Do You Need a Permit for a 100 Sq Ft Bump-Out in Burnaby?

Yes, you need a building permit for a 100 square foot bump-out in Burnaby — there is no minimum size threshold that exempts structural additions from permitting. The City of Burnaby, like every municipality in Metro Vancouver, requires a building permit for any construction that changes the structural footprint of your home, regardless of how small the addition may be. Even a modest 10-by-10-foot kitchen extension triggers the full permit process.

This catches many homeowners off guard because they assume small projects fly under the radar. The BC Building Code and Burnaby's bylaws are clear: any work that involves cutting into exterior walls, extending the foundation, modifying the building envelope, or adding habitable floor area requires a permit. A 100 square foot bump-out checks every one of those boxes. You are extending the foundation (even if it is a simple slab or crawlspace), cutting through the exterior wall to connect the new space, adding new roof structure, and creating additional living area that must meet insulation, ventilation, and egress requirements.

Burnaby does have a short list of projects that are permit-exempt, but these are limited to things like small detached sheds under 10 square metres (about 107 square feet) that are not attached to the house, certain fences, retaining walls under a specific height, and minor interior cosmetic renovations that do not affect structure, plumbing, or electrical. The key distinction is "detached accessory structure" versus "addition to the dwelling." Your bump-out is physically attached to and integrated with the existing house, so the detached-shed exemption does not apply even though the square footage is similar.

The permit application for a bump-out in Burnaby typically requires architectural drawings showing the proposed addition in plan view and section, a site plan demonstrating compliance with setback requirements, structural engineering details for the new foundation and roof tie-in, and confirmation that lot coverage limits are not exceeded. Burnaby's planning department will check that the bump-out respects the required side-yard and rear-yard setbacks under the applicable zoning district. For most RS-zoned single-family lots, you need a minimum 1.5 metre side setback and 6 metre rear setback, though this varies by zone.

From a cost perspective, the permit fee for a 100 square foot bump-out in Burnaby is relatively modest — typically $300 to $600 depending on the declared construction value. The bigger expense is the professional drawings and engineering you will need to submit. Expect to pay $2,000 to $4,000 for architectural plans and $1,500 to $3,000 for structural engineering on a small bump-out. These professional fees often surprise homeowners who assumed a "small" project would be simple paperwork.

The permit timeline in Burnaby for a straightforward bump-out runs approximately 6 to 10 weeks from submission to approval, assuming there are no zoning variances needed and your drawings are complete. If the bump-out encroaches into a required setback or pushes your lot coverage over the limit, you will need a development variance permit on top of the building permit, which adds significant time — potentially three to six months for the public notification and council approval process.

Building without a permit is never worth the risk. If Burnaby's building inspection department discovers unpermitted work, you face stop-work orders, fines of up to $1,000 per day of violation, and the possibility of being ordered to demolish the addition. Even if the work is never caught during construction, unpermitted additions create serious problems when you sell the home, refinance, or file an insurance claim. Title searches and home inspections routinely flag additions that do not match the original building plans on file with the city, and your insurance company can deny a claim on an unpermitted structure.

The bottom line is straightforward: budget for the permit, hire professionals to prepare proper drawings, and build it right. A 100 square foot bump-out is a meaningful structural modification to your home, and the permit process exists to ensure it is safe, properly engineered for Metro Vancouver's seismic zone, and compliant with the BC Building Code's requirements for energy efficiency, fire safety, and structural integrity.

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