Dead tree removal in Washington and Oregon

Why dead trees are different to take down

A climber’s whole system depends on live wood. The rope goes over a limb that has to hold a person plus a swinging log; the spurs bite into bark that has to stay attached to the trunk; the top is tied in to a stem that has to flex instead of snap. Dead wood does none of that reliably. Bark sloughs off, and the top can break at a rot pocket nobody can see from the ground.

Federal safety rules treat a standing dead tree as its own hazard class. OSHA’s logging standard defines a “snag” as any standing dead tree or portion of one, and a “danger tree” as a standing tree that is a hazard because of deterioration or damage to the roots, trunk, stem or limbs, or its lean. The rule is blunt: each danger tree, including snags, must be felled or removed using techniques that minimize employee exposure before work starts in the area (29 CFR 1910.266). Lake Oswego’s tree code reaches the same place from the other side, listing “brittle branches” among the signs of a dead or declining tree (LOC 55.02.042(3)).

Risk-rating systems agree. A Mississippi State University Extension worksheet scores likelihood of failure on a four-step scale and puts a standing dead tree with no other defects at “high”; a dead tree with decay or cracks, or dead broken limbs hanging in the crown, goes to “extreme,” the top step (MSU Extension P3717, 2025). That is the method, not a Northwest number, but it matches why crews price dead trees as the harder job.

In practice that means a crew will often refuse to climb a dead Douglas fir, and will quote a bucket truck if there is access or a crane if there is not. Both cost more than a climb.

Dead or just dormant: Northwest species

The question matters because cities write “dead” into their permit exemptions and may ask an arborist to confirm it. Portland’s code defines a dead tree as one that is dead or damaged beyond repair, or where not enough live tissue, leaves or branches exist to sustain life “as determined by an arborist,” and a dying tree as one in an advanced state of decline from disease, insects or rot that cannot be saved by reasonable treatment (PCC 11.80.020).

• Douglas fir and western redcedar are evergreen, so a brown crown is never dormancy. Redcedar dieback across western Washington and Oregon shows up as crown thinning, topkill and flagging; ODF, WA DNR and the US Forest Service ask people to report pockets of two or more mature trees with those symptoms (September 2022 alert). A single thinning cedar is often drought stress, not death. See western redcedar dieback.
• Bigleaf maple, Oregon ash and Oregon white oak are deciduous and leaf out late. A bare tree in April can be fine. Scratch a pencil-thick twig: green under the bark means alive; tan and dry, move down the branch and try again. Dead branches snap instead of bending.
• A dying ash is now a quarantine question. Emerald ash borer was confirmed in Washington, Yamhill, Marion, Clackamas and Multnomah counties in Oregon, with 2026 finds in Beaverton, Salem, Hillsboro and east Portland, and Washington’s first detection was confirmed at Hazel Dell in Clark County on August 19, 2026. Inside Oregon’s quarantine counties, ash logs, chips, stumps and hardwood firewood may leave only after an approved treatment, such as chipping to 1 inch or less, or under an ODA compliance agreement (OAR 603-052-1075; civil penalty up to $10,000). See EAB in Oregon and EAB in Washington.
• Arborvitae browning on the inside in late summer is “cedar flagging,” a normal shedding of older foliage that WSU says clears out with fall winds. Brown tips on the outside are a different problem.

A tree with fungal conks on the trunk may be fully green and still be structurally dead; that is a tree risk assessment question, not a leaf question. The International Society of Arboriculture’s owner checklist covers the same ground: large dead branches, detached branches hanging in the crown, loose bark, cracks, cavities and mushrooms at the base all mean the tree should be looked at by an ISA Certified Arborist, and ISA calls dead branches in the canopy probably the most obvious hazard, with the risk set by the branch’s size and how close it is to people or buildings (ISA, Recognizing Tree Risk, 2021).

How cities permit dead and dying trees

Dead trees still need the permit where the city regulates size, but they go through the quickest lane and usually skip public notice.

