Roofing Permits in Duncan & the Cowichan Valley

Four member municipalities sit within the region—the City of Duncan, North Cowichan, Lake Cowichan and Ladysmith—along with nine electoral areas managed by the CVRD.

Duncan is the complication. A great many homes with a Duncan mailing address are governed by North Cowichan, not the City. We check your property tax notice to confirm which municipal building department has authority over your roof.

North Cowichan's building permit rules exempt re-roofing unless we replace structural framing or upgrade insulation during the project.

Open up a Chemainus or Crofton roof and it's common to find soft sheathing underneath, and plenty of homeowners want the attic insulation upgraded while the deck is already exposed — sensible work that moves the job into permit territory either way. Neither is unusual, and neither is a reason to skip the work. It just means the permit conversation happens before the crew shows up, not after.

The City of Duncan does not publish a roofing-specific exemption list. Its building permits page directs homeowners to a 'Do I Need a Building Permit?' document and to the building inspector in Development Services, and notes that other approvals may be needed before a permit is issued depending on scope and zoning.

For a property inside the City of Duncan, we confirm the permit position with Development Services before we scope the work, because North Cowichan's exemption does not carry across the city boundary.

Properties outside the four member municipalities — the rural areas around Sahtlam, Glenora, Cowichan Bay, Shawnigan Lake and Cobble Hill among them — fall under CVRD building inspection. The CVRD manages building permits across rural electoral areas, so we verify permit requirements for your rural property before starting.

Rural properties also tend to raise questions a town lot does not: development permit areas near watercourses and steep slopes, and access for equipment. Those are separate from the building permit and worth raising in the same call to CVRD Building Inspection.

Four things commonly move a job across the line. Rotted sheathing that has to be replaced over more than a small area. A rafter or truss found damaged once the deck is open. Insulation replaced or upgraded as part of the work. And any change to the roof structure itself — a new dormer, a raised section, a skylight opening cut where none existed.

We discover damaged framing or soft sheathing after opening your roof, which is why our initial assessment includes a sheathing allowance. A roof with a long-running valley leak has a real chance of becoming permit work once opened, and it is better to know that while budgeting than mid-job.

We prepare and submit all building permit applications on your behalf whenever your roofing project requires municipal approval. When a permit applies, building inspectors inspect sheathing and structural framing before we install underlayment and shingles over them.

None of this is a reason to skip a permit. Unpermitted structural work surfaces at resale, in an insurance claim, or in a building department file, and it is far more expensive to resolve then. You can review installation pricing and project estimates in our roofing cost guide.

Municipal building inspectors check specific construction details to ensure your roof meets local building safety codes. During an inspection, the official verifies structural sheathing thickness and checks for proper nail spacing into roof rafters. They examine underlayment layers and verify self-adhering ice-and-water membrane coverage along eaves and valleys. Flashings around chimneys, step walls, and valley intersections are inspected for correct overlaps and water shedding design. The inspector evaluates attic ventilation capacity, checking that intake and exhaust vents balance properly to prevent moisture damage. Fastener types, shingle alignment, and drip edge placement are also reviewed. We pull any required permit for your project and prepare the site for inspection. Our team ensures all work meets or exceeds code requirements, giving you complete confidence in your installed roof system.

Pulling a permit adds structural inspection checkpoints that influence your overall project timeline. Before starting construction, permit applications must be submitted and reviewed by municipal authorities. Once approved, work proceeds according to scheduled inspection stages. On certain roofs, an inspector may need to examine structural wood sheathing after tear-off before new underlayment goes down. We coordinate inspection times directly with municipal inspectors to keep project delays to a minimum. Work on subsequent layers continues promptly as soon as the inspector signs off on underlying stages. We pull any required permit for your home and integrate inspection timing into our weather-scheduling strategy. Planning around permit steps ensures your roofing project remains fully compliant with local standards while keeping your home dry and secure on your street.