Washington
Tree Removal and Tree Service in Washington
Western Washington's tree failures happen mostly between November and February, when Pacific windstorms arrive after weeks of rain. The trees involved are big. Douglas-firs and cedars of 100 feet and more stand in ordinary backyards.
Why do so many trees fall in Western Washington winters?
Saturated soil and strong wind arrive together. By late fall the ground has absorbed weeks of rain, root grip is at its weakest, and that is when the biggest storms of the year come through.
- Soil
- Much of the Puget lowland has a dense glacial layer a few feet down. Water perches on it and roots stay above it.
- Wind direction
- Most storms blow from the south and southwest, and trees are braced for that. The November 2024 bomb cyclone drove strong winds from the east, and trees fell that had stood through decades of ordinary storms.
- Evergreen crowns
- Conifers hold their needles all winter and present a full sail to the wind.
- Root disease
- Laminated root rot and Armillaria weaken roots out of sight.
Native trees and how they come down
- Douglas-fir
- The dominant tree. Wind-firm when healthy and grown in the open. Vulnerable to laminated root rot and to sudden exposure when neighboring trees are cleared.
- Western redcedar
- Tends to shed tops and limbs more than uproot. Has been dying back in drier summers.
- Western hemlock
- Shallow-rooted and prone to root and butt rot. Among the more failure-prone conifers.
- Bigleaf maple
- Massive limbs with frequent decay. Drops large branches and splits at old wounds.
- Red alder
- Short-lived, often declining by 50 to 70 years. Snaps and rots quickly.
- Black cottonwood
- Very large, with brittle wood. Common along streams and wet ground.
Signs of root rot in conifers
Root disease is the hidden factor in many blowdowns. From the ground, look for these.
Thin, yellowing crown
Shorter needles and reduced top growth compared with neighboring trees.
Heavy cone crops
A stressed tree may produce an unusual number of small cones.
Dead or fallen trees nearby
Root rot spreads through root contact and kills in slowly expanding pockets.
Resin at the base
Pitch flow near the root collar, or mushrooms and conks at the base in fall.
Roots that snap short
A fallen tree with a small, broken-off root ball and stringy or layered wood.
The tall fir beside the house
The question arborists hear most here is whether a 120-foot Douglas-fir near a bedroom should be removed. Most of the time the honest answer is that a healthy fir is a low-risk tree. These trees evolved with the storms.
Risk goes up in specific cases: signs of root disease, a recent change in exposure such as a cleared lot next door, roots cut for a driveway or utility trench, a new lean, or soil that stays waterlogged. A stand that has lost trees to root rot should be evaluated as a group.
Two things do not help. Topping a conifer causes decay and weakly attached new tops. Heavy "windsail" thinning removes the inner branches that dampen sway and is not supported by current pruning standards. If the tree worries you, a risk assessment gives a clearer answer than either.
Tree rules in Washington
There is no single state permit for removing trees on residential lots. Cities and counties regulate, often through critical areas rules that restrict cutting on steep slopes, near streams and wetlands and along shorelines.
Seattle's tree code, updated in 2023, sorts trees into four tiers by size and status and limits removal of each. Tree service providers working in the city must be on the Seattle Department of Construction and Inspections registry. See the Seattle page.
Suburban cities such as Bellevue, Kirkland, Redmond and Tacoma each have separate ordinances. Check with your city's permit office before removing any significant tree.
The Western Washington tree year
| Months | Conditions | Typical tree work |
|---|---|---|
| November to February | Saturated soil, windstorms, occasional heavy wet snow | Emergency removals, blowdown cleanup, hanger removal |
| March to May | Soil still wet. Growth begins. | Post-storm assessments, planned removals, pruning |
| June to September | Dry summers. Drought stress on cedar and hemlock. | Dead tree removal, deadwood pruning, best equipment access |
| October | First rains and wind | Last chance for preventive work before storm season |
Washington tree service questions
Is it legal to top a tree in Washington?
State law does not ban it, but many city codes, including Seattle's, treat topping of regulated trees as prohibited removal. It also damages the tree. Crown reduction or removal are the legitimate options.
Can I remove a tree to improve my view?
That depends on the city, the size of the tree and whether it sits on a slope or shoreline. In Seattle, removal of larger trees on developed lots is tightly limited. Check before cutting, since fines can be substantial.
When is the best time to remove a tree here?
Late spring through early fall gives firm ground and easy access. Hazard trees should not wait for good weather.
My neighbor cleared their lot. Are my trees at risk now?
Possibly. Trees that grew sheltered inside a stand have narrower crowns and less taper, and they can be vulnerable when suddenly exposed. An assessment before winter is reasonable.
Tree service in Washington, by phone
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