Building permits in City of Hamilton
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
-
Structural changes
Load-bearing walls, foundations, additions
-
Plumbing installations or alterations
-
HVAC installations or alterations
-
Finishing a basement
When it adds habitable space
-
Decks above 600 mm
Higher than 24 inches above grade
-
Detached structures
Above the municipal size threshold
-
New window or door openings
In structural walls
-
Fireplace or wood stove installations
-
Underpinning
Lowering basement floors
-
Demolition
Of buildings or structures
Permit typically not required
-
Paint, flooring, non-structural drywall
-
Cabinet replacement
No plumbing or electrical changes
-
Re-roofing with the same material
No structural changes
-
Like-for-like window or door replacement
Within the same opening
-
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 Division before beginning work.
The City of Hamilton permit process
How to apply for a building permit through Building Division.
Where to apply
Fees, timing & contact
How to apply, step by step
-
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 Hamilton's Building Division at 905-546-2720.
-
2
Verify zoning compliance
Check your property's zoning using Hamilton's interactive zoning map. Confirm setbacks, lot coverage, and height limits before investing in architectural drawings.
-
3
Check for heritage designation
Look up your address on Hamilton's heritage registry. Hamilton has seven Heritage Conservation Districts including Durand-Markland, Westdale, and Ainslie Wood. If your property is designated or in an HCD, exterior changes need Heritage Planning approval.
-
4
Check Niagara Escarpment Commission jurisdiction
Use the NEC's interactive map to check if your property is within the Niagara Escarpment Plan Area. If so, you need a Development Permit from the NEC in addition to your municipal building permit.
-
5
Confirm Conservation Authority jurisdiction
Hamilton is covered by multiple Conservation Authorities: HCA for most areas, NPCA for Stoney Creek, and Conservation Halton for Flamborough. Contact the relevant CA if your property is near watercourses, wetlands, or flood plains.
-
6
Prepare your application package
Collect the required drawings for your project type: site plan, floor plans, structural drawings where required, and energy efficiency compliance (SB-12) for housing.
-
7
Submit through ePLANS
Create an account on Hamilton's ePLANS portal, submit your application and drawings, and pay the applicable fees. The Building Division pre-screens applications within 2 business days.
-
8
Book your inspections
Once your permit is issued, schedule inspections by calling 905-546-2424 ext. 7777 or emailing buildinginspections@hamilton.ca. Request next-day inspections before 3:00 pm.
Other approvals you might need
Beyond the municipal building permit, your project may trigger additional provincial or local approvals.
Common City of Hamilton renovation projects
Typical permit and approval requirements by project type. Individual projects can differ — always verify with Building Division.
| Project | Building | ESA | TSSA | Plumbing | Conservation | Heritage |
|---|---|---|---|---|---|---|
|
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.
|
If applicable | If applicable | No | No | If applicable | If applicable |
|
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.
|
Required | If applicable | No | If applicable | No | If applicable |
|
Addition (single-storey or second-storey)
Adding new habitable space to a home: bump-out, new room, second-storey addition, or sunroom conversion.
|
Required | Required | If applicable | If applicable | If applicable | If applicable |
|
Window or door replacement
Replacing an existing window or door, or creating a new opening in an exterior wall.
|
If applicable | No | No | No | No | If applicable |
|
Roof replacement (reroofing)
Replacing an existing roof with the same or different materials (shingle, metal, membrane).
|
If applicable | No | No | No | No | If applicable |
|
Furnace replacement
Replacing an existing furnace (gas or electric) with a comparable new unit.
|
If applicable | If applicable | If applicable | No | No | No |
|
Central air conditioning installation
Installing or replacing a central air conditioning system (split system with exterior condenser and interior coil).
|
If applicable | Required | No | No | No | No |
|
Gas fireplace installation
Installing a new gas fireplace, insert, or stove with associated venting and gas line.
|
Required | If applicable | Required | No | No | If applicable |
|
Swimming pool (inground)
Installing an inground swimming pool including excavation, shell, equipment pad, and required fencing.
|
Required | Required | If applicable | Required | If applicable | No |
|
Fence
Installing or replacing a residential fence along a property line.
|
Varies | No | No | No | If applicable | If applicable |
|
Detached garage or large shed
Building a detached accessory structure such as a garage, large shed, or workshop.
|
If applicable | If applicable | No | No | If applicable | If applicable |
|
Basement underpinning (lowering floors)
Lowering an existing basement floor by excavating and extending the foundation downward in sections.
|
Required | If applicable | No | If applicable | No | If applicable |
|
Solar panel installation
Installing a rooftop or ground-mount photovoltaic (PV) system with inverter and electrical interconnection.
|
Required | Required | No | No | No | If applicable |
|
Electric vehicle (EV) charger installation
Installing a Level 2 (240V) EV charging station in a garage, driveway, or parking area.
|
No | Required | No | No | No | No |
|
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 Hamilton pros who handle permits
Skip the guesswork. Connect with verified City of Hamilton professionals who understand the permit process and can quote the full scope of your project.
Get free quotesFrequently asked questions
When do I need a building permit in Hamilton?
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. Contact Hamilton's Building Division at 905-546-2720 to confirm.
How do I apply for a building permit in Hamilton?
Hamilton accepts online building permit applications through the ePLANS portal. You will need a site plan, floor plans, structural drawings (where required), and energy efficiency compliance documentation for housing. The minimum permit fee is $291.
How long does it take to get a building permit in Hamilton?
Hamilton has a 10 business day issuing policy for complete applications without outstanding issues. After submitting via ePLANS, the Building Division pre-screens applications within 2 business days to confirm completeness. Incomplete applications will require resubmission.
What is the Niagara Escarpment Commission and do I need their approval?
The Niagara Escarpment Commission (NEC) regulates development within the Niagara Escarpment Plan Area, which includes significant portions of Hamilton. If your property is in this area, you need a Development Permit from the NEC in addition to your municipal building permit. Use the NEC's interactive map to check if your property is affected.
Do I need Conservation Authority approval in Hamilton?
Hamilton is covered by three Conservation Authorities: HCA, NPCA, CH. If your property is in a regulated area (near watercourses, wetlands, flood plains, steep slopes, or the Lake Ontario shoreline), you may need their approval before the city can issue your building permit.
Is my Hamilton property in a Heritage Conservation District?
Hamilton has seven designated Heritage Conservation Districts: Durand-Markland, Hamilton Beach, MacNab-Charles, St. Clair Boulevard, Cross-Melville (Dundas), Ainslie Wood, and Westdale. If your property is individually designated or in an HCD, exterior alterations need Heritage Planning approval in addition to a building permit.
Do I need an ESA permit for electrical work in Hamilton?
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). This is separate from your municipal permit.
Do I need a TSSA permit for gas work in Hamilton?
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.
Last verified: