ADU Impact Fees: Olathe vs Overland Park

Are there ADU impact fees in Olathe?

Olathe uses excise taxes rather than traditional impact fees. The Park Excise Tax ($520/dwelling unit per the 2021 schedule) and Street/Traffic Signal Excise Taxes ($0.0037/sq ft of land in single-family districts) apply to new residential construction. Building permit fees are valuation-based under O.M.C. Sec. 15.02.180. Confirm ADU applicability with the Building Codes Division.

Does Kansas cap ADU fees and what other costs apply?

No statewide cap. Kansas has no preemption of municipal residential development fees — KSA 12-741 et seq. delegates fee authority to cities. Other costs include separate mechanical/plumbing/electrical trade permits, Johnson County Wastewater connection charges if a new sewer connection is needed, and Johnson County Appraiser property-tax reassessment.

Does Overland Park charge impact fees for ADUs?

No traditional impact fees. Overland Park charges standard building, trade, and plan-review fees only, plus WaterOne connection fees and Johnson County Wastewater capacity fees if a new water meter or sanitary tap is installed. Kansas does not authorize school, parks, or transportation impact fees on residential development the way California or Idaho do.

How much will permitting an ADU in Overland Park cost?

Municipal permit costs typically total $800-$3,500 depending on size, trade permits, and whether new water/sewer service is installed. This excludes architect, engineer, and construction labor. The Johnson County Appraiser will reassess the property after construction, raising annual property tax based on the improvements.