Fence Post Repair vs Replacement: Options and Costs

The Fence Is Fine, the Posts Are Not

Nine out of ten leaning fences we visit in Oakville, Burlington and the surrounding area tell the same story. The boards are solid, the rails are sound, and one or two posts have failed at ground level. You do not always need a new fence. Often you do not even need a new post. Here is how we decide on site, and what each fix really costs in 2026.

Why Posts Fail in Ontario

• Rot at the ground line. Wood stays wettest right where soil, snow and air meet. Even pressure-treated posts rot there first, years before the rest of the fence shows trouble.
• Frost heave. Ontario frost can push about 4 feet (1.2 m) into the soil. That is why Ontario's Building Code puts foundations below the frost line. A footing set too shallow gets lifted a little every winter until the post leans.
• Wind load. A 6 foot privacy fence is a sail. Storms rock a loose post back and forth until the concrete socket opens up around it.

Repair Options and Real Costs

When the post is still sound above grade, repair is quick and affordable. Fence repairs in our area start at about $130. The three fixes we use most, priced per post:

• Brace or sister post, about $130 to $250. We bolt a new support alongside the weak post. Best for a lean where the wood has not rotted through.
• Steel repair spur, about $150 to $300. A steel bracket drives into the existing footing and clamps the post above the rot. Good when the base is gone but the upper post is solid.
• Reset in new concrete, about $200 to $350. We pull the post, dig below frost depth, and set it again properly. This is the cure for heaved or loose footings.

When the Post Has to Go

Repair only works if there is solid wood left to hold. Replace the post when:

• A screwdriver sinks in at ground level. That is rot, and it only spreads.
• The post has snapped or wiggles like a loose tooth in its footing.
• The old footing is cracked or was never deep enough in the first place.

Expect about $200 to $400 per post replaced, including breaking out the old concrete, digging below the frost line, and refastening rails and boards. Resetting or replacing two or three posts usually lands in the hundreds, not the thousands, so it beats a new fence by a wide margin.

How Many Bad Posts Kill a Fence?

Our rule from years of site visits: if more than a quarter of the posts are failing, or the fence is 15 to 20 years old and moves in the wind, put the money into replacement instead. Rot rarely stops at the posts you can see. The full checklist is in our guide on fence repair or replacement, and current build prices are in our Ontario fence cost guide.

Get a Straight Answer on Your Posts

We check every post, not just the leaning one, and tell you plainly which fix fits. Read about our fence repair and restoration service, run your numbers through the online cost calculator, or book a free estimate today. A post fixed this season is a fence saved for the next ten years.