Garage conversion rules in Johnson County, KS — 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 unincorporated Johnson County requires a county building permit and zoning review for off-street parking, egress and dwelling-unit standards; creating a separate unit triggers ADU rules.
In unincorporated Johnson County, converting a garage to living space is a county-permitted project. County Planning & Codes reviews the building permit against dwelling-unit standards — egress among them — and the zoning side looks hard at off-street parking, where replacement spaces may be required for what the garage provided. Creating a separate living unit rather than expanded space triggers the county's ADU rules, a different track with its own standards. Either way, the county review comes before the framing.
Contact your local code enforcement office for specific penalty information.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Johnson County's garage conversions rules stack up against other locations.
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