What is stump grinding?
Stump grinding is the mechanical removal of a tree stump using a petrol-powered machine with a rotating cutting disc fitted with carbide teeth. The disc chips the stump down to 150–300mm below ground level in 15 minutes to 2 hours, leaving wood chips behind that backfill the hole.
The machine itself ranges from a 13hp narrow-access grinder that fits through a 750mm gate up to a 27hp tracked unit for large jobs. The cutting wheel spins at around 1,000 rpm. Carbide-tipped teeth — most often Greenteeth or Sandvik — bite into the wood end-grain and shave it away in thin layers.
Unlike full stump removal, grinding does not pull roots out of the ground. The crown and main flare are reduced to chips; the lateral roots stay in the soil and decay naturally over 5 to 10 years. For 95% of domestic gardens this is invisible and harmless.
Stump grinding sits between the cheapest option (chemical stump killer) and the most thorough (full excavation). It is the standard professional method across the UK because it is fast, clean, and finishes a stump in one visit.
How does the process work?
A 13hp to 27hp grinder is wheeled to the stump, the surrounding soil is cleared, and the spinning carbide disc sweeps across the wood in 50mm passes. The machine chips the stump down 150–300mm below grade in 15 minutes to 2 hours, depending on size and hardness.
The sequence on a typical visit is short and the same every time:
- Site check (5 min) — locate services with a CAT scanner, confirm access, lay ground-protection boards on lawns.
- Stump prep (5 min) — clear soil, stones, and turf from the crown so the teeth meet wood, not grit.
- Initial cut (5–10 min) — the operator drops the cutting wheel onto the highest point and lets the disc do the work, sweeping side to side.
- Layered grinding (10–90 min) — the disc lowers 50mm at a time, working the stump down in thin horizontal slices.
- Finish depth (5 min) — grinding continues to 150–300mm below ground so no part of the stump can re-sprout or interfere with new planting.
- Backfill and clean (10–20 min) — wood chips are raked into the hole, the area is swept, and any excess chips are bagged or removed.
A skilled operator works downwind, never lets the disc bog, and keeps the grinder anchored when working on a slope. PPE includes a full visor, ear defenders, chainsaw trousers, and steel-toed boots. The job is loud — around 100 dB at the operator — but the chip spread is contained inside a debris screen.
How much does it cost in the UK?
UK stump grinding costs £85 to £300 per stump in 2026. Small soft-wood stumps under 12 inches start at £85; large hardwood stumps over 36 inches reach £300 or more. Most jobs land between £120 and £200, and additional stumps on the same visit are roughly 35% cheaper.
Diameter is the single biggest cost driver. The UK trade average is £2 to £3 per inch of stump diameter at ground level, with a minimum charge of £80–£150 to cover travel and setup.
| Stump size | Diameter | Typical UK price | Time on site |
|---|---|---|---|
| Small | Up to 12" | £85–£120 | 15–30 min |
| Medium | 12"–24" | £120–£200 | 30–60 min |
| Large | 24"–36" | £200–£300 | 60–90 min |
| Extra-large | 36"+ | £300+ | 90–120 min |
On top of size, three factors fine-tune the figure: wood hardness (oak, beech, yew add 20%), access (narrow gates or distance from the van add 15–35%), and extras like surface root removal (£25–£75) or off-site chip disposal (£25–£50). A specialist will quote each line before any work starts. For the full breakdown by diameter, wood type, and region, see our UK stump grinding cost guide.
When should you call a professional?
Call a professional when the stump is over 12 inches wide, near a building, on a slope, within 3 metres of services, or covered by a TPO. Pro jobs cost £85–£300 and finish in 15 minutes to 2 hours; DIY hire costs £200–£400 plus half a day of risk.
The honest test is risk versus reward. A small softwood stump in the middle of an open lawn is genuinely DIY-friendly with a hire grinder. Anything else tips the maths toward a pro.
| Situation | DIY? | Why |
|---|---|---|
| Stump under 8", soft wood, open access | Possible | One-day hire £80–£150, low risk |
| Stump 12"+ or hardwood (oak, beech, yew) | No | Hire grinder underpowered, hours wasted |
| Within 3m of buildings, fences, or paving | No | Damage risk to footings and surfaces |
| Slope greater than 1-in-5 | No | Grinder anchoring, kick-back risk |
| Underground services nearby | No | CAT scanner needed; one strike is catastrophic |
| Under a Tree Preservation Order | No | Council-recorded works, possible permit required |
| Multiple stumps (3+) | No | Pro is cheaper per stump after the first |
A professional also brings public liability insurance (£5m is the trade standard), the right machine for the job, and the experience to spot hidden ironwork, old foundations, and root collars that fight back. Most specialists give a fixed quote from a photo, so there is no callout fee and no surprise charges on the day.
The Stump Doctor covers Canterbury and the 27 towns within 15 miles of the city — see our Canterbury stump grinding service for what is included locally. For a fixed price within the hour, send a photo and postcode through the free quote form — no deposit, no obligation, and you only pay when the area is clean.
