Wells, Maine
Wells, ME Accessory Dwelling Unit (ADU) Rules
Last Updated: 11/17/2025
Image source: Town of Wells Facebook
What You Need to Know
Wells changed their zoning rules in 2025 to allow an easier pathway for building ADUs. The new rules for Wells are outlined below.
Type of Permit Required
ADUs in Wells do not require special permits, and can be built using a traditional building permit. Residents are allowed to build one ADU per lot, regardless of if it’s a single-family, duplex or multi-family lot.
ADU Rules in Wells
ADUs can be a maximum of 800 square feet.
Detached ADUs cannot be less than 400 square feet.
Attached ADUs can be at minimum 190 square feet, and no more than 35% of the area of the main house.
ADUs cannot have more than three rooms and a bathroom.
ADUs may be attached, detached, or built within the main house.
Short term rentals are not allowed - the main house or the ADU can be rented with a minimum lease term of 12 months.
ADUs in Wells do not need additional parking.
Attached ADUs must maintain the architectural style of the main house.
The main house and ADU must be owned by the same person(s).
The property owner(s) must live either in the main house or the ADU.
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