Lakeville, MN Accessory Structures: ADU Rules (2026)

Minnesota has no statewide ADU mandate, so the rules are set locally. Lakeville does permit accessory dwelling units: all single-family homes in low- and medium-density areas may add one, subject to a city administrative zoning permit (no conditional use permit). The ADU must be located within the principal building on the property, not in a detached structure, and the home cannot be a two-family dwelling as defined by the zoning ordinance. There must be an interior connection between the primary and accessory units that is unlockable from each side, which keeps the ADU functionally part of the single home. Floor area is limited: the ADU may not exceed 30% of the gross floor area of the principal building. Occupancy is capped at no more than two bedrooms and no more than four unrelated persons. A minimum of three garage stalls, each with direct exterior access, is required. The property must be served by single municipal water, sanitary sewer, and gas and/or electric service lines, each with a single meter, and have one heating and air conditioning system. Maximum building height for a single-family home with or without an ADU is three stories or 35 feet. As of the Dakota County guide (updated 12/20/2023), Lakeville had 12 ADUs.