Tree trimming and tree service
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Tree Trimming by city
What tree trimming involves
Tree trimming (pruning) removes dead, damaged, crossing or crowding branches, lifts the canopy over roofs, drives and paths, and thins dense crowns so light and wind pass through. Tree services also remove trees, grind stumps, cable weak limbs and clean up after storms.
Good pruning follows the industry standard for tree care (ANSI A300) — cuts made at the branch collar, no more removed than the tree can tolerate. Ask whether the crew works to it.
Avoid topping
Topping — cutting the top of a tree back to stubs to shrink it — is the one practice to refuse. The International Society of Arboriculture calls it “perhaps the most harmful tree pruning practice known”: it stresses the tree, invites decay and produces weakly attached regrowth that can be more dangerous than what was cut (ISA). A company that offers to top a tree is telling you something about its standards.
When a tree needs attention — and emergencies
- Dead or hanging branches (“hangers”), especially over the house, drive or play areas.
- Cracks in the trunk or major limbs, or a split where two trunks meet.
- Mushrooms at the base, cavities or soft wood — signs of decay.
- A new lean, or soil heaving on one side of the root plate.
- Branches touching the roof or growing into service lines.
After a storm, a tree on the house or a limb hanging over a roof is an emergency for a tree service. A tree on or near a power line is an emergency for the utility first: stay well away and call them. OSHA keeps workers who are not qualified for electrical work at least 10 feet from energized overhead lines of 50 kV or less (OSHA) — a homeowner with a pole saw should keep further back still.
How to choose a tree service
- Look for an ISA Certified Arborist on the team. ISA says tree work should be done only by those trained and equipped to work safely in trees, and its directory lets you verify a credential (ISA).
- Company accreditation exists too: TCIA Accreditation is a third-party program to help consumers identify qualified tree care companies (TCIA).
- Ask for proof of liability insurance and workers’ compensation. Tree work is among the most dangerous trades; an uninsured injury on your property can land on you.
- Get a written quote that says which trees, what will be cut (and how much), whether wood and debris are hauled away, and whether the stump is ground.
- Ask whether a permit is needed. Many cities protect large or heritage trees.
- Be wary of door-to-door crews after storms, and of anyone who recommends topping.
What affects the cost
- Size and height of the tree, and how much is being removed.
- Access: whether a bucket truck or crane can reach it, or a climber has to rig branches down over a roof.
- Hazards: power lines, structures underneath, decay.
- Cleanup: hauling the wood and debris, or leaving it; stump grinding.
- Emergency and storm work, which costs more than scheduled pruning.
Landscaping & Lawn Care cost guide: the factors pros price on →
DIY or pro?
Small branches you can reach from the ground with hand tools are fair game. Anything that needs a ladder and a chainsaw, anything over a structure, and anything near a power line is a job for a trained, insured crew.
Common questions
- When is the best time to trim trees?
- For many trees, late winter while they are dormant, but it varies by species, and dead or dangerous branches should come off whenever they are found. Ask an arborist about your trees.
- What is an ISA Certified Arborist?
- A tree care professional who has passed the International Society of Arboriculture’s certification. It is voluntary, and you can verify it on ISA’s site.
- Is tree topping bad?
- Yes. ISA calls topping perhaps the most harmful pruning practice known.
- Who trims trees near power lines?
- The utility, or contractors qualified for line-clearance work. Call your utility rather than a general tree service for branches touching lines.
- Do I need a permit to cut down a tree?
- In some cities, yes — especially for large, protected or street trees. Check with your city or ask the tree service.
- Does trimming include stump grinding and cleanup?
- Not always. Get it in writing: hauling, wood left for you, and stump grinding are often priced separately.
Related services
Sources
Safety and standards advice on this page comes from these publishers. Dates are the ones each page shows.
- International Society of Arboriculture, Why Hire an Arborist (no date shown; read October 2026)
- International Society of Arboriculture, Why Topping Hurts Trees (2011)
- Tree Care Industry Association, TCIA Accreditation (read October 2026)
- OSHA, 29 CFR 1910.333, Selection and use of work practices (read October 2026)
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