Garage conversion rules in Westerville, OH — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a garage to living space in Westerville requires a building permit and must meet Ohio Residential Code habitable-space standards. Zoning typically requires replacement parking. Conversion to a separate dwelling unit is not permitted.
Westerville Building Division requires full plan review for garage conversions: insulation, egress windows, ceiling height (7 feet minimum), heating, smoke alarms, and electrical upgrades. Conversions must not reduce required parking below zoning minimums (usually 2 spaces per single-family home). Converting to a separate rental unit is treated as an ADU and is not permitted in single-family districts. Inspections required at framing, insulation, and final.
Unpermitted conversions: stop-work order, fines up to 500 dollars per day, and orders to restore to permitted use. Rental of converted space without approval: housing code violations.
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Side-by-side rule comparisons with other cities in Franklin County.
See how other cities in Franklin County handle garage conversions.
See how Westerville's garage conversions rules stack up against other locations.
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