How to Fix a Leaning Fence Post

A tilting post rarely straightens itself. Find out whether the problem is rot, loose soil or a cracked footing, then pick the repair that matches the cause.

Nov 8, 2026 · 4 min

The morning after a stormy night, one section of fence is no longer quite where it was. The top rail dips, a panel has twisted slightly, and one post leans towards the neighbour's garden at an angle that is easy to miss until you stand at the end of the run and look along it. Left alone, that lean almost always gets worse. Each gust pushes on the panels like a sail, and the post that has already given way a little gives way a little more.

The fix depends entirely on why the post moved, so the first job is a short investigation rather than a bag of concrete.

Work out the cause first

Grip the post at chest height and rock it gently. Then look closely at where it meets the ground and press a screwdriver into the wood just below and above the soil line.

The wood is soft or crumbles at ground level. The post has rotted. This is the most common cause with timber posts, because the zone just above and below the soil stays damp for long periods.
The post is solid but the whole footing moves. The soil around it is loose, washed out or waterlogged, or the concrete collar has cracked away from the surrounding ground.
The post moves inside its concrete. The wood has shrunk or rotted inside the collar, leaving a gap.
Only a gate post leans. The weight of the gate swinging on it every day has slowly levered it over.
The lean appeared after a cold winter. Frost can lift shallow footings, especially in clay soil.

Choose the right repair

What you found	Sensible repair	Effort
Slight lean, solid post, loose soil	Push back upright, brace, and compact gravel or fresh soil around the base	Low
Solid post, footing cracked or shallow	Dig out, reset in a new footing	Medium
Rot only at ground level, sound wood above	Bolt a metal or concrete repair spur beside the post	Medium
Rot running well up the post, or several posts leaning	Replace the post or posts	High

Before you dig

Two checks come before any spade goes into the ground. First, find out whether cables or pipes run near the fence line; many areas have a free service that marks buried utilities, and using it is far cheaper than hitting a gas or water line. Second, if the fence sits on a shared boundary, talk to your neighbour about the work, since you may need to step into their garden or agree who pays for what.

Resetting a post that is still sound

Support the panels on either side with blocks or a helper, and unscrew or unclip them from the post if they are pulling it over.
Dig around the post on all sides, down to the bottom of the old footing. If concrete is stuck to the post, it may be easier to lever the whole lump out and break it up.
Put a layer of gravel in the bottom of the hole so water can drain away from the end of the post.
Stand the post back in, check it with a spirit level on two neighbouring faces, and hold it there with two diagonal timber braces screwed to stakes in the ground.
Backfill with either compacted gravel and soil in thin layers, tamping each one firmly, or with post concrete mixed according to the bag. Slope the top of the concrete away from the post so rain runs off instead of pooling against the wood.
Leave the braces in place until the concrete has cured, following the time on the product, before refitting the panels.

Using a repair spur on a rotted base

When the post has only rotted at ground level, a repair spur can save replacing it. The spur is driven or set into the ground right beside the old post, and the sound part of the post is bolted to it above the rot. It is not the prettiest solution, but it is quick and keeps the fence line intact. If the rot reaches higher than the top of the spur, replacement is the better option.

Keeping posts upright for longer

Most leaning posts start with water. Keep soil, mulch and leaf piles from banking up against the base, trim back climbing plants that hold moisture against the wood, and make sure sprinklers do not soak the same posts every evening. A heavy gate deserves a sturdier post and a deeper footing than the rest of the fence. Anything else in the garden that catches the wind works on the same principle; the guide to features to look for in retractable awnings shows how wind sensors and solid fixings protect a shade structure from the same forces that push panels over.

If several posts are leaning at once, the ground slopes steeply, or the fence is part of a pool barrier, it is usually time to bring in a professional. Comparing quotes properly matters here, and the article on comparing fencing contractors side by side sets out what to look for beyond the price. Deck posts rely on the same footings and drainage, so the overview of why experienced deck builders get the structure right is worth a look if a raised deck sits next to the fence.