What stump grinding involves
Sonoma-Marin Tree Service connects property owners in Sonoma and Marin counties with local contractors who grind stumps, whether the tree came down last week or ten years ago. A stump grinder is a rotating cutting wheel that chews the stump into chips, working down below the soil surface. The roots below are left to decay in place. Machines range from narrow walk-behind units that fit through a garden gate to large tracked grinders for big stumps, and access is a big part of what a job costs.
Stumps are often priced separately from tree removal, so if you are getting a removal quote, ask whether grinding is included or quoted as an add-on.
How deep, and what about the roots?
There is no single right depth. What matters is what you plan to put there. Lawn or groundcover needs less depth than a new tree, a raised bed, or a patio. Tell the contractor your plans up front, and ask them to write the grind depth into the quote. Large surface roots that run across a lawn can usually be ground too, for an extra charge.
Grinding leaves a mix of chips and soil in the hole. For replanting, most of the chips should come out and be replaced with soil, and it is usually best to plant a new tree a little to one side of the old stump rather than directly in it.
Call 811 before grinding
Stumps often sit right where gas, water, sewer, irrigation, and low-voltage lines run. California's dig law generally requires calling 811 at least two working days before excavation so utilities can mark their lines, and many stump grinding contractors make that call before grinding. Private lines, such as sprinkler pipes, landscape lighting, and the sewer lateral to the street, are not marked by 811, so point those out if you know where they are. Roots from big trees can wrap around old clay sewer laterals; see our redwood page for more.
Redwood and eucalyptus stumps
Some local trees do not give up when cut. Coast redwoods are well known for sprouting from the stump and root crown, which is how many of the second-growth redwood rings in Mill Valley, Guerneville, and Sebastopol began. Blue gum eucalyptus also resprouts readily from cut stumps. Grinding removes most of the sprouting tissue, but vigorous stumps may still push up shoots for a while, and they need to be cut back until the roots exhaust themselves. Ask the contractor about follow-up before the job, and see our eucalyptus removal page for more on regrowth.
Hillside and tight-access stumps
Many North Bay stumps are on slopes, behind retaining walls, or down a narrow side yard. Small grinders can reach most of them, but very steep or unstable ground may call for a different approach, such as cutting the stump flush and leaving the roots to hold the slope. On hillsides, a stump and its roots can help hold soil, so think before pulling one out entirely. Homes in San Anselmo and other steep Marin towns often face this choice.
Hiring for stump work
Stump grinding for pay is contractor work in California, and most tree service contractors licensed by the Contractors State License Board offer it. Before you hire anyone, look the contractor up at cslb.ca.gov and ask for a certificate of liability insurance. You can check any license at cslb.ca.gov.
Have stumps to grind? Call (707) 634-8593 or request an estimate and we'll connect you with a local tree service contractor.
Tree services in Sonoma County & Marin County
- Tree Removal → Removal of dead, leaning, diseased, and unwanted trees, including large oaks, redwoods, and eucalyptus on tight or sloped lots.
- Storm-Damaged & Fallen Tree Removal → Fallen trees, split trunks, hanging limbs, and trees on roofs, fences, or driveways after North Bay winter storms.
- Tree Trimming & Pruning → Crown thinning, deadwood removal, structural pruning, and clearance pruning for oaks, redwoods, and ornamentals.
- Stump Grinding & Removal → Grinding stumps and surface roots below grade so you can replant, lay lawn, or build, plus full stump removal where needed.
- Arborist Reports & Tree Permits → Arborist reports for city and county tree removal permits, protected and heritage trees, and construction near trees.
- Defensible Space & Fire Clearance → Limbing up, juniper and brush removal, dead tree removal, and chipping for Marin evaluations and Sonoma inspections.
- Oak Tree Removal & Sudden Oak Death → Dead and dying coast live oaks, tanoaks, and valley oaks, including Sudden Oak Death losses and protected-oak permits.
- Eucalyptus Tree Removal → Taking down tall, brittle blue gum eucalyptus near homes, roads, and fire zones, and dealing with regrowth.
- Redwood Tree Removal & Trimming → Redwoods crowding foundations, driveways, and sewer lines, thinning redwood groves, and removals where a permit allows.
- Crane Tree Removal → Crane-assisted removals for big trees over houses, on steep hillside lots, and anywhere there is no room to drop or rig.
- Dead & Hazardous Tree Removal → Dead, dying, cracked, and leaning trees that threaten the house, the street, or the neighbors, with the paperwork hazard removals need.
- Roof Clearance & Limb Removal → Lifting limbs off roofs, gutters, chimneys, and decks for fire clearance, insurance letters, and plain peace of mind.
- Tree Risk Assessment → A qualified look at a leaning, cracked, or hollow tree before a storm decides for you, with a written recommendation.
- Lot Clearing & Brush Chipping → Clearing overgrown lots, thinning small trees and brush, and chipping or hauling the debris for building, fire safety, or sale.
- Fruit Tree & Olive Pruning → Dormant and summer pruning for backyard orchards, old olives, and heritage fruit trees on wine country properties.
- Palm Tree Trimming & Removal → Skinning and trimming tall palms, removing dead fronds and seed pods, and taking out palms that have outgrown the lot.
- Tree Cabling & Bracing → Support systems for split trunks and heavy limbs on trees worth keeping, installed and inspected to industry standards.
- Insurance-Required Tree Removal → Clearing trees and limbs an insurer has flagged before a policy renewal or non-renewal deadline, with documentation.
- View Pruning → Opening up bay, hill, and valley views with selective thinning and reduction that keeps the tree healthy and the neighbors on side.
Frequently asked questions
How much does stump grinding cost?
National 2026 cost guides put a typical single stump somewhere around $130 to $525, with averages near $270 to $330, and extra stumps on the same visit usually cost less each. Large redwood and eucalyptus stumps, tight access, and surface-root grinding push the price up, and North Bay prices can run higher than national averages. A written quote after someone sees the stump is the reliable number.
Grinding or full stump removal: which do I need?
Grinding is enough for most yards: it chews the stump into chips below the soil surface and leaves the roots to decay in place. Full removal, digging or pulling the stump and main roots, is more disruptive and is usually only worth it where something will be built or a foundation, slab, or pipe has to go in exactly where the stump sits.
Will the stump grow back?
Many trees will not, but some species are known for resprouting from the stump or roots. Coast redwoods and blue gum eucalyptus are two common local examples. Grinding helps, but persistent sprouts may need to be cut back repeatedly, and some contractors offer follow-up treatment. Ask before the job.
What happens to the wood chips?
Grinding produces a surprising pile of chips and soil. Some homeowners keep them as mulch away from the house; others pay to have them hauled. In fire-prone areas, keep wood mulch out of the area right next to the house.
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