Leaning Post Repair · Kansas City
Leaning fence post: fix it or replace it?
A two-minute test tells you which one you're looking at. Here's how to diagnose it, what it costs in the KC metro in 2026, and the footing depth that keeps it from happening again.
Post repair quote
Text a photo of the leaning post for a faster quote.
Why it happens
Four reasons posts lean in Kansas City.
Footing set above the frost line
Kansas City's frost depth is about 30 inches. A footing poured only 18–24 inches deep gets heaved every winter by freeze-thaw, and each cycle loosens the post a little more. This is the single most common cause of leaning fences across the KC metro.
Rot at grade
Wood posts fail right where soil, mulch, and sprinkler spray meet air. The post can look fine above ground and be hollow at the surface. Push-test it: if it moves but the concrete plug doesn't, the post rotted, not the footing.
Gate load on a line post
A 5-ft gate hung on a standard 4x4 line post pulls that post out of plumb within a few seasons. Gate posts need a bigger post and a deeper, wider footing than the rest of the run.
Soil, slope, and clay
Much of Johnson and Jackson County sits on expansive clay that swells wet and shrinks dry. Add a slope or a nearby downspout and posts walk downhill. Panels that are all leaning the same direction usually point to soil movement, not one bad post.
Diagnose it
Five checks before you call anyone.
Check 1
Grab the post and rock it
If the post moves and the concrete stays put, the post has rotted or rusted through at grade — it needs replacing, not resetting.
Check 2
Look for the concrete plug
If the whole footing tilts as a unit, the hole was too shallow or too narrow. The post itself is usually still good and can be reset in a new, deeper footing.
Check 3
Probe below grade with a screwdriver
Push a screwdriver into the post 2 inches below soil level. If it sinks in more than a quarter inch, the wood is punky and the post is done.
Check 4
Count how many posts are off plumb
One or two leaning posts is a repair. Four or more across a 100-ft run, plus sagging rails, usually means the whole fence is at end of life and replacement is the better spend.
Check 5
Check the rails and pickets
If rails have pulled loose or split at the post, resetting the post alone won't hold. Budget for rail and fastener work in the same visit.
The fix
How a leaning post gets reset properly.
- 1
Support the panels
Brace the fence sections on both sides of the post with 2x4s and stakes so the run holds its line while the post is out.
- 2
Detach the rails
Unscrew the rails from the leaning post only. Leave the neighboring posts untouched so the fence keeps its spacing.
- 3
Dig out the old footing
Break up and remove the old concrete completely. Setting a new post against old concrete leaves a void that fills with water and refreezes.
- 4
Re-dig to 30+ inches
Auger the hole to at least 30 inches — below the Kansas City frost line — and about three times the post width. Gate posts go 36–42 inches.
- 5
Add a gravel base
Put 4–6 inches of compacted gravel at the bottom so water drains away from the post end instead of sitting on it.
- 6
Set the post plumb and crown the concrete
Brace the post plumb on two faces, pour concrete, and slope the top of the footing away from the post so water runs off instead of pooling at the collar.
- 7
Cure, then re-hang
Let the concrete set 24–48 hours before reattaching rails and re-hanging any gate. Re-hanging early is how a fresh reset starts leaning again.
The depth number is the part most DIY resets get wrong. Full spec in our Kansas City fence post depth guide.
2026 pricing
What post repair costs in the KC metro.
| Repair | Installed price |
|---|---|
| Reset one leaning line post (existing post reused) | $325–$550 |
| Replace one rotted line post | $350–$600 |
| Reset or replace a gate post (deeper, wider footing) | $425–$700 |
| Steel-core or steel post upgrade, per post | +$75–$160 |
| Rail repair / re-fasten at the post | $65–$180 |
| Gate re-hang after post work | $180–$450 |
| 3–4 posts in one visit (per post, volume rate) | $260–$430 |
Prices are 2026 Kansas City metro ranges for residential fences and include labor, concrete, and haul-off. Exact pricing comes from a free on-site walk. Full breakdown on our fence repair cost guide.
FAQ
Leaning fence post questions.
- Brace the panels, detach the rails from the leaning post, remove the old concrete entirely, re-dig the hole to at least 30 inches (below the Kansas City frost line) and about three times the post width, add 4–6 inches of compacted gravel, set the post plumb, and crown the concrete so water sheds away. Let it cure 24–48 hours before re-hanging rails or a gate.Copy link to this answer
- Rock the post. If the post moves while the concrete plug stays put, the post has rotted or rusted at grade and needs replacing. If the whole footing tilts as one unit, the post is usually still sound and can be reset in a new, deeper footing. If a screwdriver sinks into the post below grade, replace it.Copy link to this answer
- In the KC metro, resetting one leaning line post runs $325–$550 installed, replacing a rotted post $350–$600, and a gate post $425–$700 because it needs a deeper 36–42 inch footing. Booking three or four posts in one visit drops the per-post rate to roughly $260–$430.Copy link to this answer
- Most often the footing was poured above the roughly 30-inch frost line, so freeze-thaw heaves it every winter. The other common causes are rot at grade from soil and sprinkler contact, gate weight hung on a standard line post, and expansive clay soil that swells and shrinks with moisture.Copy link to this answer
- At least 30 inches in the Kansas City area — below the local frost line — with a hole about three times the post width. Gate and corner posts go 36–42 inches. Anything shallower will heave, no matter how much concrete is used. See our post depth guide for the full spec.Copy link to this answer
- No. Adding concrete against the old footing creates a seam that traps water, and it does nothing about a hole that was too shallow to begin with. The old concrete has to come out and the hole has to be re-dug to frost depth, or the post leans again within a couple of winters.Copy link to this answer
- Both. Use 4–6 inches of compacted gravel at the bottom of the hole for drainage, then concrete around the post with the top crowned to shed water. Gravel-only sets drain well but hold less against gate load and wind in clay soil.Copy link to this answer
- As a rule of thumb, once four or more posts in a 100-foot run are off plumb and the rails have started pulling loose, replacement costs less over ten years than repeated repairs. One to three posts is almost always a repair.Copy link to this answer
- The post work itself is a half-day for one to three posts. Concrete needs 24–48 hours to cure before rails and gates go back on, so we either return the next day or set the panels loose and finish on a second short visit.Copy link to this answer
- No. Repairing or replacing posts in an existing fence line is maintenance and does not require a permit in Overland Park, Olathe, Leawood, KCMO, Lee's Summit, Independence, or Shawnee. A permit is only needed if you move the fence line or change its height.Copy link to this answer
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