What is a hazard tree assessment?

A hazard tree assessment is a professional evaluation of a tree's structural integrity, health, and surrounding conditions to determine whether it poses a risk of failure that could damage property or injure people. Our experienced crew inspects the trunk, roots, canopy, and soil to identify warning signs that most homeowners would miss. The assessment results in clear recommendations — monitor, prune, or remove — so you can take action before a problem becomes an emergency.

How much does a hazard tree assessment cost?

K&J Tree Works provides free hazard tree assessments as part of our on-site estimate process. When we visit your property, we evaluate each tree of concern at no charge and provide honest recommendations. If removal or pruning is needed, we include a detailed quote for the recommended work. There is no obligation — our goal is to help you understand the risks and make an informed decision.

What are the signs of a hazardous tree?

Common warning signs include a noticeable lean that has developed or increased, large dead branches in the upper canopy, visible trunk cracks or cavities, fungal growth (mushrooms or conks) at the base or on the trunk, exposed or heaving roots, bark falling off in large sections, and a sparse or one-sided canopy. Trees near structures, power lines, or high-traffic areas deserve extra attention. If you notice any of these signs, schedule an assessment before the next storm season.

How often should I have my trees assessed?

We recommend a professional assessment every 2-3 years for mature trees, especially those near your home, driveway, or power lines. Trees should also be assessed after major storms, during drought conditions, or whenever you notice new signs of decline. Properties in heavily wooded areas or on slopes benefit from more frequent evaluations due to the increased risk from wind exposure and soil saturation.

Can a hazardous tree be saved instead of removed?

In many cases, yes. Not every tree that shows warning signs needs to be removed. Options include crown thinning to reduce wind load, deadwood removal to eliminate falling branch hazards, and structural pruning to improve weight distribution. However, trees with significant trunk decay, advanced root rot, or severe structural defects often cannot be made safe through pruning alone. We'll give you an honest assessment of whether the tree can be preserved or needs to come down.

Hazard Tree Assessment Snohomish & King County, WA

A hazard tree assessment is a professional evaluation of a tree's structural integrity, root stability, and surrounding conditions to determine whether it poses a risk of failure that could cause property damage or personal injury.

Professional hazard tree assessment and risk evaluation across Snohomish County and King County, WA. Identify dangerous trees before they fail and protect your property, family, and neighbors.

The Pacific Northwest's unique climate creates conditions that increase tree failure risk compared to other regions. Heavy rainfall saturates soil and weakens root systems, especially on slopes. Powerful atmospheric river events and windstorms generate extreme forces on tall, dense canopies. Douglas Firs, Western Red Cedars, and Big Leaf Maples grow to enormous heights in our mild, wet climate — but that rapid growth can hide structural defects that only become apparent during a major weather event. Root rot fungi like Armillaria and Phellinus thrive in our moist conditions, silently compromising trees from underground. Regular professional assessments are the best way to catch these issues before they turn into costly emergencies.

Many of these hidden dangers inside dying trees are invisible to homeowners until it's too late. A professional assessment catches these problems early — before a tree falls on your house, car, or family.

Key Facts

Free on-site hazard tree assessments with every estimate
Evaluates trunk integrity, root stability, canopy health, and lean
Options include monitoring, pruning to reduce risk, or full removal
Recommended every 2–3 years for mature trees near structures
Schedule before storm season (Oct–Mar) for the best protection

Hazard Tree Assessment Cost

Service	Price Range
Single tree assessment with estimate	Free
Hazard pruning (single tree)	$300–$1,500
Hazardous tree removal (small–medium)	$500–$3,500
Hazardous tree removal (large/complex)	$3,500–$10,000+

Hazard tree assessments are free — we evaluate your trees and provide honest recommendations at no cost. If work is needed, pricing depends on the tree's size, condition, location, and the type of work recommended. Contact us for a free on-site evaluation.

How Hazard Tree Assessment Works

Schedule Your Assessment: Call us or submit a contact form describing your concerns. We'll schedule a convenient time to visit your property and evaluate the tree or trees in question.
On-Site Visual Inspection: Our experienced crew leader walks your property and inspects each tree of concern — evaluating trunk condition, canopy health, root stability, lean, soil conditions, and proximity to structures and utilities.
Risk Evaluation: We assess the likelihood of tree failure and the potential consequences — considering what the tree could hit if it fell, including your home, garage, fence, driveway, or neighboring property.
Written Recommendations: You receive clear, honest recommendations for each tree: monitor, prune to reduce risk, or remove. We explain our reasoning in plain language so you can make an informed decision.
Action Plan: If any trees need immediate attention, we provide a detailed quote for the recommended work — whether it's targeted pruning to reduce wind load, cabling for structural support, or full removal.

