ADU rules in Westerville, OH — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Westerville zoning does not currently allow accessory dwelling units (ADUs) in most single-family residential districts. Internal in-law suites without separate kitchens are permitted. Detached ADUs require a conditional-use approval.
Westerville Zoning Code Chapter 1163 does not include a permissive ADU provision like Columbus adopted in 2023. Single-family districts (R-1, R-2) limit dwellings to one per lot. In-law accommodations within the primary home are allowed if they share the kitchen and utilities with the main dwelling. Detached secondary dwellings require rezoning or conditional-use approval by the Planning Commission and Board of Zoning Appeals. No state ADU mandate applies in Ohio.
Unauthorized ADUs cited as zoning violations. Fines up to 500 dollars per day plus orders to remove kitchens or disconnect utilities. Rental of unpermitted units subject to additional housing code penalties.
Westerville, OH
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Side-by-side rule comparisons with other cities in Franklin County.
See how other cities in Franklin County handle adu rules.
See how Westerville's adu rules rules stack up against other locations.
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