17.46.020 REGULATIONS
Unofficial copy. It may be out of date. Not legal or zoning advice. Zoning rules change, and only the city or county can say for sure what is allowed on a property. Confirm with the city or county planning department before you buy, sign or build.
The official Millville code is at https://millvilleut.gov/city-government/citycode/.
Text pulled 2026-10-19 from this source.
Tables (like use tables) may not copy cleanly, so check any table against the official code.
Confirm anything here with Millville planning before you rely on it.
A. An ADU shall comply with all applicable building, health, and fire codes.
B. The owner of the property shall occupy either the ADU or the primary dwelling where the ADU is located as their place of primary residence
C. Occupancy of any ADU shall be limited to a single family as defined by Millville City Code.
D. A minimum of two (2) extra parking spaces shall be provided on a property where an ADU is proposed. These parking spaces cannot be on a City street or the City right-of-way.
1. Any parking spaces displaced by the construction of an ADU (i.e. parking within a garage or carport displaced after the construction of an ADU within the garage or carport) shall be replaced to meet the requirement above.
2. Parking surfaces shall be constructed of a hard surface, such as concrete, asphalt, or gravel.
E. An ADU shall maintain the same physical address as the primary dwelling.
F. An ADU shall not operate on separate utility meters from the primary dwelling.
G. The owner of a property with an ADU shall be charged utility fees as set by resolution.
H. A maximum of one ADU is permitted per parcel.
I. The total area of an EADU shall be less than fifty percent (50%) of the total square footage of the primary residence, but not more than 1,200 square feet.
J. New EADUs are subject to the same ordinances that apply to the principal dwelling unit as far as zoning, height restrictions and setbacks.
K. EADUs are limited to twenty-five percent (25%) of the rear lot area. EADUs shall not be located in front of the primary dwelling unit.
L. An ADU shall not be permitted within a mobile home or within the property area of a mobile home.
M. An EADU shall have a permanent concrete foundation, meet minimum uniform building code requirements.
N. Before renting, an owner of an ADU shall first obtain a valid permit for the purpose of renting from Millville City. The unit will not be made available to rent without that permit. (Ord. 2023-2, 2023)