What Happens During Professional Stump Grinding
Quick answer: A stump grinder is a machine with a spinning cutting wheel that chews the stump down below ground level. It leaves a pile of wood chips mixed with soil. A typical single stump takes well under a couple of hours. Before any grinding, utilities should be located by calling 811.
Step 1: Locate underground utilities
Idaho's damage-prevention law defines "excavation" broadly, as any operation that moves earth. Call 811 so buried lines can be marked before grinding starts.
Step 2: Check access
The grinder has to reach the stump. Measure your gate. Compact grinders fit through narrow gates, but larger machines grind faster. Tell the company about slopes, steps or soft lawn.
Step 3: Clear the area
Rocks, edging and debris around the stump are removed so they don't damage the cutting teeth or get thrown.
Step 4: Grind
The operator sweeps the wheel back and forth across the stump, lowering it a little each pass, until the stump is below grade. Surface roots can be chased and ground too, which costs extra.
Step 5: Clean up
The grindings are either left in the hole, spread as mulch, or hauled away. Ask which is included in the quote.
How deep does it go?
Usually several inches below the surface: enough for soil and grass. If you're planting, building or pouring concrete, ask for a specific depth in writing.
After grinding
- Remove most of the chips and fill the hole with topsoil before seeding.
- Expect some settling over the following months.
- Plant a new tree a few feet away from the old stump, not in the same hole.
Cost
Homeyou's 2026 Boise data puts a single stump at about $85–$145, or $2–$3 per inch of diameter. Stump grinding in Boise →
Sources: Idaho Code 55-2202 · Homeyou: stump removal costs in Boise