Tree service license in Maryland

Maryland requires a state license for at least some tree work. Maryland law (Natural Resources section 5-417) says a person may not engage in the work or business of a tree expert without a license, though employees supervised by a licensed tree expert do not need their own. Section 5-415 defines tree expert work as diagnosing and prescribing treatment, or trimming, pruning, thinning, cabling, shaping, removing or reducing the crown of trees, for pay. It excludes commercial logging, underground facility installation, and work on trees 20 feet tall or less. A licensed tree expert must tell the Department about the companies working under the license and their liability, property damage and workers' compensation insurance. Checked 25 October 2026. Short explanation, not legal advice.

Maryland law (Agriculture section 5-207) says a business that does pest control must get an annual license showing its category of operation, and each pest control applicator must hold a certificate. Spraying or treating trees for customers is likely covered; contact the Maryland Department of Agriculture pesticide program for the right category before you start. Confirm the exact license category with the Maryland pesticide program before you spray or inject trees for pay.

Maryland's home improvement law (Business Regulation section 8-101) counts landscaping and fences on land next to a home as home improvement, which is licensed by the Maryland Home Improvement Commission. The law does not mention tree work by name, so ask the Commission whether any landscaping or other work you offer also needs that license. Check with the licensing board if a job is large or includes other construction work.

Counties and cities may have their own tree ordinances, forest conservation rules, roadside tree permits or business licenses, so check with each county and city where you work. Check with the city or county where each job is, not only where your shop is.

Maryland's tree expert law makes a licensed tree expert report the liability, property damage and workers' compensation insurance of companies working under the license; talk to a licensed insurance agent about amounts that fit your company. Talk with a licensed insurance agent who knows tree work. General information, not insurance advice.

We checked them on 25 October 2026 and linked 4 official sources on this page. Rules, fees and websites change, so confirm with the agency before you bid or work.