Accessory Structures in Westerville, OH (2026)
5 verified accessory structures rules for Westerville, Ohio, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
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.
Accessory Structures: Adu Rules
Heavy RestrictionsShed Rules
Sheds in Westerville under 200 square feet are exempt from building permits but must meet zoning setbacks. Sheds over 200 sq ft require a building permit. Maximum 15-foot height in residential zones.
Accessory Structures: Shed Rules
Some RestrictionsGarage Conversions
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.
Accessory Structures: Garage Conversions
Heavy RestrictionsCarport Rules
Carports in Westerville are treated as accessory structures and subject to building permits and zoning setbacks. Attached carports must match front setback of the principal dwelling. Fabric/temporary carports are generally prohibited in front yards.
Accessory Structures: Carport Rules
Some RestrictionsTiny Homes
Tiny homes on foundations in Westerville must meet full Ohio Residential Code requirements and zoning minimum dwelling sizes. Tiny homes on wheels (THOWs) are treated as RVs and cannot be used as permanent dwellings in residential zones.
Accessory Structures: Tiny Homes
Heavy RestrictionsLooking for Franklin County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Westerville city rules.
Accessory Structures in Franklin County →