Permit vs No Permit
Real Consequences in Ottawa

Work done without a building permit in Ottawa can still be permitted afterwards, and the City charges for the delay. When construction starts before a permit is issued, its fee schedule effective 2026-01-01 adds an administrative surcharge of 50% of the permit fee, up to $10,000.

The application is an ordinary one with drawings of what was built, and the inspector can ask for finished walls to be opened.

The pitch sounds reasonable on a Tuesday afternoon. Your contractor says, "We can save you the permit fee, do the work in two weeks instead of two months, and the City will never know." Maybe they show you a previous job they did the same way. Maybe they offer to knock a little off the quote if you skip the paperwork.

What that pitch leaves out: the four ways the missing permit catches you later. We see all four every month in Ottawa. Each is more expensive than the original permit fee by a factor of 5 to 50.

Consequence 1: The Sale That Falls Apart

This is the most common, and the most painful. You renovated your basement six years ago without a permit. Now you are selling. The house lists, gets a strong offer with conditions. The standard Ontario Real Estate Association (OREA) Schedule includes a clause requiring the seller to warrant that all work was done with permits where required.

The buyer's lawyer pulls a property file from the City of Ottawa as part of due diligence. The City file shows: original permit for the house in 1978, no permits since. Your basement is finished, with a bathroom, with a kitchenette. None of it on file.

The buyer's lawyer sends a letter requiring you to either:

• Pull a retroactive permit and pass inspection before closing, or
• Provide a substantial price reduction, often tens of thousands of dollars

Retroactive permits in Ottawa carry a 2x penalty fee over the original City permit. That doubled City fee is the small cost. The big cost is opening walls so an inspector can see what is behind the drywall: framing, vapour barrier, fire separation, electrical, plumbing. If anything fails (and on unpermitted work, plenty fails), you redo it before the inspection passes.

Updated 2026-10-05: the City of Ottawa's Building Code Services Fee Schedule, effective 2026-01-01, sets the charge for work started before a permit as an administrative surcharge of 50% of the permit fee, to a maximum of $10,000.

We have helped homeowners go through this. The remediation work on a 6-year-old basement, opening, fixing, closing, and re-finishing, routinely runs into the tens of thousands of dollars on top of the retroactive permit fees. Closing slips by 4 to 10 weeks, which often kills the deal entirely.

Consequence 2: The Insurance Claim That Gets Denied

Every Ontario home insurance policy has a "material misrepresentation" clause. If the insurer relied on a particular fact in writing the policy and that fact was false, the policy can be void from inception.

The fact insurers care about: the configuration of the home as represented at policy renewal. If you told them you have a 3-bedroom single-family home and your basement is actually a separate rental suite, you have misrepresented.

What this looks like in practice: a kitchen fire. The fire is small, contained to the kitchen, but tens of thousands in damage. Insurer adjuster arrives, looks around, notes the basement has an external entrance, a stove, a separate bathroom, and a tenant who calls it home. Adjuster goes back to the office, pulls the City permit history, finds nothing.

The insurer's position: "You did not disclose this is a multi-unit dwelling. Coverage is voided. We are denying the claim and refunding your premiums for the past year. You can pursue us in court if you disagree."

This is not a theoretical risk. Insurance Bureau of Canada data and Ontario court cases include multiple examples of denied claims where unpermitted secondary suites or unpermitted additions were the basis of the denial. The homeowner ate the entire kitchen-fire loss personally.

Consequence 3: The Neighbour Complaint That Triggers an Audit

Ottawa Bylaw Services responds to complaints. The complaint can come from anyone: a neighbour annoyed by construction noise, a competing contractor, a tenant evicted from a basement suite, an ex-spouse during a divorce. We have seen all of these.

The complaint goes through an Ottawa 311 ticket and lands with a Property Standards Officer or a Building Inspector. The officer drives by, sees evidence of work (a dumpster, materials on the lawn, a new dormer), and pulls the permit history. If no permit, the officer:

1. Knocks on the door
2. Asks to see the inside of the work
3. If refused entry, returns with an inspection warrant under Section 12 of the Building Code Act
4. Issues an Order to Comply listing the violations and a deadline (typically 30 days)
5. Posts a Stop Work Order if work is in progress

An Order to Comply requires you to either:

• Pull a retroactive permit and pass inspection, or
• Restore the property to the pre-work condition (rip everything out)

Failure to comply within the deadline triggers fines under Section 36 of the Building Code Act: up to $50,000 for a first offence individual, $100,000 for a corporation, plus daily fines of up to $10,000 for continuing offences. Most homeowners settle long before maximums; typical Ottawa Provincial Offences fines we see for unpermitted work range from $750 to $5,000 plus the retroactive permit costs.

