[Amended 7-25-2022]
A.
Purpose: The City of Saco provides these accessory dwelling unit (ADU) regulations to increase the supply of affordable housing, encourage provision of housing that meets the needs of a variety of household types, encourage infill development that is compatible in scale and character with existing residential uses, and to encourage infill development that makes better use of existing public investment in streets and utilities.
B.
Applicability: Accessory dwelling units are permitted as an accessory use to any new or existing single-family residence in zoning districts where ADUs are permitted. ADUs can be attached to or within the principal residence or detached and separate from the principal residence. An attached ADU is an apartment that is accessory and subordinate to the principal use of a property as a single-family dwelling. Whether attached or detached, no more than one ADU may be authorized for each individual building lot. To be authorized, all ADUs must be designed and constructed in accordance with the standards specified in Subsection E below.
C.
An authorized ADU shall not be considered a second dwelling unit for the purposes of calculating the required minimum lot area per dwelling unit of Zoning Code Article IV.
D.
No ADU may be rented on less than a monthly basis. Short-term rentals of ADUs of less than one month in duration are prohibited.
E.
Standards:
(1)
Any new construction for an ADU or principal residence must meet all applicable setbacks, lot coverage, and building height requirements.
(2)
The maximum size of any ADU is 1,000 square feet of total floor area. To be authorized, an ADU must be accessory to a principal residence. The minimum size of any ADU is 400 square feet.
[Amended 9-25-2023]
(3)
All ADUs shall be constructed on permanent foundations that meet applicable building codes.
(4)
Attached ADUs can be located anywhere within an existing or proposed single-family residential building, provided that applicable dimensional requirements are met.
[Amended 9-25-2023]
(6)
A detached ADU shall share the existing access drive of the primary residential dwelling unit.
(7)
A detached ADU must be designed and constructed to be visually compatible with the principal residence. Building proportions, exterior finish materials, fenestration and trim, roof pitch, and other architectural details shall be similar or complementary to those aspects of the principal residence.
(8)
If the lot is served by public sewer, both the single-family home and the ADU must be connected to public sewer.
(9)
If the lot is served by public water, both the single-family home and the ADU must be connected to public water.
(10)
Fire protection: Sprinkler systems or other fire suppression systems approved by the Fire Department are required for all detached ADUs. For ADUs attached to or within existing residences, fire suppression systems are only required where they are already installed in the existing residence.
F.
Permit required: A building permit or certificate of occupancy from the City of Saco is required for construction or formation of a legal ADU.
G.
Authority: The Saco Code Enforcement Office is responsible for enforcing this section. The Code Enforcement Office Director may make interpretations of this section to provide a degree of flexibility in administration of these requirements while fulfilling the intent of the City Council.