Toledo, OH Accessory Structures: ADU Permits (2026)

Toledo's zoning is governed by the Toledo-Lucas County Zoning Code adopted as Part Eleven of the Toledo Municipal Code (TMC), beginning at Chapter 1101. In single-family residential districts (RS6, RS9, RS12), accessory dwelling units are not permitted by-right under the current code. Two-family dwellings are permitted in RD6 and higher-density zones (RM districts). Property owners seeking to add a detached ADU in single-family zones typically pursue a special use permit through the Toledo Plan Commission with notice to neighboring property owners, or a variance from the Toledo Board of Zoning Appeals. Legalization of pre-existing non-conforming garage apartments and converted upper-floor units is possible through the Department of Inspection. Building permits issue through the Division of Building Inspection (One Government Center) under TMC Chapter 1303, which adopts the 2017 Ohio Building Code (OAC 4101:1) and Ohio Residential Code (OAC 4101:8). Required permits: zoning verification, building permit, electrical permit (Ohio Construction Industry Examining Board licensed contractor), plumbing permit (ORC Chapter 4715 licensed plumber), HVAC permit. Plan review averages 14 to 30 business days. Toledo's older housing stock in the Old West End, Vistula, East Toledo, and Old South End includes many pre-existing non-conforming units that can be legalized.