Building permits in City of Ottawa
A complete guide for homeowners.
Understand what permits you need, how to apply, and which other approvals may apply to your renovation project.
When do you need a building permit?
Under the Ontario Building Code, municipal building permits are required for most structural, plumbing, HVAC, and electrical work.
Permit usually required
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Structural changes
Load-bearing walls, foundations, additions
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Plumbing installations or alterations
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HVAC installations or alterations
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Finishing a basement
When it adds habitable space
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Decks above 600 mm
Higher than 24 inches above grade
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Detached structures
Above the municipal size threshold
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New window or door openings
In structural walls
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Fireplace or wood stove installations
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Underpinning
Lowering basement floors
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Demolition
Of buildings or structures
Permit typically not required
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Paint, flooring, non-structural drywall
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Cabinet replacement
No plumbing or electrical changes
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Re-roofing with the same material
No structural changes
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Like-for-like window or door replacement
Within the same opening
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Minor landscaping
That does not alter drainage or grading
Always verify before you start
Exemptions can vary by municipality and project scope. Confirm with Building Code Services before beginning work.
The City of Ottawa permit process
How to apply for a building permit through Building Code Services.
Where to apply
Fees, timing & contact
How to apply, step by step
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1
Confirm whether a permit is required
Review the Ontario Building Code permit triggers and check this guide for your specific project type. When in doubt, contact Ottawa's Building Code Services through 3-1-1.
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2
Verify zoning compliance
Check your property's zoning using the geoOttawa map viewer. Confirm setbacks, lot coverage, and height limits before investing in architectural drawings.
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3
Check for heritage designation
Look up your address against Ottawa's heritage registry. If your property is designated or located in a Heritage Conservation District, exterior changes need Built Heritage Committee review.
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4
Confirm Conservation Authority jurisdiction
If your property is near a watercourse, wetland, or flood plain, contact the relevant Conservation Authority (RVCA, MVCA, or SNC) before applying for a building permit.
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5
Prepare your application package
Collect the typical drawings for your project type: site plan, floor plans, structural drawings where required, and energy efficiency compliance (SB-12) for housing.
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6
Submit through My ServiceOttawa
Submit your application and drawings through Ottawa's My ServiceOttawa Building Permit Portal. Fees are calculated based on construction value and area.
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7
Book your inspections
Once your permit is issued, book inspections through 3-1-1 or the My ServiceOttawa portal at the construction stages required by your permit.
Other approvals you might need
Beyond the municipal building permit, your project may trigger additional provincial or local approvals.
Common City of Ottawa renovation projects
Typical permit and approval requirements by project type. Individual projects can differ — always verify with Building Code Services.
| Project | Building | ESA | TSSA | Plumbing | Conservation | Heritage |
|---|---|---|---|---|---|---|
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Basement finishing
Converting an unfinished basement into habitable living space (new walls, ceilings, flooring, and typically new electrical and sometimes plumbing).
|
Required | Required | If applicable | If applicable | No | No |
|
Kitchen renovation
Cabinet replacement, countertop swap, and appliance changes with potential plumbing, electrical, or gas modifications.
|
If applicable | If applicable | If applicable | If applicable | No | No |
|
Bathroom addition
Adding a new bathroom (typically in a basement or converted space) requiring new plumbing drains, vents, and fixtures.
|
Required | Required | No | Required | No | No |
|
Deck (residential)
Building or replacing an exterior deck attached to a house or freestanding.
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If applicable | If applicable | No | No | If applicable | If applicable |
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Load-bearing wall removal
Removing an interior load-bearing wall (e.g., to open a kitchen to a living area) and installing a beam or header.
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Required | If applicable | No | If applicable | No | If applicable |
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Addition (single-storey or second-storey)
Adding new habitable space to a home: bump-out, new room, second-storey addition, or sunroom conversion.
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Required | Required | If applicable | If applicable | If applicable | If applicable |
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Window or door replacement
Replacing an existing window or door, or creating a new opening in an exterior wall.
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If applicable | No | No | No | No | If applicable |
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Roof replacement (reroofing)
Replacing an existing roof with the same or different materials (shingle, metal, membrane).
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If applicable | No | No | No | No | If applicable |
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Furnace replacement
Replacing an existing furnace (gas or electric) with a comparable new unit.