Elsewhere the pattern repeats. Shoreline exempts dead and imminent-hazard trees, and its checklist asks for an ISA tree risk assessment form from an ISA certified arborist (SMC 20.50.310); Bellevue still requires a clearing and grading permit, but a tree that a TRAQ-qualified tree professional rates hazardous (high or extreme risk) falls outside its annual removal limits and replanting rules (BCC 23.76.035; 23.76.060.G); Lynnwood exempts dead or diseased trees unless neglect caused it (LMC 17.15.150); Milwaukie handles dead, dying and hazardous trees under its no-notice Type A permit (MMC 16.32). The full city lists are in tree removal permits in Oregon and tree removal permits in Washington. Two cautions: a street tree is never exempt, and in Portland the replacement tree is still owed even though the permit is free.

Leave a snag where it is safe

Washington’s wildlife agency makes a case for not removing the whole tree. WDFW says more than 100 species of birds, mammals, reptiles and amphibians need snags for nesting, roosting, shelter and feeding, and nearly 45 species forage in them. Its size guidance: snags over 15 in in diameter and taller than 10 ft are the most useful, because a snag taller than 10 ft keeps cavity nesters out of reach of bears and weasels, and a 12 in-plus snag 15 ft or taller gives raptors a hunting perch.

The safety test is simple. WDFW’s advice is that trees leaning away from or downhill of structures and areas of human activity present little or no risk, and that if something must come off, a crew can remove only the dangerous sections rather than felling the tree. Hazard-tree guidance from extension foresters frames it the same way: a tree is only a hazard if there is a target, meaning a person or property it could hit, and a dead tree that threatens nothing can be left standing as a wildlife snag (Alabama Cooperative Extension, FOR-2175, 2025, cited for the method). A bucket truck or crane can top a dead fir at 15–20 ft and leave the rest standing. WDFW also describes making a wildlife tree from a live one: top a tree at least 12 in in diameter, leaving a stump at least 10 ft tall, and have the work done by an insured tree service that understands wildlife-tree creation. OSU Extension gives the same answer to a homeowner asking about tall oaks next to a house: reduce the height and remove the big limbs over the deck, and leave a standing trunk for habitat.

Oregon forest law shows how seriously the state takes dead wood: in harvest units over 25 acres, operators must leave at least two snags or green trees per acre, 30 ft tall and 11 in DBH or larger, plus two downed logs (ORS 527.676). A tall snag 60 ft from the house is habitat, not a liability.

What dead tree removal costs

Our model prices a standing removal by height with a three-person crew at $225 per crew-hour in Oregon and $210 in Washington; it has no “dead tree” discount, and a dead tree usually lands at the top of its height bracket or needs the crane add-on. Modeled estimate, not quotes (method).

Modeled estimate, not quotes (method). Add ×1.3 when the only way out is carrying pieces through a backyard, and ×1.25 when the trunk is within 10 ft of the house. A snag left at 15 ft usually costs less than a full removal because there is no stem to section below the cut and far less to chip. Stump grinding is a separate add-on at a modeled $4–$6 per inch of diameter with a $150 minimum. Full detail is on the tree removal cost page.

After the tree is down

• Firewood rules. Ash wood from Oregon’s five quarantine counties stays put unless it is chipped to one inch or smaller, kiln-dried and debarked, or heat-treated with ODA permission. Portland requires pruned or felled elm wood to be disposed of within 24 hours and bans storing elm as firewood, because of Dutch elm disease (PCC 11.60.060).
• The stump. Grinding is the default; full removal matters if the tree died of laminated root rot, since the fungus survives in the roots and stump. See stump removal vs grinding.
• Replanting. Portland’s tree-for-tree rule applies to Type A permits, and Lake Oswego waives replacement for dead trees outside sensitive areas. Replanting Douglas fir where one just died of root disease repeats the problem (laminated root rot).
• Who did the work. Oregon requires a CCB or LCB license for tree removal (ORS 701.005; ORS 671.525) and Washington requires L&I contractor registration (RCW 18.27.010). Check before paying: Oregon lookup, Washington lookup.

Back to the tree removal hub.

Related guides

• How to tell if a tree is dead: seven checks
• Mushrooms on trees: which fungi mean decay
• Lightning-struck tree: damage signs and survival