Home › Guides
The question is not which method is better. It is which method is right for what you plan to do with that spot next. Most people are sold one or the other based on price, and get it wrong.
The choice between stump grinding and full stump removal is not about which method is better. It is about what you plan to do with that spot after the stump is gone. Most people are sold one or the other based on price or availability rather than based on what is actually appropriate for the intended use. Getting it wrong either costs more than necessary or creates a problem that becomes obvious a year or two later.
The short version: if the area is going to be lawn, garden bed, or low-use landscape, grinding is the correct choice. If anything is going to be built, poured, paved, trenched, or founded on that spot — or within the reach of the root system — full extraction is the correct choice. Beaverton Excavation Co. recommends deciding what goes there first, then picking the removal method that fits. The method should follow the plan, not drive it.
A stump grinder is a machine with a rotating carbide-tipped wheel that chews the stump down below grade — typically 6 to 12 inches below the surface, sometimes a bit deeper. What remains after grinding is a hole full of wood chips and grindings, with the entire root system still in the ground. The visible stump is gone. The roots are not.
The grindings — the woody chips left in the hole — look like mulch but are not appropriate as fill. They are wood with a high carbon-to-nitrogen ratio that will decompose over the following years as the root system also decays. As that organic material breaks down, the ground above it settles. For a garden bed or lawn, this is manageable — you top-dress it and overseed as it settles. For anything structural, it is a problem.
Grinding is faster, cheaper, and less disruptive than full extraction. The machine can often access areas where a full removal machine cannot. The hole is smaller and easier to deal with. For the majority of residential stumps where the area is going back to lawn or landscape, grinding is the right answer.
Full extraction removes the stump and the root ball — the mass of roots radiating out from the base of the tree. The root ball is substantially larger than the visible stump. For a tree with a 24-inch trunk diameter, the root ball may be 6 to 8 feet across and 3 to 5 feet deep. Pulling it out requires a large excavator or a stump puller attachment, significant pulling force, and room to work.
What full extraction leaves behind is a substantial void. That void is larger than most people expect — it is not just the stump hole, it is the entire volume of the root ball. That void needs to be backfilled with suitable material and compacted in lifts before any structure or paved surface goes on top. Leaving it empty or loosely filled leads to settlement. stump removal that includes proper void backfill costs more than just pulling the root ball and leaving.
Ask one question: what goes there next?
Roots do not stop being there just because the stump is gone. After grinding, the root system remains in the ground intact. It is dead — the tree is gone and the roots are no longer feeding — but the physical wood is still there. In Tualatin Valley silty clay, which stays wet for much of the year, root decay is slower than in well-drained soils. The root system of a large tree may take 5 to 15 years to break down substantially.
As roots decay, they leave channels — small tunnels in the soil where the root material used to be. Those channels can hold water, collapse under load, or allow other plant roots to track. In a lawn context, the effect is minor: you may notice slight depressions in the lawn over the following years as the root channels compact. In a structural context, those channels represent voids that can undermine the load-bearing capacity of the soil.
In the wet clay soils common in Washington County, which stays wet for much of the year, root decay is slower than in well-drained soils. The practical implication is that ground settling above a root system is a multi-year process, not something that resolves in a single season. In a structural context, those channels represent voids that can undermine the load-bearing capacity of the soil. Site preparation done correctly — identifying root extent, backfilling voids in lifts — prevents differential settlement that is expensive to fix after construction.
One claim that comes up is that roots keep growing after grinding because the tree's hormones persist. That is not accurate. The roots die when the tree is cut down, and grinding severs any remaining connection. The roots decay; they do not grow. What does happen is that some trees — particularly certain species — can produce suckers from existing root tissue even after the trunk is gone. These are new shoots from existing roots, not root growth per se. For most tree species in the Pacific Northwest, this is not a significant issue after grinding.
Not every stump can be reached by every machine. A stump grinder needs a clear path to the stump — wide enough for the machine, without overhead obstructions that prevent the boom from being positioned correctly. A large commercial grinder may need a 36-inch gate opening minimum. Smaller track grinders can fit through narrower openings but are slower on large stumps.
Full extraction with an excavator needs considerably more room. An excavator working a large root ball needs enough swing radius to pull material out and set it to the side. In a tight backyard with a fence, a pool, or an outbuilding close by, full extraction may not be possible without removing the fence or working around significant constraints. This is a real consideration — sometimes grinding is the right answer not because it is the best method for the intended use but because extraction simply cannot be done without damage to something else.