Frequently Asked Questions About Hazard Tree Assessment

What is a hazard tree assessment?: A hazard tree assessment is a professional evaluation of a tree's structural integrity, health, and surrounding conditions to determine whether it poses a risk of failure that could damage property or injure people. Our experienced crew inspects the trunk, roots, canopy, and soil to identify warning signs that most homeowners would miss. The assessment results in clear recommendations — monitor, prune, or remove — so you can take action before a problem becomes an emergency.
How much does a hazard tree assessment cost?: K&J Tree Works provides free hazard tree assessments as part of our on-site estimate process. When we visit your property, we evaluate each tree of concern at no charge and provide honest recommendations. If removal or pruning is needed, we include a detailed quote for the recommended work. There is no obligation — our goal is to help you understand the risks and make an informed decision.
What are the signs of a hazardous tree?: Common warning signs include a noticeable lean that has developed or increased, large dead branches in the upper canopy, visible trunk cracks or cavities, fungal growth (mushrooms or conks) at the base or on the trunk, exposed or heaving roots, bark falling off in large sections, and a sparse or one-sided canopy. Trees near structures, power lines, or high-traffic areas deserve extra attention. If you notice any of these signs, schedule an assessment before the next storm season.
How often should I have my trees assessed?: We recommend a professional assessment every 2-3 years for mature trees, especially those near your home, driveway, or power lines. Trees should also be assessed after major storms, during drought conditions, or whenever you notice new signs of decline. Properties in heavily wooded areas or on slopes benefit from more frequent evaluations due to the increased risk from wind exposure and soil saturation.
Can a hazardous tree be saved instead of removed?: In many cases, yes. Not every tree that shows warning signs needs to be removed. Options include crown thinning to reduce wind load, deadwood removal to eliminate falling branch hazards, and structural pruning to improve weight distribution. However, trees with significant trunk decay, advanced root rot, or severe structural defects often cannot be made safe through pruning alone. We'll give you an honest assessment of whether the tree can be preserved or needs to come down.

Service Areas for Hazard Tree Assessment

We provide hazard tree assessment across 24 cities in Snohomish County and King County, WA.

Other Services

What Our Customers Say

I recently had K&J Tree Works remove 22 large cottonwood trees from my property, and I couldn't be more impressed with their work! From the initial consultation to the final cleanup, the team was professional, efficient, and incredibly skilled. They tackled the job with precision, taking extra care to ensure the trees were removed safely and with minimal disruption to the surrounding area. The crew worked quickly, and they left my yard spotless when the job was done – no debris or mess left behind! I highly recommend K&J Tree Works for any tree removal needs. Their expertise, great customer service, and attention to detail made this a stress-free experience. I will definitely be calling them for any future tree care needs! Thank you, K&J Tree Works, for an amazing job!

— Shane Johnson, Monroe, WA

Robert and his team at K&J did an outstanding job with our tree removal and trimming project. We had a highly technical situation, as most of the branches and tree sections couldn't simply be dropped—they needed to be carefully lowered in a controlled manner. From the initial consultation, Robert provided a clear, safe, and detailed plan that put us at ease. The execution was flawless—the job went exactly as planned, completed within the promised timeframe. They also left our yard in better condition than when they arrived, with everything cleaned up perfectly. And considering the complexity of the work, the pricing was very reasonable. We're extremely grateful for their professionalism and expertise. Thank you, Robert and team! I plan to hire K&J for all my tree services going forward.

— Alisa Shtromberg, Bothell, WA

Robert with K&J Tree Works was amazing and receives 5 stars from me on every account. I was recommended to him by a friend and when I reached out he was very quick to respond. Scheduling the estimate was easy and Robert was even willing to expedite my initial visit if there was urgency (I had a fallen tree hanging over my house). The bid was very reasonable and his assessment of how to accomplish the complicated task was well thought out. They arrived to complete the work at the time agreed upon and made short work of the project and left the property spotless. I would work with Robert again without reservation and recommend him to any friend who is in need of tree services.

— Vincent Martinez, Edmonds, WA

Browse our project photo gallery to see examples of completed hazard tree assessment projects. Watch our crew at work to see our techniques in action.

Get a Free Hazard Tree Assessment Estimate

Serving Snohomish County and King County, WA. Monday–Saturday, 8am–5pm.

Request Free Estimate | (425) 223-7904

Schedule your assessment before PNW storm season (October–March) — catching hazard trees early prevents costly emergency situations.

Meet our team | Read customer reviews | Watch our team in action