Knox County, Maine Building Permit Guide

Building permits in Knox County come from the town, never the county. Rockland and Camden, each with more than 4,000 residents in the 2020 Census, must enforce the Maine Uniform Building and Energy Code; Rockport and Thomaston enforce the 2021 codes too, and every town appoints its own code enforcement officer and local plumbing inspector. On Matinicus Isle and in the unorganized Criehaven and Muscle Ridge Islands townships, the state Land Use Planning Commission (LUPC) issues building permits.

Who issues building permits in Knox County?

Knox County’s administration at the courthouse, 62 Union Street, Rockland ((207) 594-0420, weekdays 8 a.m. to 4 p.m.), oversees departments that include the registry of deeds, probate, the district attorney, the sheriff and jail, emergency management, regional communications and the Knox County Regional Airport in Owls Head. None of them issues building permits. The county describes itself as having 18 municipalities, and its Towns page links to each one’s website.

Rockland and Camden both say state law requires them to enforce the Maine Uniform Building and Energy Code (MUBEC), now based on the 2021 International Codes. Warren’s own site says MUBEC enforcement is optional there and that the town follows the 1970 Model Housing Code while encouraging MUBEC compliance; the state’s 4,000-resident threshold does not count people held in a correctional facility.

The other 14 towns are Appleton, Cushing, Friendship, Hope, Isle au Haut, North Haven, Owls Head, Rockport, St. George, South Thomaston, Thomaston, Union, Vinalhaven and Washington. Each must appoint a code enforcement officer, who handles shoreland zoning, and a local plumbing inspector, so shoreland, plumbing and septic permits come from the town office. Below 4,000 residents a town may choose to enforce the building code, and if it adopts one it may adopt only MUBEC. Two of these towns post that they do: Rockport lists the 2021 International Residential, Building, Existing Building, Energy Conservation and Mechanical Codes among the codes it enforces and requires a building permit for all structures and additions, and Thomaston requires a building permit from its Code Office before any building or structure is erected, moved, added to, structurally altered or demolished, apart from listed exemptions, reviews plans under the 2021 codes and requires a certificate of occupancy before new buildings and additions are used. For the other towns, ask the town office what its ordinances require.

LUPC areas: the state’s map of LUPC jurisdictions puts Matinicus Isle Plantation, Criehaven and Muscle Ridge townships and the county’s other unorganized islands in the LUPC service area. The LUPC’s Downeast Regional Office, 106 Hogan Road, Suite 8, Bangor, serves Knox County and every coastal island in that area, by appointment only.

Electrical, plumbing and septic permits in Knox County

Plumbing and septic permits come from each town’s local plumbing inspector. Electrical permits come from the state Electricians’ Examining Board except in towns with their own electrical inspector; the board’s exceptions include single-family dwellings (certification is needed, or a licensed master electrician may verify the work), though a permit is required for a temporary service to build a one-family dwelling. In the three towns below, the code office handles the trade permits:

• Rockland requires permits for plumbing, electrical work, signs, driveways, sewer connections, floodplain work and shoreland zoning. Its two state-certified code officers review the applications, and the city notes that state law lets homeowners do some of their own electrical or plumbing work, which still needs a permit and inspection.
• Camden takes building, electrical, plumbing, sign, blasting, demolition, shoreland and floodplain applications through its online permit portal, and requires permits for subsurface wastewater disposal, internal plumbing, electrical work, excavation, signs and culverts.
• Warren’s Code Enforcement Officer is also its Local Plumbing Inspector: plumbing permits are needed except for minor repairs or pipe cleaning, and septic permits need a site evaluator’s HHE-200 design.

Permit fees in Knox County

Each town’s council or select board sets its own fees; the LUPC charges under its Chapter 1 rule as amended June 3, 2026.

Rockland’s permit fees are added to the application fee, and starting work without a permit can double the permit fee. The city’s permits web page still shows the older $60 and $100 application fees; the schedule as amended July 13, 2026 sets the figures above. A new 1,500 sq ft house in Rockland would be $65 plus $825, or $890. In Camden, a new 1,800 sq ft house would cost $75 plus $1,080, or $1,155, before trade permits; work started without a permit is charged three times the fee.

Application documents

Camden asks for a site plan only when the footprint changes, and reminds owners that state permits (Permit by Rule, Fire Marshal) and federal Army Corps of Engineers permits are their responsibility. Rockland asks for basic construction information even for sheds and accepts pre-built sheds from familiar companies without construction details, depending on size. For LUPC permits, the application covers lot coverage, the land division history of the lot and every existing structure and use, and is sent to the Augusta office by email to ApplicationSubmissions.LUPC@maine.gov or by mail.

Getting a building permit in Knox County: 5 steps

Inspections in Knox County

Camden requires 24 hours’ notice for every inspection and generally inspects between 8 a.m. and 3:30 p.m. on business days; permits there are usually processed within two weeks. Rockland’s certificate of occupancy is the last step, issued after a final inspection shows the project was built as permitted. Warren carries out a final inspection on all permitted construction, and a new home or manufactured home needs a certificate of occupancy inspection before anyone moves in.

Local details in Knox County

Rockland fences: the city’s FAQ still says a fence needs no building permit, but its permits page lists fences among the structures that need one, and the fee schedule as amended July 13, 2026 charges a $45 application fee for a residential fence, so plan on a permit. A fence must stand entirely on your own property.

Rockland roofs: re-shingling needs no permit, but replacing roof rafters during the job does.

Camden zoning: the town adopted zoning amendments on June 9, 2026 and has a Coastal Armoring Moratorium working group on hardening the shoreline, so check the current rules before waterfront work.

Island permits: Matinicus Isle Plantation is in the LUPC service area, unlike the island towns of North Haven, Vinalhaven and Isle au Haut, which run their own permits.

Maine building code

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

Official Knox County permitting resources

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

• LUPC Downeast Region, Bangor (small LUPC service area) office
• LUPC regional offices
• LUPC land-use standards, Chapter 10
• LUPC building permit forms
• Maine Uniform Building and Energy Code rules
• Maine Office of Community Affairs — Code Enforcement
• Knox County towns and their websites
• Knox County administration contact
• LUPC building permit application help
• LUPC Chapter 1 fee rule, amended June 3, 2026 (PDF)
• Rockland Planning & Code Enforcement Department
• Rockland code enforcement permits
• Rockland land use permit and inspection fees, as amended July 13, 2026 (PDF)
• Camden permits and applications
• Camden fee and penalty schedule, effective March 4, 2026 (PDF)
• Camden online permit portal
• Warren Codes and Planning

Knox County permit FAQs

Does Knox County issue building permits?

No. Rockland and each town issue their own; the LUPC issues them for Matinicus Isle Plantation, Criehaven and the Muscle Ridge Islands.

Which Knox County towns enforce the state building code?

Rockland and Camden must. Rockport and Thomaston also enforce the 2021 codes by their own choice. Warren says enforcement is optional there; the remaining towns decide for themselves.

How much is a building permit for a new house in Camden?

A $75 application fee plus $0.60 per square foot of habitable space under the schedule effective March 4, 2026.

Do I need a permit for a shed in Rockland?

Yes. Rockland requires a building permit for a shed, which must meet the setbacks for its zone.

How much notice does Camden need for an inspection?

At least 24 hours, for every inspection.

Who do I call about building on Matinicus?

The LUPC: its Downeast Regional Office in Bangor serves Knox County by appointment, and its Augusta office is on (207) 287-2631.

Simplify Knox County permitting with Alliance Permitting

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 Knox County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.