How to Vet a Tree Service (Licensing, Insurance, Red Flags)

Vetting a tree service comes down to five checks that take about fifteen minutes: verify an active C-61/D-49 Tree Service license on the CSLB website (required for any job of $1,000 or more), confirm general liability insurance and — critically — workers' compensation, ask whether an ISA Certified Arborist is involved for anything beyond routine cutting, get three written bids with identical scope, and walk away from the classic red flags: storm-season door-knockers, cash-only pricing, big up-front deposits, and anyone recommending tree topping. Price matters, but in a trade where a mistake puts a trunk through your roof or an uninsured injury on your homeowner's policy, the paperwork check is worth more than the cheapest number.

Two policies matter, and homeowners routinely check the wrong one hardest. General liability covers damage to your property. Workers' compensation covers injured workers — and in tree work, that is the policy whose absence can cost you your house.

• General liability (GL): pays when the crew drops a limb through your roof, crushes a fence, or flattens the neighbor's shed. Ask for a certificate of insurance (COI) issued by the insurer, not a photocopy the contractor hands you — you can request one naming you as certificate holder, which confirms the policy is live.
• Workers' comp (WC): pays when a worker is injured. Tree work means chainsaws at height, rigging under load, and chippers — it consistently ranks among the deadliest jobs tracked by federal labor statistics. Injuries are not rare edge cases in this trade.
• Why WC matters to YOU: if an uninsured worker is seriously hurt on your property, attorneys look for a payer — and homeowner's policies and personal assets are where those claims land. The few hundred dollars saved on an uninsured bid is not worth that exposure.
• The 'we're all owners' dodge: sole owners can legally be exempt from carrying comp on themselves. That can be legitimate for a one-person stump grinder; it does not add up when four guys show up with a chip truck. The CSLB lookup shows the comp status — check it against the crew size you see.
• Bond vs. insurance: the contractor's license bond is a consumer-protection backstop, not real coverage. It will not rebuild a roof. You want the actual GL and WC policies.

Most tree-service horror stories start the same few ways. These are the patterns worth walking away from, no matter how good the price sounds.

• Storm door-knockers. After a Sacramento windstorm, crews cruise damaged neighborhoods offering to start 'right now.' Some are legitimate; many are unlicensed, uninsured, and gone by the weekend. Real companies are busy after storms — the crew with nothing booked, knocking on doors, is telling you something.
• Cash only, or a big deposit up front. California caps home-improvement down payments at $1,000 or 10 percent, whichever is less. Demands for hundreds in cash before work starts, or 'a discount if there's no paperwork,' remove every protection you have.
• Topping pushers. Anyone recommending topping — shearing the whole canopy flat — is advertising that they do not know trees. Topping violates ANSI A300 pruning standards, forces weakly attached regrowth, invites decay, and makes the tree more dangerous within a few seasons. It is the single most reliable competence filter in this trade.
• No written anything. No written bid, no contract, no license number on the paperwork or the truck. Advertising contractors must display their license number — its absence is not an oversight.
• Spike marks on trim jobs. Climbing spurs are for removals. A climber spiking a tree that is staying puts a wound column down the trunk. Ask how they climb for pruning; the answer should involve ropes, not spikes.
• Pressure tactics. 'This price is only good today' and 'that tree could fall any minute' are sales scripts. Genuinely imminent hazards exist — but a professional documents the hazard and still puts the price in writing.
• No permit talk. In the City of Sacramento and much of the region, heritage trees, street trees, and protected native oaks need permits before removal. A contractor who shrugs at the permit question is leaving the code violation — and the fine — with you, the owner.

Five minutes of direct questions separates professionals from pretenders faster than any website does. Good companies answer these without flinching. 916 Trees is happy to be vetted this way — it is exactly how we would hire in this trade. If you are pricing a removal or a season of trimming anywhere in the Sacramento region, estimates are free, written, and site-specific, and we will flag the permit question before you owe anyone anything.

• “What's your CSLB license number, and is it D-49?” — then actually look it up at cslb.ca.gov.
• “Can your insurer send me a certificate of insurance for GL and workers' comp?” — the request itself filters out the uninsured.
• “Who will assess the tree, and are they an ISA Certified Arborist?” — matters most for health calls, oaks, and permit reports.
• “Does this tree need a permit, and who handles that?” — in Sacramento, the wrong answer here becomes your fine.
• “How will you protect the lawn, irrigation, and driveway, and what happens if something gets damaged?”
• “Is the stump, haul-off, and cleanup in this number?” — get the yes in writing on the bid.
• “How do you take payment?” — completion or a lawful small deposit, by check or card. Cash-up-front ends the conversation.