If you’re planning a renovation or addition in the Cowichan Valley or Greater Victoria area, this guide walks you through what permits are required, how the process works in BC, and what happens when things go sideways.

Why Building Permits Exist in the First Place

Building permits aren’t a revenue grab by local government. They exist because construction that goes wrong — faulty wiring, improper structural changes, non-compliant plumbing — creates genuine risk for the people living in the home and anyone who buys it later.

A permit creates a documented chain of accountability. A qualified inspector reviews the proposed work and verifies construction at critical stages before it’s covered up. If something is done incorrectly, the inspection process catches it while there’s still time to fix it.

For homeowners, permits are also financial protection. Unpermitted work can void your insurance coverage for a related claim, trigger costly disclosure requirements at sale, or cause a deal to collapse when a buyer’s inspector flags the work. The permit process is not bureaucratic friction — it’s the backstop between you and a very expensive problem.

What Requires a Building Permit in BC?

Under the BC Building Code and local municipal bylaws, a building permit is required for most work that affects the structure, envelope, or mechanical systems of a home. In the Cowichan Valley Regional District and surrounding municipalities, the following types of work almost always require a permit:

• Structural additions — any expansion of your home’s footprint or height
• Deck construction — any deck attached to the home, and most freestanding decks above a certain height
• Garage and carport construction — attached or detached
• Secondary suites and garden suites — including converting existing basement space
• Interior structural changes — removing or modifying load-bearing walls
• Electrical work — including panel upgrades, new circuits, and EV charger installations
• Plumbing changes — moving, adding, or replacing drain lines, water supply, or gas lines
• Mechanical systems — new or replacement HVAC, forced air, or heat pump installations
• Roofing — in many jurisdictions, significant re-roofing or structural changes to the roof assembly
• Window and door replacements — if they change the size of the opening

Cosmetic work — painting, flooring, cabinet replacements — is generally exempt, as long as it doesn’t touch structural, electrical, or plumbing systems. When in doubt, a quick call to your local building department is far cheaper than pulling unpermitted work apart later.

Who Issues Permits in the Cowichan Valley?

This is where it gets slightly more complicated, because jurisdiction depends on where your property sits.

Cowichan Valley Regional District (CVRD): Properties in unincorporated areas of the CVRD apply through the CVRD Building Inspection department. This covers a significant portion of the rural Cowichan Valley, including areas around Shawnigan Lake, Cobble Hill, Cowichan Bay, and parts of the Cowichan Lake area.

City of Duncan: Properties within Duncan city limits apply through the City of Duncan’s building and development services office.

Town of Lake Cowichan: The Town of Lake Cowichan handles permits for properties within its municipal boundary.

Municipality of North Cowichan: The Municipality of North Cowichan — which includes Chemainus, Crofton, and parts of the Cowichan Valley near Duncan — has its own building department.

Greater Victoria: For projects in Victoria, Saanich, Oak Bay, Langford, Colwood, and other Capital Regional District municipalities, permits are issued by each respective municipality.

Your general contractor should know exactly which authority governs your property and manage the permit application on your behalf.

How the Permit Application Process Works

A building permit application is more than a form — it’s a package of documents that tells the building authority exactly what you’re proposing to build and how. What’s required varies by project scope, but for a typical renovation or addition, expect to submit:

• A site plan showing your property boundaries, existing structures, and the location of proposed new construction. This is used to verify setbacks and lot coverage compliance under local zoning bylaws.
• Architectural drawings that include floor plans, elevations, and cross-sections of the proposed work. These need to be drawn to scale and sufficiently detailed for a reviewer to assess code compliance. For smaller projects, these may be prepared by your contractor. For larger additions or new builds, a designer or architect is typically required.
• Structural drawings for work involving new foundations, load-bearing changes, or significant framing are often prepared and stamped by a structural engineer.
• BC Energy Step Code documentation for projects that add conditioned floor area, confirming the work meets BC’s minimum energy performance requirements.

Once submitted, the building department reviews for completeness and code compliance. CVRD timelines typically run two to six weeks for standard residential projects. An incomplete application restarts the clock — which is exactly why having an experienced contractor manage this process matters.

When approved, the permit is issued, and construction can begin. The permit must be posted visibly on-site throughout the project.

Inspections: What They Are and When They Happen

A permit without inspections is just paperwork. The inspection process is what gives the permit its teeth.

Building inspectors visit at defined stages to verify that the work matches approved drawings and meets code. For a typical project, stages include:

• Footing and foundation — before concrete is poured
• Framing — after framing is complete, but before insulation or drywall covers it
• Rough-in trades — electrical, plumbing, and mechanical rough-ins- are inspected before walls are closed
• Insulation and vapour barrier — prior to drywall installation
• Final inspection — once construction is complete and the space is ready for occupancy

Your contractor is responsible for scheduling inspections at the right time. Work cannot proceed past an inspection stage until the previous stage is signed off on. If you’re managing a project and notice that your contractor is boarding up walls without having had a rough-in inspection, stop and ask why. This is not a minor procedural issue — it means work cannot be properly verified.

The final inspection is your official confirmation that the work is complete, code-compliant, and safe. No final inspection means no occupancy sign-off, which means — legally — the space isn’t approved for use.

What Happens If You Skip the Permit

Homeowners sometimes skip permits because a contractor says it’s unnecessary, or to save time and money. It’s a decision that almost always costs more than it saves.

Unpermitted work creates several overlapping problems:

Insurance liability. If a fire or structural failure involves work that was done without a permit, your insurer may deny the claim on the basis that the work was non-compliant.

Sale complications. Real estate disclosure laws in BC require sellers to disclose known unpermitted work. Even work you weren’t aware of can surface in a home inspection or title search and derail a sale.

Forced removal. In serious cases, a building authority can order unpermitted work torn out and redone properly — at your expense, and on their timeline.

Future permit problems. When you eventually try to pull a permit for other work on the property, existing unpermitted construction can complicate or block the application.

The right contractor doesn’t give you a choice between “faster with no permit” and “slower with a permit.” A reputable builder pulls the permit as a matter of professional practice — because they’re accountable for the work they produce, and because they understand that protecting you is part of the job.

Working With a Contractor Who Knows the Process

Permit management is one of the clearest ways to distinguish a professional, accountable contractor from one who’s cutting corners. A builder with decades of experience in the Cowichan Valley knows the local building departments, understands what reviewers look for, and can anticipate the questions that might delay approval.

They know how to schedule inspections efficiently, maintain the required documentation, and respond when a reviewer requests revisions. That institutional knowledge comes from years of doing the work properly.

When you hire a contractor who handles permitting as a matter of standard practice, you’re not just getting a builder — you’re getting someone accountable to the same system that protects you.

Frequently Asked Questions