Do You Need a Permit to Build a Deck in Ontario?
It's one of the first questions homeowners ask when they start planning a new deck, and the answer can save you real trouble later. Building without a required permit can mean fines, being forced to remove the deck, or problems when you sell your home.
Here's what you need to know before you build in Innisfil, Barrie, Bradford and the rest of Simcoe County and York Region.
The general rule
In most Ontario municipalities, a deck needs a building permit if it is:
More than 24 inches (about 600 mm) above the ground at any point, or
Larger than 100 square feet (about 10 square metres), or
Attached to your house
Low, small, freestanding platforms often don't need one. But rules vary by municipality, and zoning bylaws still apply even when a permit isn't required. Always confirm with your local building department before you start.
Why permits exist
Deck permits aren't just paperwork. The review checks things that affect safety:
Footings that sit below the frost line, so the deck doesn't heave in winter
Beam and joist sizing for the span and expected load
Guards (railings) at the correct height where the deck is raised
Stairs with safe rise and run
The ledger connection where a deck attaches to the house
Inspections at key stages confirm the work matches the approved drawings.
Zoning: the other half of the question
Even a deck that doesn't need a building permit has to follow zoning rules. These typically cover:
Setbacks from property lines
Lot coverage limits
Height limits
Easements and utility corridors
Sheds have their own size limits under zoning, and driveway widening often needs approval too.
What the permit process looks like
Design and drawings. A site plan showing the deck location, plus construction drawings with footing, framing and railing details.
Application. Submitted to your municipality with the required fee.
Review. Timelines vary by municipality and season. Spring is busy, so applying in winter helps.
Inspections. Usually at the footing stage and at final completion, sometimes at framing.
Utility locates come first
Before any digging for footings, utilities must be located. It's the law. Ontario One Call provides free locates for water, hydro, gas, telephone and internet lines. Locates are only valid for 30 days, so timing matters when you plan a start date.
Wood or composite: does it change the permit?
No. The material doesn't change whether you need a permit, but it does affect framing. Composite decking often requires closer joist spacing than wood. Your drawings should reflect the decking you actually plan to use.
Let us handle it
At Klutch Landscaping, we take care of drawings, permit applications and utility locates on every deck we build, so you don't have to chase paperwork. Every carpentry project comes with a three-year workmanship warranty.
See our recent decks and carpentry projects, read more in our FAQ, or book a consultation to start planning.
Comments