Do I need a permit to remove a non-load-bearing wall with drywall in my Toronto semi-detached home?

In most cases, yes — you need a building permit to remove a wall in your Toronto semi-detached home, even if you believe it's non-load-bearing. The City of Toronto requires a building permit for the removal of interior walls because determining whether a wall is truly non-load-bearing requires professional structural assessment, and removal affects the overall building performance including fire separations, sound transmission, and potentially the structural system.

The critical issue with semi-detached homes specifically is the shared party wall between your unit and your neighbour's. The party wall is a fire separation that must maintain a minimum 1-hour fire resistance rating under the Ontario Building Code, and it also must meet STC 50 (Sound Transmission Class 50) requirements. While you wouldn't be removing the party wall itself, removing an interior wall that connects to or intersects with the party wall can compromise the fire separation's integrity. A building inspector needs to verify that the fire rating is maintained after any wall removal.

Even for interior walls that don't connect to the party wall, the City of Toronto's permitting requirements apply when you're removing partition walls because of the potential structural implications. Many walls that homeowners assume are non-load-bearing actually carry some structural load — particularly in older Toronto semi-detached homes in neighbourhoods like Leslieville, Riverdale, the Annex, and Roncesvalles, where the original construction may have been modified over decades in ways that changed how loads are distributed. A wall that was originally non-structural may have become load-bearing if previous renovations altered the framing above.

Getting the permit is straightforward. You'll need to submit drawings showing the existing layout and the proposed changes. The City will likely require a structural engineer's letter or stamped drawings confirming that the wall is non-load-bearing and that its removal won't affect the building's structural integrity. A structural engineer's assessment typically costs $300–$800 in the GTA, and it's money well spent — removing a load-bearing wall without proper support can cause sagging floors, cracked ceilings throughout the house, and potentially catastrophic structural failure.

The building permit for a wall removal in Toronto typically costs $200–$500 depending on the scope of the project. The process usually involves two inspections: one after demolition to verify the removed wall's connections have been properly addressed, and one after the drywall finishing is complete.

What the Drywall Work Involves

Once the wall is removed, you'll need drywall work to patch and finish the ceiling where the wall was attached, blend the floor-to-wall transitions, and finish any newly exposed surfaces. In a semi-detached home, this typically involves patching the ceiling along the line where the wall was removed (often a 4–8 foot run), finishing the adjacent walls where they connected to the removed wall, and potentially skim coating a larger area of the ceiling to blend the patch seamlessly.

The drywall patching and finishing after a wall removal in a semi-detached home typically runs $800–$2,500 depending on the size of the wall, the condition of the surrounding drywall, and the finish level required. If the existing ceiling has a textured finish (stipple, popcorn, or knockdown), matching that texture on the patched area adds complexity and cost — many homeowners take the opportunity to remove the old texture from the entire ceiling and go with a smooth Level 4 or Level 5 finish for a clean, modern look. Ceiling texture removal runs $2.00–$5.00 per square foot including skim coating.

One practical tip: in older Toronto semi-detached homes, the walls may contain plaster and lath rather than modern drywall. Removing a plaster wall generates significantly more dust and debris than removing drywall, and the patching work to blend new drywall into existing plaster surfaces requires a skilled finisher. If your home was built before 1990, have the wall materials tested for asbestos before any demolition begins — joint compound and textured finishes from that era frequently contain asbestos, and Ontario Regulation 278/05 requires certified abatement if asbestos is present.

Need a drywall professional to handle the finishing work after your wall removal? Toronto Drywall Installers can match you with experienced local contractors for a free estimate.