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St. Thomas Building Permits

Building permit requirements, fees, department contacts, and application process for St. Thomas, Ontario.

St. Thomas, ON Ontario Town
Population
42,493
Town
Province
ON
Ontario
Permit Data
Coming
Data ingestion planned

Building Department

St. Thomas Building Department

Contact the St. Thomas municipal office to reach the building and permits department. Hours are typically Monday–Friday 8:30am–4:30pm. Many municipalities offer online permit applications through their official portal.

Search for St. Thomas Building Department →

Permit Application Process

1
Confirm Requirements
Contact the St. Thomas building department or visit their online portal to confirm whether your project requires a permit.
2
Prepare Your Application
Gather site plans, drawings, and project specifications. Many municipalities require signed drawings from a licensed designer for structural work.
3
Submit & Pay Fees
Submit your application in person or online. Fees are typically calculated based on the declared construction value.
4
Wait for Review
Review times vary by municipality and project complexity — typically 5–15 business days for residential permits.
5
Receive Permit & Post It
Once approved, post your permit on site where it's visible. Work must not begin until the permit is issued.
6
Schedule Inspections
Call the building department to book required inspections at each stage (framing, insulation, final).
For Homeowners
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Common Permit Types in St. Thomas

Permit Type
Kitchen Renovation Permit
Required for structural changes, electrical upgrades, or plumbing work in kitchen renovations.
May be required
Permit Type
Basement Finishing Permit
Required to finish or renovate a basement, including adding bedrooms, bathrooms, or living space.
May be required
Permit Type
Home Addition Permit
Required for any addition that increases the footprint or height of your home.
May be required
Permit Type
Deck & Patio Permit
Required for decks over 24" (60cm) above grade or attached to the house.
May be required
Permit Type
New Home Construction Permit
Required to build a new residential structure. Includes site plan, foundation, and framing inspections.
May be required
Permit Type
General Renovation Permit
Required for structural, electrical, plumbing, or HVAC work in existing dwellings.
May be required
Permit Type
Demolition Permit
Required before demolishing any structure. Utilities must be disconnected prior to approval.
May be required
Permit Type
HVAC & Mechanical Permit
Required for furnace replacement, AC installation, duct work, or ventilation changes.
May be required

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