Perimeter Drainage Cost in BC

Average cost

A new or replacement perimeter drainage system on a Lower Mainland detached home usually costs $12,000–$30,000, and more with membrane, sump or heavy restoration.

Cost per linear foot

Roughly $80–$200 per linear foot all-in, depending on depth, access and restoration.

Excavation costs

Digging to footing depth and hauling spoil is typically 40–60% of the cost.

Landscaping restoration

Hardscape and landscape restoration can add $2,000–$10,000+.

Accessibility

Tight side yards and obstructions force hand digging, especially in Vancouver and Burnaby.

Depth

Basement homes (4–8 ft) cost more per foot than crawl space homes (2–4 ft).

Permits

Most Lower Mainland municipalities (Vancouver, Burnaby, Surrey, Richmond and others) require a plumbing permit for perimeter drain replacement and any new storm connection. Permit and inspection fees typically add a few hundred dollars. Your contractor should pull the permit and hand you the final inspection sign-off.

System type

Perforated PVC or corrugated pipe in drain rock with filter fabric, cleanouts at corners, discharging to the storm system or a sump.

Partial vs full perimeter

One-side repairs cost $3,000–$9,000. Full perimeter is better value when the existing system is original and failing in several places.

Vancouver vs Fraser Valley considerations

Vancouver, Burnaby and New Westminster jobs tend to cost more: tight lot lines, shared side yards, mature trees, hand digging and higher disposal and parking costs. Fraser Valley jobs (Langley, Abbotsford, Chilliwack, Maple Ridge) usually have better machine access and lower disposal costs, but larger homes, longer runs and heavier clay can offset the savings. Low-lying Richmond and Delta often add dewatering and sump work.

Questions to ask contractors

1. Where will the system discharge?
2. How many cleanouts will be installed?
3. Is membrane included while walls are exposed?
4. What restoration and permits are included?
5. Will you provide camera footage of the finished system?

When perimeter drainage is actually necessary

A new perimeter system is necessary when the existing one has failed on multiple sides, is missing entirely, or the home has repeated below-grade water.

Learn more about perimeter drainage in the Lower Mainland.