Climber in a red jacket working high in a pine tree

Seattle, WA · dangerous trees

Hazardous Tree Removal in Seattle, WA

In Seattle, most hazardous trees are tall Douglas-firs or bigleaf maples with root rot, decay or a new lean, and they fail during October–March windstorms on saturated soil. Since July 2023, most private trees 6 inches and larger need an SDCI permit to remove, but hazardous trees have their own documented process. Steep slopes add environmentally critical area rules.

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When you need hazardous tree removal in Seattle

Leaning, cracked or decayed trees that could hit something if they fail.

The tree has started leaning, or leans more than it did, especially with cracked or raised soil opposite the lean.
There's a crack running through the trunk or down from a large fork.
Two trunks meet in a tight V with bark pinched between them, and the joint has begun to split.
Mushrooms, conks or soft, crumbly wood appear at the base or on the roots.
Large dead limbs or broken branches hang over the house, driveway or street.
Roots were cut in the last few years for a driveway, trench, addition or foundation repair.

Often needed with: Tree Risk Assessment services, Dead Tree Removal services, Emergency Tree Removal services, Large Tree Removal services.

Call and we'll connect you with a tree-service provider for hazardous tree removal in Seattle.

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What hazardous tree removal in Seattle includes

Assessment: What the tree could hit, its condition, and access.
Job planning: Whether it can be felled or must come down in sections.
Sectional removal and rigging: Limbs and trunk lowered on ropes near buildings.
Crane work when needed: For big or decayed trees over structures.
Brush and debris cleanup: Chipping branches and raking the work area.
Wood hauling or leaving rounds: Agree in advance which you want.
Stump options: Grinding is usually a separate line item.
Property protection: Mats, plywood or careful drops to protect lawns and drives.

What to confirm in a hazardous tree removal quote in Seattle

Quotes differ mostly in what they include. Ask each provider to put these in writing so you can compare like for like:

The defect the crew is responding to, in writing
Method: felling, rigging or crane, and why
Protecting the roof, fence or anything under the tree
Hauling and cleanup
Stump grinding
Utility coordination if lines are involved

Before you call about hazardous tree removal in Seattle

These answers let a provider in Seattle tell you on the first call what the job involves and roughly how it'll be done.

The defect you see: Crack, lean, fungus, cavity, hanging limb
Is it new?: A new lean or crack is more urgent
Soil at the base: Cracked or lifting on one side
What it could hit: House, drive, play area, lines
Access: Gate width, slope, what's under the canopy
Photos: Of the defect and the whole tree

Safety and permission checks

Power lines: stay at least 10 feet from overhead lines (OSHA's minimum distance for unqualified workers) and call the utility; only line-clearance-qualified tree workers cut closer.
Underground lines: call 811 a few days before stump grinding or digging so buried utilities are marked for free.
Permits: ask the city or county before removing or heavily pruning a large tree; protected-tree sizes and street-tree rules vary by place.
Who is responsible: a tree on your lot is usually yours, street (right-of-way) trees are usually the city's, and trees on lines are the utility's to clear.
Doing it yourself: picking up small fallen limbs is a homeowner job; chainsaw work off a ladder, near lines or on anything that could hit a building is not.

Have your answers ready? Call and we'll connect you with a provider serving your area.

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How getting hazardous tree removal in Seattle works

1
Tell us what's happening
Call and describe the tree, where it is and how urgent it is.
2
Get connected
Your call goes to an independent tree-service provider serving your area.
3
The tree is assessed
The provider looks at the tree, what's around it, and access for equipment.
4
Scope and price are discussed
You get the plan and price directly from the provider, before any work.
5
You decide
There's no obligation; you choose whether and when to go ahead.

TreeRemovalServices.net is a referral service and doesn't perform tree work. How it works

Local conditions

Local hazardous tree removal considerations in Seattle

What's specific to this work in Seattle: local storms, trees, access, rules and costs.

Seattle at a glance

Main hazard: Douglas-fir with root rot; windthrow on wet soil
Permit: Most trees 6 in. DBH+ need SDCI approval; hazardous-tree process exists
Season: October–March windstorms
Slopes: Environmentally critical areas add rules

Last updated October 3, 2026

Root rot: the hidden Seattle hazard

Laminated root rot and other root diseases weaken a conifer's anchorage with few signs above ground. A Douglas-fir can look healthy and still have a rotted root system, and it's the trees with root disease that uproot in the first big windstorm of the season. Signs include thinning, yellowing crowns, resin at the base, conks at the root flare and neighboring trees that have already fallen.

