Fence post repair typically costs $75-$150 per post. Full post replacement runs $150-$300 per post. The right choice depends on how damaged the post is, whether the damage is above or below ground, and how many posts have problems.
Posts are the foundation of your fence. When they fail, sections lean, gates stop working, and eventually the fence comes down. Catching post problems early gives you more repair options.
Signs your fence post needs attention
- The push test: Push firmly on the post at chest height. Any movement means the post base is compromised.
- Visible lean: Posts should be plumb (vertical). Noticeable lean indicates failure below ground.
- Soft wood at base: Poke the post at ground level with a screwdriver. If it sinks in easily, rot has started.
- Cracks or splits: Vertical cracks weaken posts. Horizontal cracks near the base are serious.
- Gaps at ground level: Space between post and concrete means the post has shrunk from rot.
Repair options (when replacement is not necessary)
Post bracing/sistering ($75-$150)
If the post is still mostly solid but has some rot at the base, we can attach a metal or concrete brace alongside it. This transfers the load to a new footing without removing the post. Works well when the above-ground portion is still good.
Concrete collar ($100-$175)
For posts that have loosened in their concrete footing, we can add additional concrete around the base. This stabilizes the post without digging it out. Works when the post itself is sound but the original concrete has cracked or shifted.
Post mender/steel support ($75-$125)
Metal brackets that bolt to the existing post and provide a new ground anchor. Good for posts with rot limited to the bottom few inches. The bracket extends below the rot into solid ground.
When full replacement is the answer
- Rot extends more than 6 inches above ground: Too much structural damage to brace effectively.
- Post snapped or broken: Obvious case for replacement.
- Multiple failing posts: If several posts are going, repairs may cost more than replacing the fence section.
- Gate posts: These take extra stress. A compromised gate post usually needs full replacement to function properly.
Post replacement process
- Step 1: Remove fence panels attached to the post
- Step 2: Dig out old post and concrete (the hard part)
- Step 3: Set new post in fresh concrete, 24-30 inches deep
- Step 4: Level and brace while concrete cures
- Step 5: Reattach fence panels
The whole process takes 2-4 hours per post depending on soil conditions and access.
Cost comparison
| Option | Cost per post | Best for |
|---|---|---|
| Post mender/brace | $75-$150 | Minor rot at base only |
| Concrete collar | $100-$175 | Loose post, sound wood |
| Full replacement | $150-$300 | Significant rot or damage |
Frequently asked questions
Can I replace a fence post myself?
It is possible but labor-intensive. Digging out old concrete in Houston clay is the hard part. If you have the tools and strength, budget a half-day per post.
Why do fence posts rot at the bottom?
The ground-level area stays damp longest after rain and never fully dries. This constant moisture promotes rot. Pressure-treated wood resists this but is not immune.
How can I prevent post rot?
Use pressure-treated posts rated for ground contact. Set posts in concrete with the top sloped away from the post. Keep sprinklers from hitting posts directly. Some people apply additional wood preservative to the buried portion.
Get an honest assessment
We will tell you whether repair or replacement makes sense for your situation. Sometimes a $100 repair saves you from a $2,000 problem later. Sometimes replacement is the only real fix.