Accessory Dwelling Units

Accessory Dwellings Units (ADUs) require Conditional Use approval by the Milford Planning Commission. ADUs are a conditionally permitted use in the R-1, R-2, R-3,  and MRD zoning districts. Listed below are the specific standards for ADUs.
  1. An accessory dwelling unit may be located within a principal single-family detached dwelling or a detached accessory building on the same lot as a principal dwelling.
  2. Parking requirements shall be imposed by Planning Commission on a case by case basis. No new access points or driveways shall be created or installed for access to the accessory dwelling unit.
  3. No more than one accessory dwelling unit is permitted on a single lot.
  4. The accessory dwelling unit shall be limited in size to a maximum of 66% of the total living area of the principal dwelling or 800 square feet whichever is greater.
  5. The establishment of an accessory dwelling unit within the building envelope of a legally existing single-family dwelling or through the alteration of a legally existing accessory structure is not subject to setback restrictions provided that the establishment of the accessory dwelling unit does not expand the existing structure’s footprint.
  6. Detached accessory dwelling units are subject to the side and rear yard setback requirements for accessory uses as specified in 1181.08(E) and 1181.08(F). Exception: The alteration of a legally existing accessory structure for the purpose of establishing an accessory dwelling unit is not subject to setback restrictions provided that the establishment of the accessory dwelling unit does not expand the existing structure’s footprint.
  7. An accessory dwelling unit established as an addition to a legally existing single-family dwelling must comply with all setback requirements for single-family dwellings in the applicable zoning district.
  8. Detached accessory dwelling units are not permitted in front yards.
  9. Detached accessory dwelling units shall not exceed 25 feet in height. Exception: a legally existing accessory structure being converted to an accessory dwelling unit may exceed 25 feet provided that the establishment of the accessory dwelling unit does not expand the existing structure’s height.
  10. An addition to a principal single-family dwelling that will contain an accessory dwelling unit must comply with all height requirements for single-family dwellings in the applicable zoning district.
  11. The accessory dwelling shall contain a living area, one bath, and a kitchen or kitchenette (including a refrigerator, microwave oven and/or stove, and sink) and may contain not more than one bedroom.
  12. Detached accessory dwelling units must be of permanent construction and must contain permanent utility hookups. Mobile homes and recreational vehicles are not permitted as accessory dwelling units.
  13. The accessory dwelling unit shall be in harmony and compatible with other buildings or structures located in the neighborhood.
Application for Conditional Use 
Accessory Dwelling Unit Ordinance