• Ceiling height of at least 1.95 m (about 6'5") through habitable rooms, dropping to 1.85 m under beams and ducts.
• An egress window in each bedroom with a clear opening of at least 0.35 m² and no dimension under 380 mm — big enough to climb out of.
• A fire separation between the two units rated for at least 30 minutes.
• Its own means of escape to ground level that doesn't run through the other unit.

That last one is the tell. Toronto Fire flags a shared means of escape — where getting out means walking through your landlord's unit — as one of the main risk factors in two-unit houses.

The paper trail a real conversion leaves

Converting a basement into a legal suite is permitted work. It leaves building permits, usually an electrical inspection, and often a zoning review. So:

• Pull the permit history for the address and look for an alteration or second-suite permit, and whether it was closed or is still open. Our guide to reading a Toronto building permit covers what the status fields mean.
• Check the bylaw investigations record. A neighbour complaint about an illegal unit becomes a Municipal Licensing & Standards file, and investigations escalate into orders.
• A house with no permits and an open property standards file is not a place to put your first and last month.

One wrinkle worth knowing: the Fire Code's two-unit provisions (section 9.8) are written around homes that already had two suites on or before July 14, 1994. An older suite may be held to a different standard than one built last year — so "it's been like this for decades" isn't automatically a red flag, and isn't automatically fine either.

What happens if it turns out to be illegal

Two things, and people usually only expect one.

• You're still a tenant. The Residential Tenancies Act doesn't care whether the unit was legally created. Your rights, your notice periods, and the rent increase guideline apply the same way.
• The unit can be ordered out of existence. The City is explicit that non-compliance with zoning, property standards or the Fire Code "may necessitate the removal of the second suite." That's your home, closed by order, on the City's timeline rather than yours.

There's a smaller one too: outside the old Toronto and East York district, a house with a second suite generally needs two parking spaces. If the driveway fits one car and the landlord is promising you a spot, something doesn't add up.

Before you sign

Run the property snapshot on the address — permits and enforcement history in one view — and ask the landlord for the permit number for the conversion. A landlord with a legal suite can produce it. A landlord who gets annoyed at the question has told you something.

If you sign, monitor the address so a new order or investigation lands in your inbox rather than on your door.

Second suite definition, enforcement and parking rules from the City of Toronto and Toronto Fire Services. Dimensions are from the Ontario Building Code. This is general information, not legal advice.