How to Hire a Tree Care Professional

ISA certification, insurance requirements, red flags, and what to ask before anyone touches your trees

Why Credentials Matter for Tree Work

Tree care is one of the most dangerous occupations in America. It's also one of the least regulated. In most states, anyone with a truck and a chainsaw can call themselves a tree service. There's no licensing exam, no required training, and no mandatory insurance.

This means the difference between a qualified arborist and someone who will destroy your tree and possibly your property comes down to credentials you have to verify yourself. A bad pruning job doesn't just look ugly. It creates structural problems that compound over decades. A topped tree becomes more dangerous, not less. An improper removal can drop a limb through your roof. An uninsured worker injured on your property can sue you.

The 15 minutes you spend checking credentials before hiring will save you thousands in damage, liability, and corrective work.

What ISA Certification Actually Means

The International Society of Arboriculture (ISA) certification is the closest thing the tree care industry has to a professional license. To earn it, an arborist must pass a comprehensive exam covering tree biology, diagnosis, pruning, safety, soil science, and pest management. They must also document three or more years of full-time experience in arboriculture.

ISA Certified Arborists must earn continuing education credits to maintain their certification. This means they're required to stay current on research, techniques, and emerging threats.

ISA certification alone doesn't guarantee good work. But its absence is a reliable red flag. If someone working on mature trees near structures can't demonstrate ISA certification, look elsewhere.

You can verify any arborist's certification at the ISA website (treesaregood.org). The certification number should be on their business card, estimate, and vehicle.

Insurance: The Non-Negotiable

A reputable tree care company carries two types of insurance:

General liability insurance: covers damage to your property (if a limb falls on your car, if equipment damages your driveway, if a tree falls on your neighbor's fence). The USDA Tree Owner's Manual recommends minimum coverage of $1 million per occurrence and $2 million aggregate.

Workers' compensation insurance: covers injuries to the tree company's employees while working on your property. Without this, if a climber falls and is injured at your home, you could be held liable for their medical costs.

Request certificates of insurance. Then call the insurance company directly to verify the policy is current. Some contractors carry insurance only when they know someone will check, or let policies lapse between renewals.

If a company can't provide proof of both general liability and workers' comp, do not hire them regardless of how good their price looks.

Red Flags That Should End the Conversation

They recommend topping. Any company that suggests cutting the main trunk or large branches back to stubs doesn't understand basic tree biology. Topping is condemned by every major arboriculture organization. It creates a more dangerous tree within 3-5 years.

They use climbing spikes on trees that aren't being removed. Spikes puncture the bark and cambium layer with every step, creating dozens of wounds. Spikes are for removal only. Never for pruning or health work.

They go door to door after storms. Storm chasers appear in neighborhoods after major weather events, offer cheap "emergency" work, do a terrible job, and disappear before you can complain. They're often uninsured and unlicensed.

They want full payment upfront. Legitimate companies may request a deposit for large jobs, but full payment before work begins is a scam indicator.

They recommend wound dressing or tree paint. Research has shown for decades that wound dressings don't help healing and can actually trap moisture and promote decay. Any company recommending them is working from outdated practices.

They can't provide references. An established company should be able to connect you with recent customers in your area.

What to Ask Before Hiring

Get at least 2-3 written estimates for any significant tree work. A written estimate should include the scope of work (which trees, what type of pruning, what's being removed), the timeline, the total cost, and what happens to the debris.

Questions to ask every company:

Are you ISA certified? Can I see the certification? (Verify at treesaregood.org)

Do you carry general liability and workers' compensation insurance? Can I have a copy of the certificates?

Who will be doing the actual work? The person who gives the estimate may not be the person who shows up with a chainsaw. Ask whether the crew includes ISA-certified climbers.

What specifically will you do to my tree? "We'll trim it up" is not an answer. You want specific pruning objectives: crown cleaning to remove deadwood, reduction of a specific limb, removal of a specific hazard.

Will you follow ANSI A300 pruning standards? This is the national standard for tree care. A qualified company knows what this is and follows it.

What equipment will you use? Bucket trucks, chippers, stump grinders, and cranes should all be discussed upfront so you know what's driving on your lawn.

Do you clean up and remove all debris? This should be included in the price. Confirm whether stump grinding is included or extra.

What Things Should Cost

Tree care pricing varies dramatically by region, tree size, access, and complexity. These ranges are approximate:

Pruning a medium shade tree (30-60 feet): $300-$1,000 depending on crown density and amount of work needed.

Removing a medium tree: $800-$3,000 depending on proximity to structures and access.

Removing a large tree near a house: $2,000-$10,000+. The proximity to structures is the main cost driver because it requires sectional removal (cutting pieces and lowering them on ropes).

Stump grinding: $150-$500 per stump depending on diameter.

Emergency storm response: expect 50-100% premium over scheduled rates.

If an estimate is dramatically lower than the others, ask why. The answer is usually less insurance, less experienced crew, or less careful work. The cheapest bid on tree work is almost never the best value.