ADU rules in South Bend, IN — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
South Bend allows one accessory dwelling unit on every lot in every district. An ADU is capped at 75% of the main home's floor area or 800 square feet, whichever is less.
Under Section 21-06.01(j)(1) of the South Bend Zoning Ordinance, an ADU (the city calls it an ancillary dwelling) is permitted in all zoning districts, attached or detached. Only one is allowed per lot, and its finished floor area cannot exceed 75% of the primary dwelling or 800 square feet, whichever is less (up to 1,200 square feet if accessory to a non-residential use). In the S1, U1, and U2 districts the owner must occupy one of the units. A detached ADU follows the carriage house standards, sits in an established rear yard within 5 feet of the rear lot line, and cannot be taller than the primary building.
Building or renting an ADU without zoning approval and a building permit brings a stop-work order and code enforcement. Violating the owner-occupancy standard in S1, U1, or U2 can void the ADU's approval.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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