How to Start a Tree Service Company in Washington

Short answer: To start a tree service company in Washington, get your UBI first, then register with L&I as a specialty contractor with a $15,000 bond and carry liability insurance of at least $250,000 combined single limit. Tree work is high risk, so treat the state minimum as a floor.

Updated October 12, 2026. Requirements and fees change; confirm with the agency named on this page.

Washington is one of the most tree-heavy states in the country, and that means steady work for tree removal, pruning, storm cleanup, and land clearing. Windstorms alone generate a wave of emergency calls every year, and homeowners pay well for a crew that can safely take down a hazard tree or clear a fallen limb off a roof. If you can run a saw and manage a crew safely, the demand is real and it does not slow down for long.

Tree service also carries more real risk than most trades, working at height, near power lines, and around heavy falling loads, which means the legal and insurance side of starting this business deserves extra attention, not less. Getting set up to legally advertise and bid tree work in Washington means moving through business formation, a state ID number, bonding, insurance, and contractor registration, in a specific order. Get that order wrong and you lose time, or worse, you find yourself underinsured for the actual risk of the work. Almost everyone who looks into "starting a tree service business" stalls at this stage, not because the steps are individually hard, but because nobody lays out the order or the safety stakes clearly.

Here is that order.

Want the tree-service-specific sequence, including the insurance and safety pieces that matter most? Build your free Contractor Lane roadmap.

What stands between you and your first tree service job

A name and a business structure. Confirm your business name is available in Washington and choose your legal structure, most commonly an LLC. This affects your taxes and, importantly for tree work, your personal liability exposure if a removal damages a structure, a power line, or a neighboring property, which happens more often in this trade than in lower-risk work.

Your UBI number and state business license. Apply through Washington's Business Licensing Service for your nine-digit Unified Business Identifier, the number every later step depends on. The base license application runs roughly $50, more with certain endorsements. Getting the contracting category correct here avoids delays down the line.

Your contractor bond. Washington requires a surety bond before L&I will register your business. Tree service companies register as a specialty contractor, requiring a $15,000 bond, compared to $30,000 for general contractors offering more than one trade. The bond amount is the coverage available to a wronged customer, not a payment you make directly. Your actual cost is a modest annual premium based on your credit, and an assignment of account can substitute for a bond in some cases. Registering under the wrong type is a costly and common mistake.

Your liability insurance, sized for real risk. Washington's minimum general liability requirement before registration is $200,000 public liability and $50,000 property damage, or $250,000 combined single limit. Treat that minimum as a floor, not a target. Tree work involves falling limbs and trunks, chainsaws, chippers, and frequent proximity to power lines, roofs, fences, and vehicles, and a single bad outcome can be catastrophic. Many tree service owners carry higher limits than the state minimum once they understand the actual exposure, and getting properly insured, not just legally compliant, should be treated as a real business decision, not paperwork to rush through.

L&I contractor registration. With your UBI, bond, and insurance in place, you file a notarized contractor registration application and pay a $150.20 fee. You cannot legally advertise or bid tree service work in Washington until this registration clears. One missing detail on the notarized application sends the whole file back, and during storm season that delay can mean missing the exact window when demand is highest.

The tree-service-specific licensing and safety note. Tree service does not require a separate trade exam or license beyond L&I contractor registration. Washington recognizes 63 specialty contractor categories plus general contracting, and tree service falls under a specialty registration with no additional testing required. That said, this is a trade where safety training and credentials genuinely matter for winning business and staying alive on the job, even where the state does not mandate them. Work involving power line proximity often requires coordination with the utility, and clients increasingly expect proof of proper equipment, crew training, and insurance before they will let a crew near their property. Contractor Lane maps out exactly what applies to your registration and what additional credentials strengthen your bids.

Taxes and hiring a crew. Washington has no personal income tax, but your business owes Business and Occupation tax on gross receipts. Tree work is rarely a one-person job for long, and the moment you bring on a climber or ground crew, you take on workers' compensation through L&I, unemployment insurance, and Paid Family and Medical Leave, with workers' comp rated at a genuinely higher premium given the risk classification of tree work.

Getting your first customers. Legally registered does not mean booked. A free Google Business Profile is the single highest-leverage move a new tree service company can make, since homeowners facing a hazard tree or storm damage search locally and urgently. Bing Places is another fast, free addition. A simple page with your name, service area, phone number, photos of completed removals, and a way to request a quote outperforms an expensive website when you are just starting out, especially if it makes calling you easy during an emergency.

Why most people stall

Every step here is manageable alone, but the order and the traps are what actually stop people. Buying a bond before your UBI exists wastes a step. Registering under the wrong contracting type throws off your required bond amount. Treating the state insurance minimum as adequate coverage for the real risk of tree work is a mistake that can end a business the first time something goes wrong. One missing detail on a notarized L&I application costs real weeks, often during storm season when the calls are coming in. And plenty of skilled climbers get registered with no real plan for pricing jobs safely or profitably.

This is exactly the gap Contractor Lane closes. One ordered path built for tree service, with the safety and insurance stakes flagged clearly, instead of piecing it together from scattered searches.

Where Contractor Lane comes in

Contractor Lane is the front door for starting a tree service company in Washington, built to reach you at the very beginning, before the accounting software and lead-selling platforms start competing for your attention. We lay out the entire path in the correct order: business setup, your UBI and license, the right bond amount for your registration type, properly sized insurance, and L&I contractor registration, with the safety and liability traps specific to tree work flagged clearly before they cost you.

Once registered, the free roadmap builder helps you keep moving in the right order, including the higher insurance and workers' comp issues this trade can carry. When you want more hands-on help getting from registered to booked, the paid Startup Roadmap is there for guided support.

Stop trying to assemble this from government forms and forum threads that were not written for tree service owners. Build your free Contractor Lane roadmap and get the exact Washington tree-service-company launch path, in order, with the startup roadmap tools included from the start.

Get started with Contractor Lane today and take the first real step toward your first paying tree service job.

General educational information for people starting a business in Washington. Requirements and fees change. Contractor Lane is not a law firm or tax advisor.