unit must meet the setback requirements set forth in the Town ’ s ( Shoreland Zoning Ordinance ) if located within the Shoreland Zone and the setback requirements set forth in any building standards .
B . Size
An accessory dwelling unit must be a minimum of 190 square feet unless the Technical Building Code and Standards Board , pursuant to 10 M . R . S . § 9722 as may be amended , adopts a different minimum standard : if so , that standard applies . An accessory dwelling unit can be no greater than square feet or % of the principal structure , whichever is greater .
C . Water and Wastewater
1 . Prior to occupancy , the owner of an accessory dwelling unit must provide written verification to the Code Enforcement Officer that the accessory dwelling unit is connected to adequate water and wastewater services . Written verification under this subsection must include the following :
a ) If an accessory dwelling unit is connected to a public , special district , or other comparable sewer system , proof of adequate services to support any additional flow created by the unit and proof of payment for the connection to the system ;
b ) If an accessory dwelling unit is connected to a septic system , proof of adequate sewage disposal for subsurface wastewater . The septic system must be verified as adequate by the Local Plumbing Inspector pursuant to 30-A M . R . S § 4221 , as may be amended . Plans for subsurface wastewater disposal may be prepared by a licensed soil site evaluator in accordance with 10-144 C . M . R Chapter 241 , Subsurface Wastewater Disposal Rules ;
c ) If an accessory dwelling unit is connected to a public , special district , or other comparable water system , proof of adequate services to support any additional flow created by the unit and proof of payment for the connection to the system , and the volume and supply of water required for the structure ; and
d ) If an accessory dwelling is connected to a well , proof of access to potable water , including the standards outlined in 01-672 C . M . R . Ch . 10 § 10.25 ( J ), Land Use Districts and Standards , as may be amended . Any test of an existing well or proposed well must indicate that the water supply is potable and acceptable for domestic use .
AFFORDABLE HOUSING DEVELOPMENTS A . Eligibility for Density Bonus
An automatic density bonus applies to certain affordable housing developments approved after July 1 , 2024 , as set forth herein .
1 . The proposed development must be located within a Designated Growth Area as may be established by the Town ’ s Comprehensive Plan and be in a location that permits multi-family dwellings as of July 1 , 2024 .
2 . The proposed development must comply with the minimum lot size standards in accordance with the State Minimum Lot Size law , 12 M . R . S . Chapter 423-A , as may be amended .