How deep does a Vancouver fence post footing go?

In Metro Vancouver, fence posts should be set a minimum of 600mm (2 feet) deep for a standard 6-foot privacy fence — and deeper is almost always better given the region's wet, soft soil conditions.

The general rule used by experienced fence contractors here is to bury at least one-third of the total post length below grade. So for a 6-foot fence using an 8-foot post, you're burying roughly 2 feet. For an 8-foot fence, you're looking at 2.5 to 3 feet minimum. Gate posts and corner posts — which carry significantly more load — should always go deeper than line posts, and should use 6x6 lumber rather than 4x4.

Why Metro Vancouver Demands More Than the Minimum

Vancouver's marine climate changes the math on post depth compared to drier parts of Canada. The region receives over 1,200mm of rain annually, and that moisture saturates the soil, reducing its ability to hold posts firmly. Soft, wet soil offers far less lateral resistance than the compacted or clay-heavy soils you'd find in drier climates. A post that would stand perfectly plumb for 20 years in Kelowna might start leaning within 3-5 years in a wet Burnaby backyard if it's set too shallow.

Wind load is the other critical factor. Solid cedar privacy fences act like sails in a windstorm, and Metro Vancouver — particularly the North Shore, elevated areas, and properties near the water — can see gusts of 80-100 km/h during winter storms. The deeper the post, the more soil is working to resist that lateral force. In exposed locations, contractors will often reduce post spacing from the standard 8 feet down to 6 feet, and increase footing depth to 2.5-3 feet, even for a standard 6-foot fence.

The Right Way to Set a Post in Metro Vancouver

Depth alone isn't enough — how the post is set matters just as much. The single best practice for Vancouver's wet climate is a gravel drainage bed at the base of every post hole. Pour 4-6 inches of clear crush gravel into the bottom of the hole before setting the post. This allows groundwater to drain away from the post base rather than pooling around it. Then fill with concrete, sloping the top of the concrete slightly away from the post so surface water sheds outward. This combination — proper depth plus gravel drainage — is what separates a fence that lasts 20 years from one that rots out in 8.

Use galvanized or stainless steel hardware throughout, and apply end-cut preservative to any cut post ends before setting them. In Metro Vancouver's climate, standard steel fasteners will rust and fail, and untreated cut ends are the first place rot takes hold.

Before you dig anything, call BC One Call at 1-800-474-6886 for a free utility locate. Buried gas lines, electrical cables, and water mains are common across Metro Vancouver's established neighbourhoods, and hitting one is both dangerous and expensive. This call is legally required in BC before any ground disturbance.

When to Hire a Pro

Post setting is the foundation of your entire fence — mistakes here are expensive to fix and often mean replacing the whole fence years earlier than you should. If you're doing a long run, setting gate posts, working on a slope, or dealing with rocky North Shore soil (which can require a jackhammer and adds $20-$50 per hole), a professional installer with the right equipment will get the depth and alignment right the first time.

Need help finding a fence contractor in Metro Vancouver? Vancouver Fence Builders can match you with a local professional for a free estimate — or browse the Vancouver Construction Network directory at vancouverconstructionnetwork.com/directory?trade=fencing.