Quick answer#
A building permit is an authorization issued by a municipality before certain construction, renovation, demolition or change-of-use work begins.
The permit process allows the municipality to review drawings and project information for compliance with applicable bylaws, building-code requirements and life-safety standards.
Why building permits are required#
Building permits help confirm that proposed work has been reviewed before construction begins.
Permit review may address structural safety, fire protection, exiting, accessibility, plumbing, energy performance, zoning and other requirements that apply to the project.
Projects that commonly require a permit#
New buildings and additions.
Structural alterations.
Major residential or commercial renovations.
Secondary suites.
Changes to plumbing systems.
Changes in building use or occupancy.
Demolition and certain site-preparation work.
Projects affecting fire separations, exits or life-safety systems.
Work that may not require a building permit#
Some cosmetic work, such as painting, replacing finishes or installing similar cabinets, may not require a building permit.
However, separate electrical, plumbing, gas, development, heritage or business approvals may still be required. Requirements vary by municipality and project scope.
What is usually submitted#
A permit application form.
Site plans and floor plans.
Construction details.
Structural information when required.
Energy-code information.
Owner and contractor information.
Professional letters or sealed drawings when required.
What happens after submission#
The municipality reviews the application and may request corrections, clarification or additional documents.
After approval, inspections are commonly required at specific stages of construction. Final approval does not normally occur until the required inspections have been completed.
Common mistakes#
Starting construction before the permit is issued.
Assuming a small project never requires review.
Submitting incomplete drawings.
Ignoring zoning or change-of-use requirements.
Failing to book required inspections.
Changing the approved scope without notifying the municipality.
How PermitWave helps#
PermitWave helps property owners and project teams identify likely permit triggers, required documents and common approval risks before submission.
Early review can reduce missing information, redesign and avoidable delays.