What permit fees and inspection costs should I budget for when drywalling a new Toronto basement apartment?

Finishing a basement apartment in Toronto requires a building permit, and the permit fee alone typically runs $1,500–$3,500 depending on the scope and declared construction value — but that's just the starting point.

Toronto's permit fee structure is based on the estimated construction value of the project. The City of Toronto uses a tiered rate, currently around $17–$22 per $1,000 of construction value for residential renovations, with a minimum fee in the $200–$300 range. A typical basement apartment with new framing, insulation, drywall, electrical, plumbing, and a kitchen or bathroom will have a declared construction value of $60,000–$120,000, which puts permit fees in that $1,500–$3,500 range. Be honest with your declared value — inspectors are experienced and undervaluing the project to reduce fees can result in stop-work orders and penalties.

Beyond the base permit fee, Toronto charges separately for certain inspections and associated applications. If your basement apartment requires a zoning review (which it almost certainly will, since Toronto has specific rules about secondary suites under the Zoning By-law), there may be a zoning certificate fee of $200–$500. If the project triggers a site plan or Committee of Adjustment application — less common for straightforward basement apartments but possible on smaller lots — costs escalate significantly into the thousands.

What the Permit Covers for Drywall Specifically

The building permit for a basement apartment covers the entire scope, not just drywall — but drywall is one of the most permit-critical elements because of fire separation requirements. Under the Ontario Building Code, a basement apartment (secondary suite) requires a 45-minute fire separation between the suite and the rest of the house. This means the ceiling of the basement apartment (the underside of the main floor) and any shared walls must be drywalled with 5/8-inch Type X drywall, with all joints taped and finished. The inspector will check this specifically before you close up any assemblies.

You'll also need a fire-rated door with a self-closer between the suite and any shared spaces. Smoke alarms and carbon monoxide detectors must be interconnected throughout the house. These aren't drywall items, but they're inspected at the same time and failing them delays your drywall sign-off.

Inspection Stages That Affect Your Drywall Schedule

Toronto Building requires inspections at multiple stages, and you cannot drywall until the framing, insulation, vapour barrier, and rough-in electrical and plumbing have been inspected and approved. Booking inspections through the City of Toronto's online portal (Toronto Building's ePLAN system) typically takes 5–10 business days for a standard residential inspection. In busy seasons (spring and fall), wait times can stretch to 2 weeks. Factor this into your drywall contractor's schedule — they cannot start hanging until you have your framing/rough-in inspection sign-off.

The typical inspection sequence for a Toronto basement apartment is: framing inspection → rough-in mechanical/electrical inspection → insulation and vapour barrier inspection → drywall inspection (before taping, so the inspector can see screw spacing and board placement) → final inspection. Some inspectors will combine stages; others won't. Budget for 4–6 inspection visits total.

Full Permit Budget to Expect

Pulling everything together, here's a realistic permit and inspection budget for a Toronto basement apartment:

Building permit fee: $1,500–$3,500. Zoning certificate (if required): $200–$500. Registered architect or designer drawings (required for permit submission in Toronto — you cannot submit hand-drawn plans): $1,500–$4,000. Total permit-related costs before a single nail is driven: $3,200–$8,000 is a reasonable planning figure.

One critical note on the vapour barrier: Ontario Building Code Climate Zone 6 requirements mandate a 6-mil polyethylene vapour barrier on the warm side of all insulated exterior walls before drywall goes up. The inspector will look for this specifically. Missing or improperly lapped vapour barrier is one of the most common reasons Toronto basement apartment inspections fail at the insulation stage, which delays your drywall start and costs you time and money.

If you're planning a basement apartment and want to get matched with a drywall contractor who has experience with Toronto secondary suite fire separation requirements, Toronto Drywall Installers can connect you with local professionals through the Toronto Construction Network. You can also find general contractors experienced with permit coordination at torontoconstructionnetwork.com.