Penobscot County, Maine Building Permit Guide

Penobscot County has two permit worlds. In its cities and towns the municipal code office issues building permits. In the county’s 40 Unorganized Territories, building permits come from the state Land Use Planning Commission, while the county’s Unorganized Territory office handles E911 addressing and driveway entrance permits. By the Census Bureau’s 2025 estimates the largest municipalities are Bangor (32518), Orono (12421), Brewer (9636) and Hampden (8078).

This guide covers the four largest municipalities, the Unorganized Territories and the state office that permits public buildings.

What requires a building permit in Penobscot County?

Penobscot County has no county building rules. Maine’s building code is adopted statewide, but whether a permit is needed, what it costs and how it is filed are set by each town, as the examples below show.

Maine’s adopted code applies statewide, but permits are required where the town’s ordinance says so; shoreland zoning applies statewide near water, fees and appeals are local, and code enforcement officers must be certified by the state. Maine rules

Who handles permitting in Penobscot County?

Unorganized Territories: building permits come from the state Land Use Planning Commission. Its Eastern Regional Office (191 Main Street, East Millinocket, by appointment only) serves southern Penobscot County, and its Northern Regional Office serves portions of northern Penobscot County. The county’s Unorganized Territory office (97 Hammond Street, Bangor, 207-942-8566) assigns E911 addresses, with a site visit, and anyone opening a new driveway on a town way there must complete the county’s Highway Entrance Permit Application.

For public buildings, the Maine State Fire Marshal’s Office Plans Review division (45 Commerce Drive, Suite 1, Augusta; (207) 626-3880) issues the state construction permit, plus accessibility (barrier-free) permits and fire sprinkler permits, on top of the town permit.

Local rules in the largest Penobscot County towns

Bangor

Contact the Code Enforcement Office to obtain a permit. The city publishes pre-approved housing plans, two accessory dwelling unit designs and a three-unit and a four-unit building, designed to meet current City of Bangor codes, each with a residential checklist.

Orono

Building, electrical, plumbing, heating and blasting permits, fees and inspection requests go through the town’s online portal. Curb cut and road opening permits are obtained at the Code Office but approved by Public Works, sewer connection or repair permits by the Wastewater Superintendent, and septic applications must be signed by the Site Evaluator or Engineer before submission.

Brewer

Code Enforcement handles all construction permits and certificates of occupancy, with applications through the city’s online portal. Apply about a month ahead, as review can take up to 30 days.

Hampden

Applications go through the town’s online portal; the Code Office issues building and demolition, solar, internal plumbing and subsurface wastewater, home business and flood hazard permits. The town notes that minimum standards in its application forms are out of date after the state code change of 4/7/2025. Projects on or within 300 feet of any waterbody may need a Shoreland Zoning permit even when no building permit is required.

Penobscot County permit costs and fees

Each municipality sets its own fees. Brewer charges $0.50 per square foot of finished space and $0.25 per square foot of unfinished space for new construction and remodels (minimum $50, maximum $25,000), plus a non-refundable $20 review fee on all permits since October 11, 2022; base fees are doubled if the permit is pulled after work has started.

How to get a building permit in Penobscot County

Inspections in Penobscot County

Inspections are done by the municipal code office. Bangor schedules any on-site inspection with you; Orono takes inspection requests through its online portal.

Official Penobscot County permitting resources

These are the primary sources behind this guide. Codes, fee schedules and procedures change — confirm the position for your filing date.

• Penobscot County Unorganized Territory
• LUPC Eastern Regional Office
• Bangor Code Enforcement
• Orono permits
• Brewer Code Enforcement
• Hampden Code Enforcement
• Maine State Fire Marshal Plans Review

Frequently asked questions

Who issues building permits in Penobscot County’s Unorganized Territories?

The state Land Use Planning Commission; the county assigns E911 addresses and issues driveway entrance permits there.

How far ahead should I apply in Brewer?

About a month, as review can take up to 30 days.

Does Bangor have pre-approved plans?

Yes: two accessory dwelling unit designs and a three-unit and a four-unit building, each with a residential checklist.

Simplify Penobscot County permitting with Alliance Permitting

• Confirm which town code office or state office has the parcel and the project type
• Prepare the town application, state plumbing forms and any State Fire Marshal permit
• Schedule the town’s required inspections and close out the permit

Alliance Permitting is a permit documentation and submission company in Maine. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Penobscot County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.