Seabrook, New Hampshire

Seabrook, NH Accessory Dwelling Unit (ADU) Rules

City Acceptance Rating: 6/10

Last Updated: 8.28.2024

What You Need To Know

An ADU cannot be converted into a condominium or be detached from the single-family dwelling. It must be no larger than 750 square feet and have no more than two bedrooms. Two off-street parking spaces are required, and there can be only one ADU per lot. Either the ADU or the main dwelling must be owner-occupied. An interior door must connect the ADU to the primary dwelling, and the ADU must maintain aesthetic continuity with the main home..

Type of ADU Permit Required

By right if the following conditions are met.

ADU Rules

  • An ADU may not be converted to a condominium; 

  • An ADU may not be detached from the Single-Family Dwelling; 

  • Two off-street parking spaces are required for the ADU; 

  • There shall be no more than one ADU per lot; • Either the ADU or the Single-Family Dwelling shall be owner occupied; 

  • The ADU shall be no larger than 750 square feet; and 

  • The ADU shall contain no more than two bedrooms. 

  • An interior door shall be provided between the primary dwelling unit and the ADU. 

  • The ADU shall maintain an aesthetic continuity with the primary dwelling unit.

Resources:

https://seabrooknh.info/wp-content/uploads/2020/07/Zoning-Ordinance-dated-10-March-2020.pdf

Convert Existing Space, Attached ADUDeanna DuffeyNew Hampshiure, Seabrook, Friendliness Rating 6/10