How Much Does Stump Grinding Cost, and What Happens to the Roots?

Stump grinding costs $120 to $400 for most stumps in Austin. What you are paying for is a wheel of carbide teeth chewing the stump into mulch, a few inches at a time, down to 8 to 12 inches below ground level.

What it does not do is pull the stump out or dig up the roots. That matters for what happens next, and it is the part people are most often surprised by.

Prices by stump size

Diameter across the top	Price	Time
Under 12 in	$120 – $180	~20 minutes
12 – 24 in	$180 – $280	30–60 minutes
24 – 36 in	$280 – $400	1–1.5 hours
Over 36 in	$400+	Half a day
Extra stumps, same visit	From $80 each	—
Surface roots ground out	+$60 – $200	—

Three things add cost. A stump tight against a wall or fence post, where the machine cannot swing freely. A gate under 36 inches, which forces a walk-behind grinder and roughly doubles the time. And limestone, which on the west side of Austin and across Cedar Park sits inches under the surface and blunts teeth fast.

What happens to the roots

They stay in the ground and rot. Depending on species and how wet the soil stays, that takes three to ten years. Live oak and pecan roots are slow. Hackberry and Arizona ash go noticeably quicker.

Nothing about that process threatens your foundation or your plumbing. Dead roots shrink as they decay rather than growing, so they move away from things rather than into them. The one thing that does happen is settling: as wood breaks down underground, the surface above it drops, and you may be topping up the spot with soil once or twice over the first couple of years.

One species-specific warning. Live oaks sucker from the root system after the trunk is gone, sometimes for a year or two, and you will be pulling up or mowing off shoots across that part of the lawn. Hackberry and Chinese tallow do it too. Mowing them off repeatedly exhausts the roots, and that is the whole fix.

How deep is deep enough

Eight to twelve inches below grade for grass, sod or anything you will mow over. That is our standard and it is what a fair quote should say.

Three or four inches is cheaper and it is what a lot of low quotes quietly mean. It leaves wood close enough to the surface that the ground sinks within a year and you get mushrooms every spring. If you plan to plant a tree in the same place, you need 18 inches or more, and honestly you are better off planting three or four feet to one side.

What to do with the hole and the chips

Grinding produces far more volume than the hole can take, because chipped wood occupies much more space than solid wood did. You will have a mound.

If you want grass there this season, take all the chips away and backfill with quality topsoil, slightly proud of the surrounding grade so it settles level. Wood chips tie up nitrogen as they decompose and new St. Augustine struggles badly in them.

If it is going to be a planting bed, leave the chips as mulch and you have saved yourself a delivery. Either way, do not mound the chips and lay sod straight over them, because the ground will drop two or three inches within a year and you will have a dip to fill. More on that in how to level ground after tree removal, and on using the chips in what to do with wood chips.

When you can plant

Grass within days, once the chips are cleared and topsoil is in. A new tree should wait about a year, and go a few feet to one side rather than into the same hole. The remaining wood ties up nitrogen while it decays, which is hard on anything trying to establish roots.

Grinding an old stump

Perfectly normal, and often easier than a fresh one because the wood has softened. Plenty of the stumps we grind around Austin were left years ago by a cheap removal that stopped at ground level. Send a photo with something for scale and it gets quoted as a standalone visit.

Tell us about buried irrigation, low-voltage lighting or anything else you put in yourself. We call 811 for the public utilities, but 811 has no record of the sprinkler line the builder ran past the tree.