Dayton permits Accessory Dwelling Units under the Dayton Zoning Code (Code of Ordinances Chapter 150) as a conditional use in residential zoning districts containing detached single-family homes. The city revised its zoning code in February 2022 to allow ADUs by conditional use approval through the Board of Zoning Appeals. Building permits are filed through the Dayton Department of Planning, Neighborhoods & Development Building Services Division at the One Stop Center, 371 W. Second Street.
Dayton's Zoning Code is set in the Code of Ordinances Chapter 150 (Zoning) administered by the Department of Planning, Neighborhoods & Development. Prior to 2022, ADUs were not permitted; community members had to obtain a use variance from the Board of Zoning Appeals (BZA). The February 2022 zoning code amendments made ADUs a conditional use in residential districts where detached single-family homes exist, which is a lower standard than a use variance but still requires BZA approval. The BZA evaluates site plans for setback compliance, lot coverage, parking, and compatibility with surrounding properties. Building permits are issued by Dayton Building Services under Chapter 153 (Unified Building Code), which adopts the Ohio Building Code (OAC Chapter 4101:8 Residential and 4101:1 Commercial). Three copies of construction documents must be submitted; reviews target 30 calendar days. Trade permits required: plumbing (Ohio-licensed plumber under ORC 4715), electrical, and mechanical. Properties in Dayton's 13 locally designated historic districts (Oregon, St. Anne's Hill, McPherson Town, Dayton View, South Park, Wright-Dunbar, Huffman, Webster Station, and others) require Landmark Commission Certificate of Appropriateness before permit issuance. Ohio has no statewide ADU preemption law under the Dillon Rule - municipal zoning controls.
Building or occupying an ADU without permits violates Dayton Zoning Code Chapter 150 and Unified Building Code Chapter 153. Penalties include stop-work orders, daily civil fines, and required removal or restoration. Unpermitted electrical and plumbing work violates ORC Chapter 4715 (Plumbing) and Ohio licensure statutes. Conditional use violations may trigger BZA enforcement and potential injunctive relief through Montgomery County Court of Common Pleas. Landmark Commission violations may require restoration to prior condition at owner expense.
Dayton, OH
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Dayton, OH
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Dayton, OH
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Dayton, OH
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Dayton, OH
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