1. Define the job before comparing companies
Mark the exact trees or branches and describe the desired result. Note buildings, fences, streets, slopes, septic areas, landscape features, pets, utility lines and access limitations. Send the same basic description to each bidder so the responses are comparable.
2. Request a written estimate
The estimate should name the provider, job location, work items, exclusions, cleanup, equipment access, start or scheduling terms, price, payment terms and change-order process. For removals, clarify stump work and debris. For pruning, specify the objective rather than accepting “trim as needed.” Never sign a blank or materially incomplete proposal.
3. Verify insurance directly
Do not rely on a website phrase or an undated image. Ask for a current certificate and contact the listed insurance agent or carrier to confirm the policy status, applicable coverage and business name. Ask specifically about general liability and workers' compensation as appropriate to the crew and job. A directory listing does not verify insurance.
4. Check the people and credentials
Ask who will assess the tree, supervise the crew and perform climbing or equipment work. If an ISA credential is relevant, get the individual's name and verify it through the official ISA tool. Company statements about “certified arborists” do not show which credentialed individual will be involved in your project.
5. Ask how hazards will be controlled
- How will the work zone be isolated from people, vehicles and neighbors?
- Who coordinates electrical or communication lines?
- What protects the driveway, lawn, septic field and structures?
- Will traffic or sidewalk control be needed?
- What is the plan if the actual condition differs from the estimate?
- Who is responsible for permits or City contact for a public tree?
Do not enter an active drop zone. A low bid is not a reason to accept unclear line work, unprotected access or an improvised rigging plan.
6. Confirm local and regulatory details
Check current business and contractor requirements for the actual scope rather than assuming a tree-service label answers every licensing question. Tennessee's contractor licensing rules depend on project value and type; local rules and permits can also apply. For trees in a Knoxville public right-of-way, consult City Urban Forestry. For electric-line conflict, start with KUB or the responsible utility.
7. Evaluate the contract, not online popularity
Reviews can describe experiences but do not replace current documentation. Compare the proposal, communication, answers, insurance confirmation, credential verification and safety approach. Keep the signed agreement, certificate, correspondence, photos and payment records.
A simple verification checklist
| Item | Evidence to keep |
|---|---|
| Identity | Legal or operating name, phone, address and signed proposal |
| Scope | Named trees/branches, method, cleanup, exclusions and change orders |
| Insurance | Current certificate plus confirmation from agent/carrier |
| Credential | Individual name and official verification result |
| Utilities/permits | Responsible party and any reference or permit number |
| Payment | Amount, milestones, accepted methods and receipt |
Sources
- ISA credential verification (opens in a new tab) — official individual credential lookup; accessed July 13, 2026.
- City of Knoxville contractor specifications and best practices (opens in a new tab) — public-tree contractor guidance; accessed July 13, 2026.
- Tennessee Board for Licensing Contractors (opens in a new tab) — official licensing information; accessed July 13, 2026.
- KUB Vegetation Control Program (PDF) (opens in a new tab) — line-clearance context; accessed July 13, 2026.