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If applicable | If applicable | If applicable | No | No | No |
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Central air conditioning installation
Installing or replacing a central air conditioning system (split system with exterior condenser and interior coil).
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If applicable | Required | No | No | No | No |
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Gas fireplace installation
Installing a new gas fireplace, insert, or stove with associated venting and gas line.
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Required | If applicable | Required | No | No | If applicable |
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Swimming pool (inground)
Installing an inground swimming pool including excavation, shell, equipment pad, and required fencing.
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Required | Required | If applicable | Required | If applicable | No |
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Fence
Installing or replacing a residential fence along a property line.
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Varies | No | No | No | If applicable | If applicable |
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Detached garage or large shed
Building a detached accessory structure such as a garage, large shed, or workshop.
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If applicable | If applicable | No | No | If applicable | If applicable |
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Basement underpinning (lowering floors)
Lowering an existing basement floor by excavating and extending the foundation downward in sections.
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Required | If applicable | No | If applicable | No | If applicable |
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Solar panel installation
Installing a rooftop or ground-mount photovoltaic (PV) system with inverter and electrical interconnection.
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Required | Required | No | No | No | If applicable |
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Electric vehicle (EV) charger installation
Installing a Level 2 (240V) EV charging station in a garage, driveway, or parking area.
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No | Required | No | No | No | No |
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Demolition
Demolishing a building or a significant portion of a building (garage, accessory structure, interior gut).
|
Required | Required | Required | Required | If applicable | If applicable |
Get quotes from City of Ottawa pros who handle permits
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Get free quotesFrequently asked questions
When do I need a building permit in Ottawa?
Under the Ontario Building Code, a permit is typically required for structural changes, additions, finished basements that add habitable space, decks more than 600 mm above grade, new plumbing, HVAC installations, and demolitions. Cosmetic changes like paint, flooring, and like-for-like fixture replacements generally do not. Always verify with Ottawa's Building Code Services before starting work.
How do I apply for a building permit in Ottawa?
Ottawa accepts online building permit applications through the My ServiceOttawa Building Permit Portal. You will need a site plan, floor plans, structural drawings (where required), and energy efficiency compliance documentation for housing. Fees are based on construction value and area.
How long does it take to get a building permit in Ottawa?
Statutory review timelines under the Ontario Building Code are 10 business days for houses, 15 days for small buildings, 20 days for large buildings, and 30 days for complex buildings. Actual processing time depends on application completeness and current city workload.
Do I need Conservation Authority approval in Ottawa?
Ottawa is covered by three Conservation Authorities: RVCA, MVCA, SNC. If your property is within a regulated area (near a watercourse, wetland, or flood plain), you may need their approval before the city can issue your building permit. Check with the relevant Conservation Authority early in your planning.
Is my Ottawa property in a Heritage Conservation District?
Ottawa has multiple designated Heritage Conservation Districts, including Centretown, Sandy Hill West, Lowertown West, New Edinburgh, and Rockcliffe Park. If your property is individually designated or located in an HCD, exterior alterations and additions typically need Built Heritage Committee approval in addition to a building permit.
What is a minor variance and when do I need one?
A minor variance is an exception from a zoning bylaw rule (such as a setback or lot coverage limit) granted by Ottawa's Committee of Adjustment. If your project meets building code but does not comply with the zoning bylaw, you will need to apply for a minor variance before the city can issue your building permit.
Do I need an ESA permit for electrical work in Ottawa?
Yes. The Electrical Safety Authority (ESA) requires a notification for all electrical work in Ontario, regardless of municipality. Homeowners can file ESA notifications for work on their own home, or hire a Licensed Electrical Contractor (LEC) to do the work and file on their behalf. This is separate from your municipal building permit and is filed directly with ESA.
Do I need a TSSA permit for gas work in Ottawa?
Gas work (furnaces, gas fireplaces, gas lines, BBQ hookups) must be performed by a TSSA-certified gas technician with G1 or G2 certification. TSSA-certified contractors handle the regulatory notification and inspection process for you.
Important disclaimers
- This information is for general guidance only and does not constitute legal or professional advice.
- Permit requirements vary by municipality and project. Always confirm with your local building department.
- Information is current as of the date shown. Municipal requirements change - verify before relying on this information.
- RealCraft is not affiliated with any municipal, provincial, or federal government body.
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