Maine contractor licenses: what the state licenses and what it leaves alone

Maine has no general contractor license, and the state says so

If you came from a state with a contractor board, the first thing to know about Maine is what is missing. The Attorney General's consumer page states: "Maine does not license or regulate home contractors." The same page says the Consumer Mediation Program gets more complaints about contractors than about any other category of business. So there is no state exam for remodeling, carpentry, roofing, siding, painting or handyman work, and no state number to put on your truck for those trades.

That does not mean no rules. The state licenses specific trades (covered below), and your town sets its own permit and code enforcement rules for building work. Maine's legislators have taken up residential contractor licensing bills before, and one news report covered a bill that died when funding fell short. Bills can come back, so check the Legislature's website for current status before you plan a multi-year business around the current setup. For the national picture of how states handle this, see our guide to getting a contractor license, and our general Maine business startup page for the LLC and tax steps.

The $3,000 written contract rule applies to everyone doing home work

The closest thing Maine has to a statewide contractor standard is a contract law, 10 MRSA 1487. Under it, a contract for home construction or improvement with more than $3,000 in materials or labor must be in writing and signed by both you and the homeowner, and both sides get a copy before work begins. The statute lists what the contract must contain:

• Names, addresses and phone numbers for both parties, and the property location.
• Estimated start and substantial completion dates.
• The total price, or the agreed price and a cost estimate for cost-plus work.
• A general description of the work and materials.
• A warranty statement covering faulty materials, code compliance and skilled workmanship.
• A choice among binding arbitration, nonbinding arbitration or mediation, in addition to small claims court.
• A clause requiring written change orders for anything that changes the price.
• An addendum with the Attorney General's consumer protection information.

The first payment cannot exceed one-third of the total contract price. Both the statute and the Attorney General's page say so. The Attorney General's page adds that a homeowner can waive the requirements only if the contractor specifically explains the rights and the homeowner agrees in writing. If you take online bookings or send quotes by text, build the contract step into the process so that a job crossing $3,000 never starts on a text thread. Our website work and CRM work both cover quote and contract steps like this.

The trades Maine does license

Maine's licensing sits in a few boards, mostly inside OPOR. Here is what each page says as of October 2026.

The electricians' board page shows that the 2026 National Electrical Code applies to installations that start on or after July 1, 2026. If you hire licensed electricians, that date matters for your quotes. The Fuel Board lists agreements with other boards covering mini-split heat pump installs in one- and two-family homes and installation and service of hot water, steam and warm air heating systems. If you run an HVAC company, read those agreements before deciding which license your techs need. The page does not say which license covers which task, so call the board at the number listed on it.

For the exam-and-hours path in each trade, see our guides on becoming a licensed electrician and becoming a licensed plumber. Maine's board landing pages do not list hour counts or fees, so get them from each board's candidate bulletin.

Lawn care and pest control need a pesticide license, even for one product

This is the license most likely to catch a small service company off guard. The Board of Pesticides Control says a commercial applicator license is needed to apply any pesticide as a paid service, with lawn and landscape care, tree and shrub care, home pest control, water damage restoration and mold remediation named as examples. It is also needed for any pesticide application on sites open to public use, such as apartment buildings, campgrounds and retail spaces.

The details the Board lists:

• Two levels: operator and master. An operator license is valid only if the employer has at least one licensed master applicator.
• Exams: an operator needs at least two written exams (core plus a category), and a master needs at least three plus an oral exam. Each written exam is listed at $10, and the master oral exam at $40.
• License fee: $105 for operator or master, valid three years and renewable on December 31. A firm license is $300 and requires proof of insurance and a commercial master.
• Continuing education: 9 hours over three years for masters and 6 for operators.
• Categories: 3A outdoor ornamentals and 3B turf cover lawn and landscape work, and 7A to 7F cover structural pest control, including 7F termites. Weed control on driveways, patios, sidewalks or parking lots needs category 6B. A 3A or 3B license alone does not cover those surfaces.
• A firm license is required for custom applicator companies, except sole proprietors with no other employees and companies that treat only premises they own or lease.

Commercial licenses are tied to the company. They are voided when the holder leaves, and the Board warns that employers may be liable for applications by former employees until the Board is told. For the national picture, read how pest control licensing works and starting a lawn care business. If your pressure washing or soft washing work uses biocides or algae treatments, ask the Board whether that product use counts, because the Board's list names mold remediation and category 7C disinfectant and biocide treatments.

Septic work: site evaluators are licensed, installers can certify voluntarily

Maine splits septic work into design and installation. The state requires a license for people who design wastewater disposal systems, and the license is issued after both parts of the exam are passed and renewed every two years. Installer certification is described by the state as voluntary and "non-regulatory." It requires attending one Subsurface Wastewater unit training, a DEP erosion control course and submitting two installation forms for permitted, inspected systems. Certified installers can do the bottom-of-bed inspection on their own installs, but only with a written agreement with the local plumbing inspector. Certification lasts five years and takes six training hours to renew. Check with the Subsurface Wastewater Unit for the current rules before you quote any septic install, because installation work also runs through town permits and the plumbing inspector.

Trades with no state license, and what you still need

Mowing, cleaning, junk removal, window cleaning and pressure washing are not on any state licensing list in the sources above. Carpentry, painting, roofing, siding, decks and handyman jobs are in the same position, because the Attorney General says home contractors are not licensed. Here is what still applies:

• Town rules. Building permits and code enforcement run through each town's code enforcement office. Ask each town where you work, since the state does not set a uniform rule.
• Business name. A sole proprietor's trade name is filed with the town or city clerk under 31 MRSA 2. See our Maine startup page for the LLC steps.
• Sales tax. Maine's sales tax rate is 5.5% on taxable sales of goods and certain listed services, and Maine Revenue Services says the separate service provider tax was repealed effective January 1, 2026. Whether a given service, such as carpentry, landscaping or cleaning, is taxable is a question for Maine Revenue Services. If you sell goods, or bill materials and labor together, ask Maine Revenue Services how your invoice is treated and register before you collect tax.
• Workers' compensation. Under 39-A MRSA 401, a private employer who hires and pays employees must secure compensation, by insurance or self-insurance. See our workers' comp by state table.
• Insurance. The state sets no general liability minimum for unlicensed trades in these sources, but customers and commercial clients often ask for a certificate. Read our contractor insurance guide.

Before you act on this page

General information only, not legal advice. Boards change fees and rules, and the Legislature can pass new licensing laws. Before you bid, confirm the current rule with the board that runs your trade, and with the code enforcement office in the town where the work is.

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