Tree Removal
Dead, dangerous and badly sited trees taken down whole or dismantled in sections where there is nowhere to drop them.
Learn more →What grinding actually removes
A stump grinder is a rotating wheel with carbide teeth on a hydraulic arm. The operator sweeps it across the stump, taking a few millimetres at a pass, and works down and out until the stump and the upper root plate are chip. It does not pull anything out of the ground. The lateral roots stay where they are and rot away over the following years.
That distinction is the whole difference between this service and stump removal. Grinding leaves a hole full of wood chip and a decaying root system. Excavation leaves a proper void in clean ground. One is for turf and garden; the other is for concrete.
Central Coast ground conditions
Three things slow a grinder down here, and each of them shows up in a quote.
Sandstone. Through Gosford, Kariong, Somersby and the ridge country the soil is shallow over rock. A stump sitting on sandstone is quick on top and abruptly finished at depth, which is usually fine — but it means you cannot always get the depth you want.
Sand. On the Woy Woy Peninsula and the coastal dunes the ground is soft and the machine cuts easily, but sand carries grit that blunts teeth fast and the hole slumps as you go. Backfill settles more here than anywhere else on the Coast.
Buried services and fill. Older lake-edge and river-flat blocks around Long Jetty, Chittaway and Wyong have been filled and re-filled. Grinding wheels find old fence wire, brick rubble, irrigation and, occasionally, unmarked services. A Dial Before You Dig enquiry is cheap insurance and should be done before a machine arrives, not after.
Pricing drivers
Stump diameter at ground level is the headline number, but it is rarely the biggest one. Access matters more: a stump a grinder can drive to costs a fraction of the same stump behind a locked side gate. Then comes the number of stumps, because mobilisation is a fixed cost and the second and third stumps on the same visit are much cheaper than the first. Depth, proximity to fences, pipes and pool shells, and whether chip is carted or backfilled do the rest.
Booking the grind on the same day as the tree removal is the single easiest way to reduce the bill, since the crew is already on site with the gates open. The hidden costs guide covers the rest of the line items that catch people out.
When grinding is the wrong choice
If a slab, a pool shell, a retaining wall footing or a service trench is going over that exact spot, grinding is money wasted — the builder will still have to excavate the root plate. If the stump belongs to a suckering species, expect follow-up work. And if the stump is a protected tree that was removed without approval, grinding it does not make the problem go away; the fines guide explains why.
The regional stump grinding page has more on local soils and replanting, and there is a full comparison in stump grinding versus stump removal.
More services
Explore our other services
Stump Removal
Full stump and root-plate excavation where a slab, pool, footing or new service trench is going through the spot.
Learn more →
FAQs
Frequently asked questions
How deep does a stump grinder go?
Typically 200 to 300 millimetres below the surrounding ground level for turf or garden, and deeper where a fence post, paver bed or irrigation line is going in. Depth is a cost variable, not a fixed setting, so tell the operator what is going over the top before the machine starts. Grinding the same stump twice is more expensive than going deep once.
What happens to the wood chip?
By default the grindings are raked back into the hole, which is free and settles over a few months as the chip breaks down. Expect to top it up with soil. If you want the chip carted away so clean soil or turf can go straight in, that is a separate charge because it is a truck load of wet, heavy material.
Will the roots grow back after grinding?
Not for most species. Grinding removes the stump and the crown of the root plate, and the remaining roots die back and decompose in the ground. The exceptions worth knowing on the Central Coast are camphor laurel, privet, willow and some wattles, which can push suckers from surviving roots. Those may need follow-up treatment rather than another grind.
Can a grinder get into a narrow back yard?
Usually. Narrow-access machines fold to around 750 millimetres and will walk through a standard side gate, which covers most Central Coast blocks. Where it fails is a full-height colorbond fence with no gate, a stepped path, or a stump behind a pool fence. In those cases the options are a smaller machine, hand excavation, or lifting a fence panel.
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