Demolition Tips, Permits and Regulations

Do I Need a Permit to Demolish a Shed or Small Structure in Ontario?

Here is the short answer to the shed and garage demolition question most Ontario homeowners are asking: in much of the province, you do not need a building permit to tear down a small detached shed under 10 square metres, but a shed demolition permit in Ontario becomes mandatory the moment plumbing, size, heritage rules, or your local zoning bylaw enters the picture.

That gap between “go ahead” and “stop and file paperwork” is where people get into trouble. Below is exactly where the line sits, what your municipality actually checks, and how to take down a small structure without a surprise stop-work order or fine.

In this article

The Short Answer for Ontario Homeowners

Ontario runs on one province-wide rulebook, the Building Code, plus a local layer of bylaws that change with your city. Under the Building Code, a detached accessory structure that is 10 square metres (about 108 square feet) or smaller and has no plumbing generally does not need a building permit to construct. That same threshold is the starting point most municipalities use when deciding whether demolishing one needs paperwork.

So a typical 8 by 8 backyard storage shed sitting on a gravel or block base usually comes down without a permit. A 12-by-20 garden studio with a poured foundation, a water line, or electrical service is a different animal. The size of the building and what runs into it decide almost everything.

Quick Take

No permit is usually needed for a detached, unplumbed shed of 10 square metres or less. Over that size, or with water, gas, or a permanent foundation, call your local building department before you touch it.

Small detached backyard shed on a gravel base, the kind often exempt from a demolition permit
A small, unplumbed shed on a simple base usually comes down without a permit.

When You Do Not Need a Permit

Most small backyard structures fall into the no-permit zone. You can generally skip a building or demolition permit when all of the following are true:

  • The structure is detached and 10 square metres (108 square feet) or smaller.
  • It has no plumbing, no gas line, and no permanent electrical connection wired into your panel.
  • It sits on a simple base (gravel, patio stones, skids, or a floating slab) rather than a full poured foundation or footings.
  • It is not a heritage-designated building and is not inside a conservation authority-regulated area.
  • Your local zoning bylaw does not flag the structure or its removal for review.

Did You Know

Even when no permit is required, your municipality can still ask you to disconnect utilities safely and dispose of waste at a licensed facility. “No permit” means no application fee, not no rules. Asbestos in older shed siding or roofing shingles, for example, is regulated no matter how small the building is.

When a Shed Demolition Permit Is Required

Cross any one of these lines and you move from “weekend project” to “file for a permit first.” A shed demolition permit in Ontario is typically required when:

  1. The structure is larger than 10 square metres, or is a garage, workshop, or studio rather than a simple shed.
  2. It contains plumbing, a gas line, or hard-wired electrical that has to be capped and disconnected by a licensed trade.
  3. It sits on a permanent foundation, footings, or a basement that also has to come out.
  4. The building is attached to your house or another structure, which turns it into partial building demolition.
  5. The property or the structure is heritage-designated, or sits within a conservation authority regulated zone or floodplain.

The tricky part is that “shed” is not a legal category. Your building department cares about square footage, services, and how the thing is anchored to the ground, not what you call it. When a backyard building has power and water and a slab, expect to file. For a plain-English overview of provincial rules, the Ontario Building Code overview from the province is the right starting point, and your city’s building department confirms the local specifics.

Red Flag: Older Structures

Sheds and garages built before the 1990s can hide asbestos in siding, floor tiles, and roofing felt, plus lead paint. If your structure is that old, do not start swinging a hammer until the material is tested. Disturbing asbestos without controls is both a health hazard and a serious Ministry of Labour violation.

Decision guide showing when a shed demolition permit is required in Ontario by size, services, and foundation
A quick decision guide for small-structure demolition permits.

Permits and Zoning Are Two Different Checks

This is where homeowners trip. A demolition permit is a safety and process document: it tells the city you are removing a structure so records, utilities, and waste are handled properly. Zoning is a separate question about what is allowed to sit on your lot. Removing a shed rarely creates a zoning problem, but replacing it with something bigger, or clearing an accessory building that was tied to a legal non-conforming use, can.

If your only goal is to get rid of an old shed, zoning is usually a non-issue. If demolition is step one of a bigger plan, like a home demolition or a new build, check both boxes before you start so you do not clear the site and then discover you cannot put back what you wanted.

People Often Ask: Do I Need a Permit to Remove a Shed on a Concrete Slab?

The shed itself may be small enough to skip a permit, but a poured slab or foundation is where many cities draw the line. Removing a slab often counts as more than accessory-structure work, and the concrete has to go to a licensed facility. Confirm with your building department, and factor slab breakout and haul-away into your budget.

Shed demolition debris sorted and loaded into a disposal bin for licensed disposal
Debris has to be sorted and taken to a licensed disposal facility.

Shed Demolition Permit Costs and Timeline

When a permit is required, the cost is usually modest next to the demolition work itself. Fees, waiting times, and what triggers them vary by municipality, so treat the ranges below as GTA planning figures, not quotes.