Looking straight up the trunks of very tall evergreen trees — Looking up the trunks of very tall evergreens.

Bigleaf maples and red alders

Douglas-firs get the attention, but bigleaf maples drop heavy limbs, often from decay at old wounds, and red alders are short-lived and fail as they age. Both are common in Seattle yards and greenbelts. A maple with a large cavity or an alder with a dead top near the house deserves the same assessment as a conifer.

Seattle's hazardous-tree process

Seattle's tree protection ordinance (SMC 25.11), in effect since July 30, 2023, regulates most trees 6 inches DBH and larger on private property, with replacement requirements and stricter limits on larger trees. Hazardous trees can be removed through a documented process, typically with an assessment by a qualified tree risk assessor. Steep slopes and other environmentally critical areas carry additional rules.

Neighbor's tree leaning toward your house

Seattle's big conifers often stand on one lot and lean over another. If a neighbor's tree looks hazardous, talk to them first and put your concern in writing with photos. A qualified tree risk assessment helps both owners decide. The hazardous-tree process under the city code applies to whoever owns the tree.

Hazard trees: what you can do

Safe for a homeowner

Keep people, pets and cars out of the area the tree could reach, roughly its height in every direction.
Photograph the defect now and over the following weeks; changes help an arborist judge urgency.
Call your electric utility if the tree threatens power lines.
Tell your neighbor in writing if the tree is on your property and could fall onto theirs.

Leave these to professionals

Don't climb or cut a cracked, leaning or decayed tree yourself; it can fail without warning when cut.
Don't pile soil or park vehicles around the base of a leaning tree.
Don't wait through storm season if the tree can reach the house.

Taking down a tall conifer near a house

1
Assess the tree and its fall zone
The crew works out which way the tree or its parts could fail and what's in the way before anyone starts cutting.
2
Choose a method that doesn't rely on the defect
A cracked or decayed tree may not hold a climber's weight or rigging, so lifts and cranes are used to take it apart from outside the tree.
3
Make it safe in stages
The most dangerous parts, such as hanging limbs or the heavy side of a leaning tree, come off first to reduce the load.
4
Finish and clean up
The remaining trunk is taken down in sections, wood is hauled or left as agreed, and the stump is cut low or ground.

Arborist in an aerial lift cutting a tree beside houses, with brush piled below — An arborist working from an aerial lift beside houses. On a compromised tree, cutting from a lift avoids putting a climber's weight on the defect.

Drought dieback

Hot summers like the 2021 heat dome left western redcedar tops brown and bigleaf maples stressed. Dieback alone doesn't make a tree hazardous, but dead tops and dead limbs over houses do. A redcedar with a dead top can often be topped back by a climber rather than removed, if the rest is healthy.

Next steps in Seattle

Tree Risk Assessment
For the documented assessment the hazardous-tree process needs.
Large Tree Removal
For tall conifers between houses.
Storm Damage Tree Removal
If the tree has already failed.

Seattle hazardous tree questions

How do I know if my Douglas-fir has root rot?

Thinning or yellowing crown, resin at the base, conks at the root flare and nearby trees that have already fallen are signs. An arborist can confirm.

Can I remove a hazardous tree in Seattle without a permit?

Most trees 6 inches and larger need SDCI approval, but hazardous trees have their own documented process, usually with a qualified tree risk assessment.

When do Seattle trees fall most?

During October–March Pacific windstorms, especially after heavy rain has saturated the soil.

Is a Douglas-fir that started leaning after a windstorm an emergency?

If the lean is new and the soil is cracked or heaved on the far side, yes: the roots have failed. Keep people out of its reach and get it assessed immediately.

My redcedar has a dead top. Does it need to come down?

Not necessarily. If the rest is healthy, a climber can often remove the dead top.

Do steep slopes change the rules?

Yes. Environmentally critical areas, including steep slopes, carry additional rules for tree removal.

Who handles a tree on power lines in Seattle?

Seattle City Light, and 911 for sparks or fire.

How much does hazardous tree removal cost in Seattle?

Tall conifers between houses often need climbers and cranes; permit work adds time. See the tree removal cost factors.

Who removes hazardous trees near me in Seattle?

Insured local tree services with tree risk assessors. You can call us to reach an independent provider.

More tree services in Seattle

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Tree service areas near Seattle

Sources for the local facts on this page

Seattle SDCI: New tree protection code (2023) (checked 2026-10-03)
Seattle SDCI: Tip 242, tree protection (checked 2026-10-03)