Can one rotten Vancouver fence post be replaced alone?

Yes, a single rotten fence post can be replaced without tearing down the entire fence — and it's one of the most cost-effective repairs you can make to extend the life of an otherwise sound structure.

The key is catching the rot early. If the post is soft and crumbling at or below grade but the rails and boards attached to it are still solid, you're in good shape. A contractor can remove just that post, extract or cut out the old concrete footing, set a new post, and reattach the existing fence sections. Expect to pay $150–$400 per post for professional replacement in Metro Vancouver, depending on how difficult the old footing is to remove and the post size required.

Why Post Rot Happens So Fast in Metro Vancouver

Vancouver's marine climate — over 1,200mm of rainfall annually — makes post bases the most vulnerable point of any wood fence. Water pools at grade level, saturates the soil around the post, and sits against the wood continuously through the long wet season from October to March. Even Western Red Cedar, which is naturally rot-resistant, will fail at the base within 8–12 years if the original installation didn't include a proper gravel drainage bed below the post. Pressure-treated posts without drainage gravel can fail even faster because the chemical treatment resists rot but doesn't prevent water from pooling and softening the wood fibres over time.

When you're assessing the post, probe the base with a screwdriver. If it sinks in easily at or just below grade, the post needs replacing. If the rot only affects the surface a centimetre or two deep and the core is still firm, the post may have more life left — though it's worth monitoring closely.

What the Replacement Process Looks Like

The most labour-intensive part of a single post replacement is removing the old concrete footing. In Metro Vancouver, posts are typically set in concrete that extends 2–2.5 feet below grade for a standard 6 ft fence. Extracting that footing requires digging around it, breaking it up, and pulling it out — or drilling through it to set a new post alongside. Some contractors use a post puller tool that can extract the post and footing together in one piece, which is faster and cleaner.

Once the old footing is out, the new post goes in with 4–6 inches of drainage gravel at the base, followed by concrete to within a few inches of grade. This gravel drainage bed is non-negotiable in Metro Vancouver's wet soil — it's what the original installer likely skipped, which is why you're replacing the post now. Use a 4x4 cedar or pressure-treated post for standard fences, or a 6x6 for gate posts and wind-exposed locations on the North Shore or near the water. Apply end-cut preservative to the buried end before setting.

DIY vs. Hiring a Pro

Replacing a single post is technically within reach for a capable DIYer with the right tools — a post hole digger or auger, a level, concrete mix, and some patience. The challenge is the old footing removal, which often requires a breaker bar, digging bar, or even a rented electric jackhammer if the concrete is substantial. Reattaching the existing rails and boards without cracking or splitting them also takes some care.

If the post is a gate post, hire a professional. Gate posts carry significantly more load and stress than line posts, and improper setting will result in a sagging, dragging gate within a season. The same applies if you're on a sloped lot or if the surrounding fence sections need realignment once the new post is in.

Before any digging, call BC One Call at 1-800-474-6886 for a free utility locate. It's legally required in BC and takes only a day or two to arrange. Hitting a buried gas or electrical line while digging a post hole is a serious hazard.

If you'd rather leave it to someone experienced, Vancouver Fence Builders can match you with a local fence contractor for a free estimate — find professionals through the Vancouver Construction Network at vancouverconstructionnetwork.com.