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ADU Town Regulations

Durham, ME

Apr 6, 2024

Last Updated

About

Durham is a town in Androscoggin County, Maine, United States. The population was 4,173 at the 2020 census. It is included in both the Lewiston-Auburn, Maine Metropolitan Statistical Area and the Lewiston-Auburn, Maine Metropolitan New England City and Town Area. Durham is considered a "gateway" town because it connects two major Maine communities, the Greater Portland Area with the Lewiston–Auburn Area.

ADU Rules

  • The principal dwelling unit must have at least 1500 sq. ft. of floor area and the accessory apartment must not exceed 50% of the floor area of the principal dwelling unit.

    • Floor area measurements must not include unfinished attic, basement or cellar spaces, nor public hallways or other common areas.

  • The dwelling must have only one main entrance and all other entrances must appear subordinate to the main entrance. An entrance leading to a foyer with entrances leading from the foyer to the two dwelling units is permitted. No open or enclosed outside stairways shall be permitted above the first story.

  • Only one accessory apartment may be permitted per lot. It must be made part of the main residence, or located in a separate building whose primary function is not as a dwelling unit, such as a garage or barn.

  • Accessory apartments may not be permitted for any nonconforming structure or use, where the nonconformity is due to the use of the premises, as opposed to nonconforming dimensional requirements

  • Accessory apartments may be utilized for rental purposes as well as in-law accommodations

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