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ADU Town Rules & Regulations

Kennebunk, ME

Feb 3, 2026

Last Updated

About

Kennebunk, Maine, is a scenic coastal town in York County with a population of approximately 11,536 residents as of the 2020 census and continued growth in recent years. Known for its rich history and beautiful shoreline, Kennebunk offers a wide range of attractions for residents and visitors alike. The town is home to the Rachel Carson National Wildlife Refuge, a protected coastal habitat stretching along Maine’s southern coast, ideal for birdwatching and nature walks. History enthusiasts enjoy exploring the Brick Store Museum, which preserves Kennebunk’s cultural and maritime heritage. Kennebunk also features the historic 1799 Kennebunk Inn, many historic shipbuilders’ homes, and the Nature Conservancy’s Kennebunk Plains—locally known as the Blueberry Plains—with over 1,500 acres of nature trails and blueberry fields to explore. With its mix of natural beauty, historic charm, and community events, Kennebunk offers a vibrant coastal Maine experience.

ADU Rules

The following standards must be met in order to create and maintain an accessory apartment:

  • Either the primary or converted unit shall be occupied by the owner of the property as its primary physical residence (primary residence shall be defined as occupying the property for more than 6 months per year).

  • Both the primary and the accessory dwelling unit shall be occupied as primary residences.

  • No more than one accessory dwelling unit is permitted per single family lot.

  • The area of an accessory dwelling unit shall be a minimum of one hundred and ninety

    (190) square feet, and a maximum of one thousand (1,000) square feet.

  • If located in the shore-land overlay district, the accessory dwelling unit must separately

    meet all applicable space and bulk requirements.

  • Accessory dwelling units shall not be used as short term rentals.

  • Prospective purchasers should be advised that only one (1) unit on the property may be rented as a primary residence; and other must be occupied by the owner as a primary residence.

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