Large trees — significant diameter, deep root systems — often require both. The stump and root ball are extracted, and then the surrounding root system is cut and ground at grade to eliminate trip hazards and reduce the volume of material decaying in the ground. The combined approach costs more but leaves the ground in better condition than either method alone.
Grinding is less expensive than full extraction for the same stump. A standard residential stump — 12 to 24 inches in diameter — typically runs $150 to $500 to grind, depending on location, access, and how many other stumps are being done at the same time. Multi-stump jobs cost less per stump than single stumps because mobilization is shared.
Full extraction costs more because it requires heavier equipment, takes longer, and leaves a void that needs to be dealt with. A single root ball extraction with backfill typically runs $400 to $1,200 or more for a large tree, not counting haul-away for the root ball itself. Root balls from large trees are substantial — a heavy mass of woody material and soil that needs to go somewhere.
The cost difference matters less than the fitness-for-purpose question. Paying $300 to grind a stump where you are about to pour a concrete pad is paying for the wrong solution — the roots are still there and the pad will have problems. Paying $800 to extract a stump where you are just putting in lawn is paying more than you needed to. Match the method to the plan.
If you are unsure what the future use of the area is — if the lot is being cleared and the development plan isn't final — grinding now and extracting later is an option, though it costs more in total than doing the right thing once. The better path is to finalize the use before deciding on the stump method.
For large trees close to structures, utility lines, or other improvements, get a look from an operator before deciding on method. The root system of a tree next to a foundation may already be under the foundation slab, and pulling the root ball could undermine the footing. That is a situation where grinding is the correct method regardless of the intended future use of the surface, because extraction risk outweighs the benefit.
If you have a stump from a large tree and are planning any construction on the property within the next few years, full extraction now is almost always the better economic choice. Doing it before construction equipment is on site, before a driveway is in, and before other improvements are near that spot is much cheaper than removing it later when access is constrained and the surrounding work has to be protected.
Better depends entirely on what goes in that spot next. Grinding is correct for lawn and landscape — it is faster, cheaper, and leaves the ground in reasonable shape for those uses. Full removal is correct when anything structural, paved, or trenched will be in the area, because grinding leaves the root system in the ground to decay and settle. There is no universally better method; there is only the method that matches the intended use.
No. Tree roots die when the tree is cut down, and grinding severs any remaining connection to the stump. The root system decays in place over years rather than growing. Some tree species can produce new shoots from existing root tissue — called suckers — but this is growth from existing roots, not root extension, and it stops as the roots decay. For most species common in the Pacific Northwest, suckering after grinding is minimal.
Yes, significantly. Grinding a residential stump typically runs $150 to $500 depending on size and access. Full extraction runs $400 to $1,200 or more for a large tree, not counting root ball disposal. The cost gap is real, but the question is whether cheaper is right for the situation. Grinding the wrong stump — where a structure or pavement will follow — costs money twice: once for the grind and once to deal with the settlement problem later.
A stump 36 inches in diameter is a large stump — a significant tree. Expect $400 to $800 or more to grind it, depending on accessibility, how many roots are above grade, and whether the grindings are removed or left in the hole. Grinding depth matters too: grinding 6 inches below grade costs less than grinding 14 inches below grade, which may be needed if a surface or structure is following. Single-stump jobs cost more per stump than multi-stump jobs.
Stump grindings are woody chips, not fill material. They decompose over years and the ground above them settles as they do. For a garden bed, mix them out with native soil or remove them — they tie up nitrogen as they break down, which competes with plants. For a lawn area, they can be raked mostly flat and covered with topsoil before seeding. Do not use grindings as structural fill under a pad, driveway, or any surface that needs to hold a grade.
It depends on root size, soil moisture, and species. Fine feeder roots may decay within a few years. Large anchor roots from a mature tree can take 10 to 20 years to fully break down in the wet clay soils common in Washington County, where decay is slower than in well-drained soils. The practical implication is that ground settling above a ground root system is a multi-year process, not something that resolves in a single season.
Most of these questions have a general answer and a site-specific answer, and the site-specific one is the one that decides the cost. If you want a real number for your property, call (458) 272-9359 or send the details and we will walk the ground with you.