Lakeville, MN Accessory Structures: ADU Rules (2026)

Section 11-50-11.F lists separate living quarters with kitchen facilities for housing multiple generations as a use allowed in the RS-1 district only by administrative permit, processed under chapter 8 of the Zoning Ordinance alongside the performance standards of chapter 35 and the processing requirements of that chapter. The principal building housing the unit cannot be designed or constructed as a two-family dwelling, and the accessory dwelling unit itself is capped at no more than thirty percent of the principal building's gross floor area, excluding any attached accessory floor area, and limited to no more than two bedrooms as the State Building Code defines a bedroom.

Because it is reviewed as part of a single-family home rather than a separate dwelling, the accessory space must meet the same State Building Code requirements the City adopted at section 9-1-1 for one and two-family dwellings, including egress, fire separation and mechanical standards. The identical thirty-percent floor area cap, two-bedroom limit, and administrative-permit process recur with the same numbers across every RS district in the Zoning Ordinance, from RS-1 through RS-4, and in the RM-1 through RM-3 and RH-1 multifamily districts, so the standard is applied city-wide rather than district by district.