Top 10 Best Tree Service Businesses in Marin County, California (Updated 2026)

California tree service license classes

The Contractors State License Board (CSLB) issues the C-49 Tree and Palm Contractor class to a contractor who plants, maintains and removes trees and palms. The duties include pruning, stump grinding, and tree, palm or limb guying.

C-49 took the place of C-61/D-49 Tree Service, and CSLB no longer accepts applications for the older class. Contractors who already held C-61/D-49 may keep working under it. CSLB says the two descriptions differ slightly, because C-49 names palms, but it regards the work as the same.

C-27 contractors are listed under landscapers.

When tree work needs a contractor license

Business and Professions Code section 7026.1 puts tree work inside the legal definition of a contractor. It covers any person who performs tree removal, tree pruning or stump removal, or who engages in tree or limb cabling or guying.

The section has two exceptions. A nurseryperson who does incidental pruning of trees, or guying of planted trees and their limbs, in the normal course of routine work is not a contractor. Neither is a gardener who, in routine work, does incidental pruning of trees that measure less than 15 feet in height after planting.

CSLB's general rule still applies. A license is required for work valued at $1,000 or more in combined labor and materials, for a project that needs a building permit, or for anyone who uses employees. The general contractors page explains that threshold and California's rules on contracts and payments.

Tree service contractors and workers' compensation

CSLB tells consumers that a California contractor with employees is required to carry workers' compensation insurance. For tree work it goes further. Its workers' compensation requirements page says all active C-61/D-49 Tree Service contractors must carry workers' compensation insurance, or a valid Certification of Self-Insurance, whether or not they have employees. CSLB cites Business and Professions Code section 7125 as the source. The same CSLB note names C-39 roofers.

CSLB also warns that if a worker is injured on your property and the contractor has no insurance, you could be financially liable for the injuries and rehabilitation.

How to check a tree service license

CSLB's lookup shows license status and complaint disclosure.

1. Ask for the contractor's license number. It has up to eight digits and no letters.
2. Enter it in CSLB's Check a License tool. You can also search by business name.
3. Confirm the license is active and carries C-49, C-61/D-49 or C-27.
4. Confirm workers' compensation coverage. CSLB says this information is indicated when you review the status of a contractor's license.

Cal/OSHA safety rules for tree work

California's worker safety orders for tree work, maintenance and removal are in Title 8 of the California Code of Regulations, sections 3420 to 3428.

Under section 3421, each work location where trees are trimmed, repaired or removed must be under the direction of a qualified tree worker. Section 3420 defines that person as an employee who, through training and on-the-job experience, has demonstrated familiarity with the techniques and hazards of the work. A qualified tree worker must also hold a job briefing before each work assignment begins.

Under section 3423, employees may not trim trees within 10 feet of high voltage energized power lines unless they are qualified line clearance tree trimmers or trainees.

Defensible space and tree work

Two state laws require defensible space. Public Resources Code section 4291 covers buildings and structures in the state responsibility area. Government Code section 51182 covers occupied dwellings and structures in a very high fire hazard severity zone designated by the local agency.

Both set these duties for a person who owns, leases, controls, operates or maintains the structure:

1. Maintain defensible space of 100 feet from each side and from the front and rear of the structure, but not beyond the property line unless a law or ordinance requires it.
2. Remove the portion of a tree that extends within 10 feet of the outlet of a chimney or stovepipe.
3. Keep a tree, shrub or other plant next to or overhanging a building free of dead or dying wood.
4. Keep the roof free of leaves, needles and other vegetative materials.

The 100 foot rule does not apply to single specimens of trees that are well pruned and maintained so that they do not rapidly transmit fire to a structure. Both statutes also provide for an ember-resistant zone within 5 feet of the structure, with the details set by state regulation.

Both statutes say a state law or local ordinance may require a greater distance, or work beyond the property line to reach 100 feet. In Marin County, local ordinances and building permits come from the city or town where the property is, or from the County of Marin for unincorporated areas, and those offices are on the government and services page. Tree service is one of the trades in the home services section of this directory.

Who licenses tree service companies in Marin County?

The California Contractors State License Board (CSLB) licenses tree service contractors across the state, including Marin County. The class is C-49 Tree and Palm Contractor. Contractors who held the older C-61/D-49 Tree Service class may keep working under it. You can verify a license on the CSLB website or by calling (800) 321-CSLB (2752).

Does a tree trimmer need a license in California?

Business and Professions Code section 7026.1 counts anyone who performs tree removal, tree pruning, stump removal, or tree or limb cabling or guying as a contractor. It exempts a gardener who, in routine work, does incidental pruning of trees under 15 feet in height. CSLB requires a license for work valued at $1,000 or more.

Do tree service contractors need workers' compensation insurance in California?

CSLB states that all active C-61/D-49 Tree Service contractors must carry workers' compensation insurance, or have a valid Certification of Self-Insurance on file, whether or not they have employees. CSLB warns that if a worker is hurt on your property and the contractor has no insurance, you could be financially liable.

How do I check a tree service license in California?

Use the Check a License tool on the CSLB website. Search by license number or business name. Confirm the license is active and carries the C-49 Tree and Palm class, the older C-61/D-49 Tree Service class, or C-27 Landscaping. CSLB says workers' compensation coverage is indicated when you review the license status.

How do I file a complaint against a tree service company in California?

File a complaint with the Contractors State License Board, online or with a printed form. CSLB addresses violations by licensed and unlicensed contractors for up to four years from the date of the act. CSLB says its investigations are not meant to obtain restitution, and it points to the courts for that.

How much defensible space does California require around a home?

Public Resources Code section 4291 and Government Code section 51182 require 100 feet of defensible space around a structure, stopping at the property line unless a law or local ordinance says otherwise. The first applies in the state responsibility area. The second applies to occupied structures in very high fire hazard severity zones designated by the local agency.