ADU rules in Prior Lake, MN — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Prior Lake's zoning code (Chapter 10) does not broadly permit independent accessory dwelling units in single-family residential districts. ADUs (separate kitchens and entrances) require zoning review and may be limited to specific overlay districts.
Prior Lake's residential zoning (R-S, R-1, R-2, R-3) is structured around single-family and duplex/townhome use; the standalone ADU concept (a second independent dwelling unit on a single-family lot with its own kitchen, bath, and entrance) is not broadly permitted as of the city's current code framework. Mother-in-law suites/in-law apartments may be permitted under certain conditions if they share entry and utilities with the principal dwelling and are part of an extended-family use. The Minnesota Legislature has considered statewide ADU pre-emption bills, but as of 2026 Prior Lake has not adopted a permissive ADU ordinance. Applicants should consult Planning at 952-447-9810 before proceeding with any second-unit construction.
Operating an unpermitted ADU is a misdemeanor with fines up to $1,000 plus possible removal of kitchen facilities to bring the building back into compliance. Tax and rental authorization violations may also apply.
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Prior Lake, MN
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