Where the line falls in Markham
If the work changes the structure of the house, or alters the plumbing, heating, cooling or electrical systems, you generally need a permit. If the work is cosmetic and leaves those systems where they are, you generally do not. Markham draws one line tighter than most people expect: adding, removing or altering a partition wall needs a permit even when the wall carries no load.
Three systems drive the answer. Structure, plumbing and mechanical run through the City of Markham's building permit process. Electrical runs a separate path through the Electrical Safety Authority, and one permit does not cover the other.
The cleanest test we can give you: a kitchen renovation that keeps every wall and every drain where it is usually needs no building permit, though any electrical work in it still goes through the ESA. Move one drain two metres, or take out a wall, and it does.
Work that needs a permit
Work that touches the bones or the systems of the house. These are the projects we pull permits for as a matter of course:
- Removing or altering a wall, load-bearing or not, and any beam, post or header.
- Building an addition, a second storey or a rear extension.
- Finishing a basement, because it involves framing, egress, insulation, and usually plumbing and mechanical work.
- Adding or relocating a bathroom, or moving plumbing fixtures to new locations.
- Cutting a new window or door opening, or making an existing opening larger.
- Building a secondary suite.
- Structural work to a deck above a certain height, or a deck attached to the house.
- Underpinning or lowering a basement floor.
- Changing the heating or cooling system layout, including new ductwork runs.
Gas work sits under its own licensing regime through the TSSA, and it belongs to a licensed gas fitter regardless of what other permits are open.
Work that usually does not
Finishes. Paint, wallpaper, flooring over an existing subfloor, new trim and baseboard, replacing kitchen cabinets in the same footprint with the same plumbing locations, and swapping a vanity or a toilet in place.
Replacing a window or door without changing the rough opening is on Markham's no-permit list, and so is replacing shingles and swapping kitchen or bathroom cupboards. Making an opening bigger, or changing the roof structure, is not.
This is the principle, not a ruling. Markham applies the Ontario Building Code and its own zoning and property bylaws to your specific address, and the answer depends on the house. Heritage conservation districts add a review. Properties near a watercourse or in a regulated area can involve the conservation authority. Zoning controls how close you can build to a property line and how much of the lot you can cover, which is a separate question from whether the structure is sound.
Confirm your specific scope with the City of Markham's building department or with your designer before you commit. That call is free, and it is faster than the alternative.
Removing a wall
In Markham, yes, whether or not the wall carries load. If it does, you also need a designer or engineer to size the beam that replaces it, and that is the part that decides the cost.
Do not decide this yourself from the direction the floor joists run. We have opened walls that looked like partitions and found a point load from a roof ridge landing on them, transferred down through two storeys by a previous renovation nobody documented. That is the situation permits exist to prevent, and it is why we open a small inspection hole before anyone quotes a wall removal as a simple job.
What happens if you skip it
Three problems can follow, and each arrives at a different time. The city can order the work exposed, corrected or removed. Your insurer can question a claim connected to unpermitted work. And the buyer's lawyer will ask for permits at resale, where a basement without them becomes a negotiating point.
The resale problem is the one homeowners underestimate. A finished basement with closed permits is a selling feature. A finished basement with no paperwork is a liability the buyer prices into their offer, or a condition that stalls the deal while everyone works out what happens next.
The insurance problem shows up later. You will not discover the answer until you have a claim, and by then the work is behind drywall and the contractor is gone.
What the process asks of you
Drawings, a completed application, and a review by the city. For structural work the drawings have to be prepared by someone qualified, which means a designer with the right qualifications or an engineer, depending on the scope. During construction, inspections happen at defined stages and the work has to be left open and visible for each one.
We will not quote a fee or a timeline here. Both change, both depend on scope, and you should get the current numbers from the City of Markham rather than from a blog post. What we can tell you is that the review takes real time and belongs in your schedule from day one.
Who pulls it, and who holds it
The permit is issued to you as the owner, and the contract says we manage it. Our drawings are prepared to permit standard from the start, we prepare and submit the application, we respond to city comments, and we schedule the inspections so the trades are not standing around and the work is not covered up before an inspector sees it.
Coordinating inspections against a framing schedule is where projects lose weeks. When the same firm drew it, submitted it and is building it, nobody is waiting on anyone else to send a file.
Send us your address and a plain description of what you want to do, including whether any wall is coming out and whether any plumbing is moving. We will tell you which side of the permit line your project lands on and what the drawings will need to show. Start a conversation.