It’s one of the first questions we hear from Ottawa homeowners planning a new deck: do I actually need a permit for this? The honest answer is “it depends”, but the good news is the City of Ottawa spells out exactly what triggers a permit, and once you know the rules, it’s easy to plan around them.
Here’s what the City actually requires, what happens if you skip it, and how we handle the whole process for you.
Why Permits Matter?
A permit means a City inspector checks your deck while it’s being built, not after. They look at the footings, the framing, and the railings, and compare them to the Ontario Building Code, before any of it gets covered up by decking boards.
That matters for two reasons. First, safety: it confirms your posts are set deep enough to handle Ottawa’s frost, and your railings are actually strong enough to lean on. Second, it protects you later on. If you ever sell your home or need to make an insurance claim, an unpermitted deck can cause problems, there’s no record showing it was built to code.
When Ottawa Requires a Building Permit
According to the City of Ottawa’s official guidance, a permit is required if any of the following apply:
In plain terms: most raised decks attached to the back of a house need a permit, full stop, no matter the square footage. Freestanding decks get a bit more leeway — a small, low platform deck out in the yard can often skip the permit, but once it grows past roughly 108 sq ft and sits over 24 inches off the ground, it needs one too.
These thresholds are set by the City, not by us, and they’re the kind of detail worth double-checking against your specific lot and plans.
A Few Other Things to Plan For
Even when a permit is required, height is only one piece of it. A complete permit application in Ottawa typically also needs:
Consequences of Building Without a Permit
Building a deck without a required permit carries real risk, both during construction and after the project is complete:
Stop-work orders
During construction
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The City can halt construction mid-project until a permit is obtained — your build stops where it stands.
Fines
Also during construction
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Building without a required permit can result in financial penalties on top of the cost of the permit itself.
Costly rework
After the fact
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If decking boards already cover the framing, you may be required to remove them so an inspector can examine the footings and structure underneath.
Problems at resale
Years later, at resale
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Buyers’ lawyers and home inspectors routinely check for permits on any deck that should have one. A missing permit can delay closing or reduce your final sale price.
How Valcor Handles Permits For You
This is exactly the kind of thing we mean when we talk about a worry-free build. As part of our Discover & Plan phase, we determine whether your project needs a permit, prepare the drawings the City requires, and manage the application.
Design & Build: Plan With Confidence
From design concepts to permits and budgeting, we guide you through every decision. You’ll have one main point of contact throughout, which keeps things clear, reduces stress, and keeps the entire process aligned with your expectations and timeline.
Build Your Deck with Valcor Construction
Now that you know the rules, the next step is simple: let’s build something great together.
Every Valcor deck starts with a free, no-obligation consultation. We’ll walk your property, talk through what’s realistic for your space, budget, and timeline, and tell you exactly where your project stands on permits before a single board is ordered. From there, you get one point of contact for the entire build. A solid plan, honest timelines, and a deck that’s actually built to last through Ottawa winters.
Whether you’re in Kanata, Nepean, Barrhaven, or Orleans, we’re ready when you are.
Let’s get your project started.