Consequence 4: The Retroactive Permit That Reveals Worse Problems

Sometimes you decide to do the right thing voluntarily and pull a retroactive permit. The City accepts retroactive applications. Their process:

1. You submit drawings showing what was built
2. You pay the 2x permit fee
3. An inspector visits and decides what walls and ceilings need to be opened to verify what is behind
4. You open them
5. The inspector inspects the bones
6. You fix what fails
7. You close and finish

What gets found behind unpermitted walls in Ottawa, in our experience:

• Studs spaced 24" o.c. on a load-bearing wall (Code requires 16" o.c. for many configurations)
• Engineered beam pocket without proper bearing or hangers
• Insulation without vapour barrier on the warm side
• Romex stapled to the bottom of joists where it can be hit by a screw later
• Plumbing waste line at less than 1/4" per foot slope
• Dryer vent dumping into the attic instead of outside
• Bathroom fan vented into a soffit, not above the roof
• Knob-and-tube buried in fresh insulation (fire risk)
• Fire-blocking missing in walls running balloon-style multiple storeys
• Furnace combustion air intake blocked or below grade

Each of these is a serious fix on its own. Stack several together and a retroactive basement remediation in Ottawa runs into the tens of thousands of dollars on top of the original "savings" from skipping the permit.

"The cheapest permit is the one you pull before the work starts. The second cheapest is the one you pull within a year of finishing. After that, the price doubles every couple of years."

The Math, Plainly

Take a typical Ottawa basement legalization. Doing it with permits, the permit cost is modest and known up front:

• City building permit
• ESA electrical permit
• TSSA gas permit (if a fireplace is involved)
• Plumbing permit (included in the building permit or pulled separately)
• Total permits: a small, predictable line on a written estimate

Doing it without permits, and getting caught at sale 5 years later, the costs pile up in a different column entirely:

• Retroactive building permit at the City's 2x penalty
• Retroactive ESA and TSSA permits
• Opening walls for inspection
• Fixing what fails (often a meaningful share of the original work)
• Closing and re-finishing everything that was opened
• Carrying costs while the closing slips
• The buyer price reduction often demanded at the table
• Total: many multiples of what the permits would have cost

A modest, predictable permit cost up front turns into a major, unpredictable hit later. We have seen this exact arc more times than we can count, which is why we permit every job that needs it.

How to Check a House's Permit History in Ottawa

Two City records answer the question before a buyer's lawyer asks it. Both prices below come from the City's fee schedule effective 2026-01-01.

A Compliance Summary Report, ordered through My ServiceOttawa or at a Building Code Services counter, lists the building permits issued on file, whether occupancy permits and final inspections were completed, and any outstanding orders or complaints under the Ontario Building Code, the Zoning By-law or the Property Standards By-law.

The City says these reports are typically requested before a sale or a refinancing. For a house with four units or fewer it costs $140, and the form asks for the existing use, including the number of units and storeys.

An application for access to building permit records, $88 plus reproduction costs, gets the drawings and permits themselves. Comparing those drawings with the house as it stands today shows which basement, deck or addition never went through the City.

If the records show gaps, the fix is an ordinary City of Ottawa building permit application for the work as built, followed by inspections, with the 50% surcharge on top of the permit fee.

The One Time No-Permit Was the Right Call

Some work genuinely does not need a permit:

• Painting
• Replacing flooring with the same type
• Replacing kitchen cabinets without moving plumbing or electrical
• Replacing windows with the same size opening (most cases)
• Replacing siding
• Re-roofing
• Replacing a deck of the same footprint at the same height (under 600mm above grade)
• Replacing a fence under 2.1m

If your contractor is doing only this scope, they are right that no permit is needed. The trouble starts when "kitchen renovation without moving anything" turns into moving a sink, which is plumbing, which needs a permit.

What the City of Ottawa Exempts

The City publishes its own list of projects that need no building permit, and it differs from the list above in places. It exempts:

• installing asphalt shingles on a roof
• damp proofing an existing basement
• replacing doors or windows in the same size opening
• replacing kitchen or bathroom cabinets, as long as the plumbing fixtures stay where they are
• new flooring
• air conditioners, heat pumps, pool heaters and a replacement hot water tank
• fences, except one that encloses a pool
• painting, decorating and landscaping
• a deck less than 24 inches above grade, unless it serves the main entrance
• a detached accessory structure under 10 square metres, or a one-storey storage shed of 15 square metres or less with no plumbing

Two conditions come with the list. Exempt work still has to meet the Building Code and the Zoning By-law. And designated heritage buildings, or buildings in a Heritage District Overlay, get no exemptions at all.

What You Should Actually Do

1. Before signing any contract, ask: "Will you pull all required permits in your name, or in mine if homeowner permits apply?" If the answer is anything other than yes, walk away.
2. Insist that the permit number appears in the contract.
3. Insist that the contractor will not proceed past rough-in without inspection sign-off.
4. Keep every permit document, inspection record, and certificate permanently.
5. If you bought a house with unpermitted work, address it now, not at sale.

If you have inherited unpermitted work or you are partway through a project that should be permitted, our building permits service can run the retroactive application: drawings, structural review, inspection coordination, and remediation scoping. The earlier you address it, the smaller the bill.

Call 613-862-4555 for a free 48-hour assessment of where you stand and what it would cost to make a quiet problem disappear before it becomes a loud one.

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