Accessory Structures in St. Joseph County, IN (2026)
2 rules for unincorporated St. Joseph County, Indiana.
Verified from official government sources
ADU Rules
St. Joseph County zoning permits an accessory dwelling unit, capping a detached ADU at 1,200 square feet and requiring it to sit behind the front building line with an Improvement Location Permit. Off public sewer it needs a septic construction permit under 410 IAC 6-8.3.
St. Joseph County ADU (Accessory Dwelling Unit) Rules
Some Restrictions410 IAC 6-8.3-53 (Construction permits)
the owner, or agent of the owner, shall obtain a written construction permit, signed by the health officer, for construction of a residential on-site sewage system
Shed & Carport Rules
St. Joseph County's zoning ordinance sizes a residential storage shed by lot acreage, from a 19-foot, 960-square-foot cap under one acre to no limit at all on five or more agricultural acres, plus an eight-foot setback in agricultural districts.
St. Joseph County Storage Shed & Accessory Building Rules
Some RestrictionsSt. Joseph County, Ind., Zoning Ordinance § 154.070(C)(1)(a), (C)(2)(a)
(C)(1)(a) Accessory Buildings.1.Accessory buildings in agricultural districts on parcels of two acres or less which are accessory to a single family dwelling shall be setback a minimum of eight feet from any side or rear lot line, but shall otherwise comply with the general development standards of the district. All other accessory buildings in any agricultural district shall comply with the ge...
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