Here’s how to remove a rotten fence post quickly and easily with a shovel and sledge hammer and set the replacement post so it won’t rot again.
Yank the fence post out of the ground after you've broken off enough concrete to lighten the load.
If you have a rotting fence post that needs replacement, here's how to get the concrete pier out of the ground.
It's not complicated, but you'll definitely work up a sweat. First, dig a semicircular hole the same depth as the concrete, around one side of the pier. Make the hole large enough so you can get a good swing at the concrete with a sledgehammer. When about half the concrete is broken off, you and a helper should be able to lift the post out of the hole. Sometimes the post breaks off during lifting. In that case, tie a rope around the pier to lift it out.
When setting a fence post, you should always pour concrete so it extends a few inches above the grass and taper the edges to drain water away from the wood post. Burying the concrete below the surface may look nicer, but it’s a surefire way to accelerate wood rot.