Tree Services
Tree Removal
Whether a tree is damaged, dead, or a safety hazard, our crews ensure safe and efficient removal with minimal disruption to your property.
Learn more →Mercer Island's Expert Arborists
Local, expert tree care for Mercer Island's shoreline and hillside lots, from removals and structural pruning to 24/7 storm response, backed by written estimates and full insurance.
99% recommended
Why Mercer Island
Local tree care for Mercer Island.
Serving Mercer Island, Washington through our Seattle crew, with the same expert arborists, the same standards, and the same around the clock availability.
What we do
Tree care in Mercer Island, made easy.
Tree Services
Tree Trimming & Pruning
Keep your trees safe, structured, and looking right. We remove dead or overgrown branches, improve clearance, and reduce storm risk.
Learn more →Tree Services
Emergency & Storm Damage
When storms cause tree damage, our emergency team responds quickly to remove hazards, clear debris, and restore safety.
Learn more →Tree Services
WindReady™ Storm Prep
Strategic pruning, cabling, and bracing to reduce storm damage risks before severe weather hits.
Learn more →Tree Services
Safety & Risk Assessments
Identifying potential hazards before they become problems. Tree stability, structural integrity, and surrounding risks evaluated on-site.
Learn more →Tree Services
Virtual Consulting & Estimates
Get expert arborist guidance without a site visit. Share photos or video of your trees and receive a written assessment and estimate within 24 hours.
Learn more →Commercial
Multi-Location Management
Simplify tree care across multiple properties with a single, trusted provider. Consistent maintenance and emergency response.
Learn more →Commercial
HOA & Property Management
One point of contact for the whole community: scheduled rounds, board-friendly reports, and uniform standards across every lot.
Learn more →Commercial
Municipal Tree Care
ROW maintenance, public works contracts, and storm response for city forestry teams. We handle permits and traffic plans.
Learn more →Commercial
Fortune-500 Grounds
Corporate campuses, hospital systems, and headquarters landscapes. Quarterly walks, annual risk reports, COIs on file.
Learn more →Commercial
Commercial Emergency Response
Under 2-hour dispatch to any property in our service area. Liability coverage and safety plans on file with your operations team.
Learn more →Commercial
Property Tree Inventory
A geotagged inventory of every tree on the property: species, age, condition, and recommended work, refreshed annually.
Learn more →What people are saying
Rated 4.9 stars across 140+ reviews.
Real reviews from real customers, straight from our Google Business Profile. Here's what people say once the crew has packed up and the yard is clean.
JB
★★★★★
March 11th, a brief but strong storm came through Goodlettsville and blew over two giant trees in my front yard; one which was being supported by a 3rd tree that was facing and threatening my house. It was an…
Julie Bangs●3 days ago
JM
★★★★★
From the time I inquired w this company about removing a tree that was strongly impacted from the major strong 80 mph winds on March 3, 2023, they provided us w exceptional service in every way . They were…
Jeanne Mason●3 weeks ago
GH
★★★★★
CATS crew was amazing across the board from Mike & Lisa & Joe to the crew that came to our house. The consultation was easy and informative and made me feel comfortable in choosing them. The price was less…
Guy Hunt●1 month ago
Local expertise
Why an Expert Arborist Matters in Mercer Island
Mercer Island sits entirely within Lake Washington in King County, connected to Bellevue and Seattle by bridge but surrounded on every side by water. That geography changes how trees behave here compared to inland Eastside neighborhoods. Soil across the island tends to stay saturated longer into spring, and wind sweeping across open water hits shoreline trees with less obstruction than a tree set back a quarter mile from the lake.
Mature Douglas fir and western hemlock line much of the island’s hillside interior, and those trees carry laminated root rot risk just like anywhere else in King County, but the added moisture from being surrounded by the lake means root systems here rarely get a true dry stretch to recover. An arborist working Mercer Island has to weigh shoreline wind exposure and island wide soil saturation together. We produce written, TRAQ qualified risk assessments accepted by HOAs, insurance carriers, and legal counsel, and every crew carries full general liability and workers’ compensation insurance.
Mercer Island’s Tree Challenges
Mercer Island’s shoreline lots face the most direct wind exposure of anywhere in the Seattle market, since there is open water on every side of the island rather than just one direction. A tall Douglas fir or western hemlock weakened by laminated root rot on a lakefront lot can go over in a windstorm that a more sheltered inland tree would survive without issue.
Interior, hillside lots deal with a slightly different mix. Retained conifers there face the same regional root rot and windthrow risk, while ornamental plantings like European birch and flowering cherry, common across the island’s residential streets, carry their own separate concerns from borer damage and wet snow loading. An expert arborist accounts for how exposed or sheltered a given Mercer Island lot actually is before recommending a plan, since two trees a few blocks apart here can face very different conditions.
Service area
Our Seattle service area.
Mercer Island is in the Seattle service area. Calls route through national intake until local coverage is verified.
Areas we cover
Click an area to learn more about our work there.
- Seattle
- Bothell
- Shoreline
- Kenmore
- Lake Forest Park
- Mercer Island
- Kirkland
- Bryn Mawr-Skyway
- Newcastle
- Burien
- Tukwila
Mercer Island FAQ
Local questions, local answers.
Don't see your question? Call us. Every call is answered by a human arborist, day or night.
Do you serve Mercer Island, WA?
Yes. The Certified Arborist Tree Service works throughout Mercer Island, from the shoreline up to the hillside interior of the island. Call for a free on-site estimate.
How fast can an arborist get to my property?
Most estimate visits happen within 24 hours, and storm emergencies get a crew on site the same day. We answer the phone around the clock, not a call center.
Is being surrounded by Lake Washington a factor for tree health?
It is. Mercer Island sits entirely within Lake Washington, so soil across the island tends to stay wetter longer than inland King County lots, and wind moving unobstructed across open water can hit shoreline trees harder than trees set back from the water.
What tree problems are most common here?
In this region the ones we see most are laminated root rot, bronze birch borer, and windthrow of tall conifers once winter rain saturates the soil. An arborist can tell you which apply to your specific trees.
Are you licensed and insured?
Yes. We carry full general liability and workers' compensation coverage on every crew member, and can email a current Certificate of Insurance before work begins.
Take back your trees today
One expert arborist. Every tree on your property.
Free estimate. Twenty-four-hour response. No contracts. No commitments.
Or call (844) 835-8733, answered 24/7 by a human.