Scenario Permit Usually Needed? Typical Permit Cost Typical Timeline
Detached shed 10 sq m or less, no services No $0 Same day, no wait
Shed 10 to 20 sq m, no services Sometimes $100 to $250 A few days to 2 weeks
Garage or studio with power or water Yes $150 to $400+ 1 to 3 weeks
Structure on a permanent foundation or slab Yes $200 to $500+ 2 to 4 weeks
Heritage or conservation-area structure Yes, plus extra review Varies widely 4 weeks or longer

Pricing note: These are typical GTA municipal figures as of 2026 and cover the permit only, not demolition, utility disconnection, or disposal. Actual fees and timelines vary by city and change over time. Always confirm the current fee with your local building department and get a written quote for the demolition work itself.

Save Your Money

Bundling matters. If a shed sits near a garage, deck, or fence you also want gone, removing everything in one mobilization is far cheaper than paying separate trip and disposal charges for each. Plan the whole cleanup at once and you spread the fixed costs across more work.

How to Demolish a Small Structure Safely

The steps below are general guidance for small, unplumbed structures only. Demolition involves sharp debris, dust, and hidden hazards like asbestos, buried utilities, and unstable framing. If the structure has power, gas, water, a foundation, or any material you suspect contains asbestos, stop and hire a licensed contractor. ALMAR Demolition is not responsible for injury, damage, or cost from work attempted based on this article.

  1. Confirm the rules. Call your municipal building department, confirm whether a permit is needed for your exact size and services, and ask about waste disposal requirements.
  2. Locate and disconnect services. Have any power, water, or gas safely capped by a licensed trade. Never cut a line yourself.
  3. Test for hazardous materials. For any structure built before the 1990s, have siding, flooring, and roofing tested for asbestos before demolition.
  4. Clear and protect the area. Empty the structure, move vehicles and patio furniture, and protect nearby fences, gardens, and neighbouring property.
  5. Take it down in order. Remove doors, windows, and roofing first, then walls, then the frame, working from the top down to keep the structure stable.
  6. Separate and haul the debris. Sort wood, metal, and concrete for recycling where possible, and take everything to a licensed disposal facility.
  7. Deal with the base. Remove skids or, if you have the right permissions, break out and haul away any slab or footings.
  8. Confirm the site is clear. Rake for nails and screws, fill any holes, and keep your permit and disposal receipts for your records.

Pro Tip

Photograph the structure and its utility connections before you start. If a question comes up later with the city, your insurer, or a future buyer, dated photos showing the shed was removed cleanly and services were properly capped will save a lot of back-and-forth.

Download the free quick guide

A one-page checklist to confirm whether your shed needs a permit and how to take it down cleanly.

Download the free shed demolition checklist (PDF)

Frequently Asked Questions

Do I need a permit to demolish a shed in Ontario? +

Usually not, if the shed is detached, 10 square metres or smaller, and has no plumbing, gas, or hard-wired electrical. Once the structure is larger, sits on a permanent foundation, has services running to it, or is heritage or conservation regulated, a demolition permit is typically required. Because the size threshold and local rules vary, confirm with your municipal building department before you start. It is a quick phone call that can save you a stop-work order.

How much does a shed demolition permit cost in Ontario? +

When a permit is needed, expect roughly $100 to $500 depending on the structure and your municipality, with larger or foundation-supported buildings at the higher end. That fee covers the permit only, not the demolition, utility disconnection, or disposal. Many small sheds need no permit at all, so your first step is confirming whether your specific structure requires one before budgeting for a fee.

What is the size limit for a shed without a permit in Ontario? +

The common threshold is 10 square metres, about 108 square feet, for a detached accessory structure with no plumbing. That is the Building Code line most municipalities start from. Some cities apply their own limits or extra conditions, so a 10 by 12 shed that is over the threshold may still need review in one town and not another. Always verify locally.

Can I remove a shed on a concrete slab myself? +

The shed above the slab may be small enough to skip a permit, but removing the concrete slab or foundation is often treated differently and can require a permit plus disposal at a licensed facility. Breaking out concrete is heavy, dusty work, and the material cannot go in regular garbage. For anything beyond a light gravel or paver base, it is worth getting a demolition contractor to quote the slab removal.

What happens if I demolish a shed without a required permit? +

If a permit was required and you skip it, your municipality can issue a stop-work order, charge fines, and require you to prove the work met code after the fact. It can also complicate a future home sale if records do not match the property. The safest move is a five-minute call to your building department up front. For a deeper look, see our guide on what happens when you demolish without a permit.

Not sure whether your shed, garage, or backyard structure needs a permit? ALMAR Demolition handles the whole job, from checking local requirements to safe teardown and clean disposal, across Toronto, Mississauga, Vaughan, and the wider GTA. Get a free estimate and we will tell you straight whether a permit applies before any work begins.