How building permits work in Maine
These rules apply across Maine. Each local guide above covers what is specific to that city, town, township or county: its building department and contacts, local rules, fees and inspections.
The state code, who enforces it and the state overlays
The adopted code sets the permit line, but in Maine it applies only where the town’s ordinance requires permits, and a town may add its own exemptions. Ordinary repairs generally need no permit; construction, alteration, repair, demolition and any change of occupancy generally do where the town requires permits. Two Maine features sit on top of that line in almost every town. Shoreland zoning is mandatory statewide within 250 feet of most water bodies and wetlands and within 75 feet of a stream, so a shorefront parcel answers a second ordinance before the building permit. And fees and appeals are local: the state code deletes its own fee and appeals provisions, leaving both to the municipality.
Who enforces, and what the state certifies
Maine does not leave the enforcing officer to the municipality’s discretion. A code enforcement officer under Title 30-A must be certified by the state in each area of responsibility — shoreland zoning, land use, internal plumbing, subsurface wastewater and building standards are separate certifications — within 12 months of appointment, with recertification every six years; the certifying body is now the Maine Office of Community Affairs, which took over the programme in the 2025 reorganisation. A plumbing inspector gets no 12-month grace period: they must be certified before taking office, unless the state health department gives temporary written approval for up to 12 months. A municipality may also meet its MUBEC duty through certified third-party inspectors, hired by the owner or the town, who report to the building official before the certificate of occupancy is issued; where a town has chosen no inspection method, the applicant must hire a certified third-party inspector at their own cost.
Shoreland zoning, wastewater and the unorganized territory
Three Maine overlays reach projects that the building code alone would not. Shoreland zoning is required of every municipality with water in it, and its setbacks, clearing limits and expansion rules apply on top of the building code. Subsurface wastewater on an unserved lot needs a licensed site evaluator’s design on the state’s own form (HHE-200), and the local plumbing inspector must issue the disposal permit before work on the system starts. And beyond the towns lie the unorganized and deorganized areas — more than 10.4 million acres of townships and plantations with no local government or no local land use controls — where the Land Use Planning Commission is the zoning and permitting authority and issues the building permit itself.
Contractor rules and trade licences
Maine has no general contractor licence. A builder needs no state credential to take on a house, and the protection sits in contract law instead: under the Home Construction Contracts Act a contract for more than the statutory threshold must be in writing and carry specified terms, including warranty and dispute-resolution provisions. The trades are licensed: electricians hold licences from the state electricians' examining board and plumbers from the plumbers' examining board, both within the Department of Professional and Financial Regulation, and oil and solid fuel technicians hold their own. Site evaluators for subsurface wastewater are licensed separately.
Trade work is permitted separately and done by state-licensed tradespeople, though an owner may do their own plumbing, wiring and heating work in a single-family home they live in, to the same standards. Internal plumbing runs through the local plumbing inspector on the state’s own permit form rather than through the building permit, and electrical permits come from the state Electricians’ Examining Board unless the town runs its own electrical inspection.