Accessory Structures in Olathe, KS (2026)
9 verified accessory structures rules for Olathe, Kansas, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Olathe regulates ADUs through local zoning. Kansas has no statewide ADU mandate. Growing acceptance varies by city zoning.
Olathe ADU / Accessory Dwelling Rules
Some RestrictionsADU Permits
Olathe permits accessory dwelling units (ADUs) accessory to a principal single-family dwelling in all residential, downtown, and planned districts under Section 18.50.025 of the Unified Development Ordinance. ADUs require a building permit through the Olathe Building Codes Division and must meet size, height, setback, and architectural-compatibility standards administered by the Planning Division.
Olathe ADU Permits (UDO Sec. 18.50.025)
Some RestrictionsADU Impact Fees
Olathe does not charge a dedicated ADU impact fee, but residential construction is subject to the City's Park Excise Tax and Street/Traffic Signal Excise Taxes adopted under O.M.C. Sec. 15.02.180. Standard building permit fees, plan review, and Johnson County Wastewater connection charges also apply. There is no Kansas statewide ADU fee preemption.
Olathe ADU Impact Fees (Park & Street Excise Taxes Apply)
Some RestrictionsADU Owner Occupancy
UDO Sec. 18.50.025 governing Olathe ADUs does not contain an express owner-occupancy mandate. ADUs must remain accessory to a principal single-family dwelling on the same lot, which preserves the single-family character but does not on its face require the owner to live in either unit. Applicants should confirm current interpretation with the Olathe Planning Division.
Olathe ADU Owner-Occupancy (Not Expressly Required by UDO)
Few RestrictionsADU Rental Restrictions
Olathe does not impose specific rental restrictions on ADUs beyond the use limitations of UDO Sec. 18.50.025. Long-term rental of an ADU is generally permitted in residential, downtown, and planned districts. Short-term rentals (Airbnb/VRBO) are not specifically regulated by the City as of the most recent Olathe Code update, though general health, safety, and zoning rules apply.
Olathe ADU Rental Restrictions (Long-Term Permitted, STR Unregulated)
Few RestrictionsShed Rules
Olathe allows small sheds without permits (typically under 120 to 200 sq ft). Larger structures need building permits. Storm shelters have separate codes.
Olathe Shed & Outbuilding Rules
Few RestrictionsGarage Conversions
Olathe may allow garage conversions with permits. Kansas has no statewide garage conversion mandate. Replacement parking may be required.
Olathe Garage Conversion Rules
Some RestrictionsCarport Rules
Olathe requires permits for carport construction. Setback requirements, height limits, and lot coverage maximums apply.
Olathe Carport Construction Rules
Some RestrictionsTiny Homes
Olathe regulates tiny homes differently based on whether they are on a permanent foundation or on wheels. Zoning and minimum square footage requirements apply.
Olathe Tiny Home & Small Dwelling Rules
Some RestrictionsLooking for Johnson County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Olathe city rules.
Accessory Structures in Johnson County →