Permits for Load-Bearing Wall Removal in the GTA

Yes, removing a load-bearing wall needs a building permit everywhere in the GTA. Ontario's Building Code Act prohibits constructing a building without a permit, and "construct" includes material alteration. The City of Toronto lists "adding or removing walls" as a structural or material alteration that needs a permit, Brampton lists removing load-bearing walls, and Markham lists adding, removing or altering a structural wall or column.

Here's what the law requires, what each GTA city says on its own website, who can prepare the drawings and what happens if you skip the permit.

Why a permit is required: the Building Code Act

Section 8 of the Building Code Act, 1992 says no person shall construct or demolish a building, or cause one to be constructed or demolished, unless the chief building official has issued a permit. The Act defines "construct" to include the material alteration or repair of a building.

Taking out a wall that carries floors or a roof, and replacing it with a beam and posts, is a material alteration of the structure. That's why every municipality treats it as permit work. The technical rules the work must meet come from the 2024 Ontario Building Code (O. Reg. 163/24), which took effect on January 1, 2025.

What GTA municipalities say

Each city runs its own building department, application portal and fee by-law. Here's what their own websites say about wall removal.

Toronto

Toronto Building's "When Do I Need a Building Permit?" page lists, under structural or material alterations, "adding or removing walls (i.e., changing room sizes and/or uses)." It also notes that the owner is responsible for compliance and that failing to get permits can result in costly construction delays, legal action and the removal of completed work.

Wall removals in houses go through Toronto's Interior Alterations permit for small residential buildings. The city's guide for that permit asks for:

• Fully dimensioned floor plans for each level showing existing and proposed construction, including interior partitions and the structural framing above.
• Cross sections showing existing and proposed construction, and footing and foundation wall details.
• Schedule 1: Designer Information for all designers except engineers and architects. Owners who are exempt from the qualification requirements fill it in to state the reason for exemption.
• An Assumption of Responsibility for Engineering Content form when drawings carry a professional engineer's seal.
• All drawings and forms in PDF, submitted online.

If the work involves a party wall, Toronto requires a building permit for every property the party wall separates, each filed by that property's owner or agent.

Mississauga

Mississauga's "When a building permit is required" page lists interior alterations among projects that need a permit, along with new or enlarged door and window openings, underpinning and basement work. Applications go through the city's ePlans portal, and the city's application guide strongly recommends working with a design professional, such as an architect, professional engineer or qualified designer, to prepare complete drawings.

Brampton

Brampton's homeowner brochure says you need a permit if you plan to "install, change or remove partitions and load-bearing walls." Its Residential Addition and Interior Alteration requirements call for Schedule 1, an Applicable Law Checklist, and plans showing the size, type, spacing and location of all structural members, including beams, lintels, columns, joists, bearing walls and partitions. The brochure notes that architects and engineers are exempt from needing a BCIN.

Markham

Markham's building permit process page lists "adding, removing or altering a structural wall or column" as work that needs a permit, and also lists altering a non-loadbearing partition. It states plainly that you need a permit whether the work is inside or outside the dwelling and that there is no exemption for construction done only inside.

Vaughan and other GTA municipalities

Vaughan's Building Standards department handles residential permits, and the same Building Code Act requirement applies there and in every other Ontario municipality, including Oakville, Burlington, Richmond Hill and the Durham Region municipalities. Requirements for drawings, forms and online submission differ from city to city, so check your municipality's building permit page or call the building department before you apply.

Who can prepare the drawings

Division C, Part 3 of the Ontario Building Code sets out who may carry out design activities for a permit:

• Professional engineers and architects can design under their own licences. Toronto and Brampton both exempt them from the Schedule 1 designer form.
• Registered designers must hold a Building Code Identification Number (BCIN) in the right category, and their drawings must show their name, registration and qualification numbers and a statement that they've taken responsibility for the design.
• Homeowners are exempt from the designer qualification requirements for construction of a house they own.

The exemption doesn't change the engineering. The Part 9 tables cover only simple beams under uniform floor loads, as explained in our steel beam span tables guide. Most wall removals put concentrated loads on the beam and the posts below, which takes the design into Part 4 of the code, and that in practice means a structural engineer. The building department reviews the design; it doesn't produce it for you.

Timelines and inspections

Division C, Article 1.3.1.3 of the Code sets the time a building department has to issue or refuse a permit once it has a complete application. For a house where no dwelling unit sits above another, that's 10 days, not counting Saturdays, holidays and other days the office is closed. The clock only starts when the application is complete, which is why missing documents are the usual cause of delay.

Once the permit is issued, the permit holder must notify the building department at set stages under Article 1.3.5.1 of Division C. For a wall removal, the important ones are usually:

• Readiness to construct footings, if new footings are needed under posts in the basement.
• Substantial completion of structural framing, so the inspector can see the beam, posts, connections and bearing before anything is covered.

Under section 13 of the Building Code Act, an inspector can order that work not be covered or enclosed until it has been inspected. Drywalling over a new beam before the framing inspection is a reliable way to end up opening the ceiling again.

What happens if you remove a wall without a permit

Under section 36 of the Building Code Act, contravening the Act or its regulations is an offence, and a person convicted faces fines that increase for a subsequent offence and are much higher for corporations. Inspectors can issue orders, and under section 14 the chief building official can order work to stop if those orders aren't followed.

The practical problems are often worse than the legal ones:

• Hidden work has to be exposed. An inspector may need to see a beam, its bearing and the posts and footings under it, which means opening finished walls and ceilings.
• The work may not meet the Code. Without an engineer's design, beams and posts are often undersized, and point loads may land on footings that weren't built for them.
• Insurance and resale. Brampton's brochure lists problems with home insurance claims and resale among the reasons to get a permit. Unpermitted structural work can come up during a sale and stall it.

If a wall has already been removed without a permit, talk to your building department about bringing the work into compliance rather than waiting for it to surface.

Getting the steel right for your permit

Once your engineer's drawings are approved, the beam and posts have to be built exactly as specified, because that's what the inspector checks. For a breakdown of what the whole job involves, see load-bearing wall removal cost, and if the load path reaches the basement, installing a steel beam in a basement.

Send us your approved or draft drawings and we'll quote the beam, posts and plates, fabricated with holes and connections to match the design. See our services for fabrication, delivery and installation, or reach us through the contact page with questions about your project.