ADU Regulations in Kansas (KS)
Kansas is rated Difficult for ADU construction with an ADU-friendliness score of 30/100 (Restrictive). Kansas does not have a statewide ADU law — regulations are set entirely by local jurisdictions. Owner must reside on the property. Additional parking may be required. Kansas has no statewide ADU legislation. ADU policies are set locally and vary widely. Kansas City and Lawrence have adopted some ADU-friendly provisions. Most smaller municipalities do not specifically address ADUs in their zoning codes.
Full ADU Regulations Summary for Kansas
| ADUs Allowed | Yes |
| Statewide ADU Law | No |
| Maximum ADU Size | Set locally |
| Owner Occupancy Required | Yes |
| Parking Required | Yes |
| Minimum Setback | Set locally |
| Permitting Timeline | Varies by jurisdiction |
| Impact Fees | Varies by jurisdiction |
| Long-Term Rental Allowed | Yes |
| Short-Term Rental (Airbnb) Allowed | Yes |
| Ease of Building | Difficult |
ADU Regulations by City in Kansas
ADU rules can vary by city even within the same state. Without a statewide ADU law, Kansas cities set their own rules, and policies can differ significantly. Below are ADU details for 3 cities in Kansas.
Kansas City
ADUs allowed in some residential zones. Kansas City, KS has more restrictive policies than Kansas City, MO across the border.
Lawrence
ADUs permitted in certain residential zones. Lawrence adopted ADU provisions to address student and workforce housing.
Wichita
Limited ADU provisions. Requires special use permit in most residential zones.
How Kansas Compares to Other States
Below is a comparison of Kansas with five states that have similar ADU-friendliness scores. This comparison helps illustrate where Kansas stands nationally.
| State | Score | Statewide Law | Parking Req? | Owner Occ? | Ease |
|---|---|---|---|---|---|
| Kansas (KS) | 30 | No | Yes | Yes | Difficult |
| Alabama (AL) | 30 | No | Yes | Yes | Difficult |
| Delaware (DE) | 30 | No | Yes | Yes | Moderate |
| Georgia (GA) | 30 | No | Yes | Yes | Moderate |
| Idaho (ID) | 30 | No | Yes | Yes | Moderate |
| Illinois (IL) | 30 | No | Yes | Yes | Moderate |
Frequently Asked Questions About ADUs in Kansas
Can I build an ADU in Kansas?
Yes, ADUs are allowed in Kansas. However, Kansas does not have a statewide ADU law, so the specific rules depend on your city or county's zoning code. Some cities are more permissive than others. The ease of building is rated "Difficult" with a friendliness score of 30/100.
Do I need to live on the property to have an ADU in Kansas?
Yes, Kansas generally requires owner occupancy — the property owner must live either in the main house or the ADU. This means you cannot rent out both units simultaneously. Note: individual cities may have their own owner-occupancy rules, so check your local zoning.
How big can an ADU be in Kansas?
Kansas does not set a statewide maximum ADU size — this is determined by your local jurisdiction. Common local limits range from 600 to 1,200 square feet. Check your city's zoning code for the specific maximum.
How long does it take to get an ADU permit in Kansas?
The permitting timeline in Kansas is: Varies by jurisdiction. Without a statewide mandate, permitting timelines depend entirely on your local jurisdiction's review process.
Who decides ADU rules in Kansas?
Your city or county — Kansas has no statewide ADU statute, so zoning boards set the rules jurisdiction by jurisdiction. We track 3 Kansas cities above (including Kansas City); if yours isn't listed, the planning or zoning office is the authoritative source.
Check ADU Rules for Your City
Use our ADU regulations lookup tool to find the specific rules for your city in Kansas, or browse all 50 states to compare ADU regulations across the country.