ADU Rules in Kansas City, Missouri

Kansas City, Missouri regulates accessory dwelling units under Zoning and Development Code §88-305-15 and the City's Information Bulletin 170.

Where ADUs Are Permitted

Section 88-305-15 states that ADUs are permitted on any lot with a detached dwelling where the dwelling is the principal building, subject to the section's standards.

This is broader than the older page's description of only a few named residential districts.

Attached and Detached ADUs

• An attached ADU must be in the rear or side yard.
• A detached ADU must be in the rear yard.

Owner Occupancy

The lot owner must reside in either:

• the principal dwelling; or
• the accessory dwelling.

The code also requires a recorded deed restriction before issuance of the ADU Certificate of Occupancy.

Parking

No additional off-street parking is required for the ADU.

Size

Information Bulletin 170 states:

• maximum ADU floor area: 800 sq ft or 90% of the principal dwelling's floor area, whichever is smaller;
• for a detached ADU, the maximum footprint is 60% of the principal dwelling footprint or 25% of the rear yard, whichever is smaller, and may not exceed 800 sq ft.

Detached ADU Setbacks

Information Bulletin 170 states a 5 ft setback from property lines, including projections, with a street-side-yard condition tied to the principal building.

Other accessory-structure standards may also apply.

Official Sources

KCMO Information Bulletin 170 — Accessory Dwelling Units

Kansas City Zoning and Development Code

Disclaimer: Confirm the current code and permit bulletin before preparing construction plans.