The Leavenworth County Planning and Zoning Department at 300 Walnut Street, Suite 212, in Leavenworth (913-684-0465, PZ@LeavenworthCounty.gov) administers zoning and building permitting for unincorporated Leavenworth County, north-west of the Kansas City metropolitan area. Any residential, accessory or commercial structure of 200 square feet or more needs a county building permit, applied for in person, by email or through the county’s online application. Two features shape the work. Fort Leavenworth, the oldest continuously operating army post west of the Mississippi, is federal land outside county permitting jurisdiction entirely. And the county’s unincorporated areas are organised into townships, which function as local government units providing basic services such as road maintenance.
The county is among the faster-growing in Kansas, taking residential development from the Kansas City suburbs onto rural land, which puts the zoning and platting questions ahead of the building code on most projects. The cities of Leavenworth, Lansing, Basehor and Tonganoxie permit their own construction; the county's authority runs to the unincorporated remainder, under codes the county has adopted, since Kansas has no general statewide building code.
This guide covers unincorporated Leavenworth County. The Fort Leavenworth reservation is federal land outside county permitting jurisdiction; Leavenworth, Lansing, Basehor and Tonganoxie are cities with their own permit offices.
The post is not the county's to permit. Fort Leavenworth is federal land outside county permitting jurisdiction — construction on the reservation does not go through the planning and zoning department. The housing and commercial development serving it in the surrounding county and cities does, and on a site near the boundary that question comes before any code question.
What requires a building permit in Leavenworth County?
Leavenworth County's layer is the whole of it: the adopted codes and amendments, the permit office, the fee schedule, zoning, contractor licensing, and the county's adopted codes and its rural zoning.
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- Any construction, alteration, repair, demolition or change of occupancy in unincorporated territory, under the codes the county has adopted
- Zoning and platting approval from the county ahead of the building permit
- On-site wastewater approval where the land is unsewered
- New buildings, additions and any structural work on an existing building
- Alterations, repairs and renovations, and any change of occupancy
- Decks, accessory structures above the local threshold, retaining walls, storm shelters and swimming pools
Often exempt
- Ordinary repairs and work the county's adopted code places below the permit threshold, and agricultural buildings within the applicable statutory definition
- Ordinary repairs that do not alter structure, egress or systems
- Direct like-for-like replacement of a fixture, where the local jurisdiction allows it without a permit
- Painting, papering, flooring, cabinets and similar finish work
- Small accessory structures below the local threshold — the zoning ordinance still applies
What is actually local, and what is not
Locally, what stands out is the federal boundary at Fort Leavenworth and the township organisation of the county's rural territory.
Kansas has no general statewide building code: each city and county adopts and amends its own. A few state rules apply everywhere, led by the Kansas Fire Prevention Code. Kansas rules
Who handles permitting in Leavenworth County?
The Planning and Zoning Department is the permitting authority for unincorporated Leavenworth County, administering the county's adopted codes, zoning and platting. Townships provide basic local services such as road maintenance across the unincorporated area, the county's cities permit inside their own limits, Fort Leavenworth is federal ground outside all of it, and the Office of the State Fire Marshal enforces the mandatory Kansas Fire Prevention Code.
Not sure this scope needs a permit?
Get a free quote →| Detail | Information |
|---|---|
| Department | Leavenworth County Planning and Zoning |
| Office | 300 Walnut Street, Suite 212 (county courthouse), Leavenworth, KS 66048 · Monday to Friday 8:00 am to 5:00 pm |
| Phone | (913) 684-0465 · PZ@LeavenworthCounty.gov · online building permit application |
| Scope | Unincorporated Leavenworth County |
| Federal land | Fort Leavenworth, outside county permitting jurisdiction |
| Townships | Local units providing services such as road maintenance |
In 2025, building permits issued in unincorporated Leavenworth County authorized 93 new privately owned housing units, all of them single-family homes, according to the U.S. Census Bureau Building Permits Survey.
Permit types
Residential permits
A house in unincorporated Leavenworth County is permitted by the planning and zoning department against the codes the county has adopted, with zoning and platting cleared first and on-site wastewater approval where the land is unsewered. Access and road maintenance may involve the township as well as the county, which is worth confirming on a rural parcel before the driveway is designed.
Commercial permits
Commercial work in unincorporated Leavenworth County clears the county's zoning and platting, then plan review against the county's adopted codes, with sealed drawings where the state board's threshold is met and the State Fire Marshal reviewing the occupancies within its jurisdiction. Construction on the Fort Leavenworth reservation is outside the county's jurisdiction entirely.
Verifying the code before design
In unincorporated Leavenworth County the Missouri River frontage and Stranger Creek bring floodplain review into the file, on-site wastewater governs much of the rural buildable land, and the Fort Leavenworth reservation sits outside county jurisdiction. An assumption that a neighbouring city's code is the same is the most common and most expensive mistake made in Kansas permitting.
Kansas has no state licence for general contractors or the main trades; cities and counties license them under state rules. Roofers register with the Attorney General. Kansas rules
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Fees follow the county's adopted schedule for unincorporated territory, with each city's own schedule applying inside its limits.
| Item | Fee or rule |
|---|---|
| Building permit | The county's adopted fee schedule, for unincorporated territory |
| Zoning and platting | County approval ahead of the permit |
| On-site wastewater | County approval where the land is unsewered |
| City permits | Leavenworth, Lansing, Basehor and Tonganoxie issue their own |
| Federal land | Fort Leavenworth construction outside county permitting |
| Codes | Confirm the adopted editions from the county's own resolution |
Townships are a layer above the parcel. Kansas organises unincorporated territory into townships, which function as local government units providing basic services such as road maintenance. On a rural Leavenworth County parcel the access, the road standard and the maintenance responsibility may involve the township alongside the county — a layer that does not exist inside a city.
Trade permits and who may pull them
Permit required
- Sites adjoining Fort Leavenworth — confirm the federal boundary before assuming county jurisdiction
- Electrical — separate permit under the locally adopted electrical code, with local licensing
- Plumbing — separate permit under the locally adopted plumbing code, with local licensing
- Mechanical — separate permit under the locally adopted mechanical code, with local licensing
- Fire protection — under the Kansas Fire Prevention Code and the State Fire Marshal's jurisdiction where it applies
Typically exempt
- Direct like-for-like fixture replacement where the local jurisdiction allows it
- Work the locally adopted trade codes place below the permit threshold
Rather not deal with the Leavenworth County building department?
Get a free quote →Trade work is permitted separately under the codes the jurisdiction has adopted. Kansas rules
How to apply for a Leavenworth County building permit
There is no general state building code; confirm the editions and amendments this jurisdiction has adopted before design begins.
Zoning, platting and site development approvals precede the building permit and are entirely local.
Kansas has no state licence for general contractors or the main trades; the requirement is the city’s or county’s own. A licence based on a standard exam named in state law is valid in other Kansas cities and counties that license the trade. Roofers must also register with the Kansas Attorney General.
State law, administered by the Kansas State Board of Technical Professions, sets the threshold for a licensed architect or engineer.
Reviewed against the locally adopted codes and amendments, with the Kansas Fire Prevention Code applying to all but one- and two-family homes.
Footing to final, with the trades on their own permits, then the certificate of occupancy.
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Leavenworth County reviews unincorporated work through the planning and zoning department. What delays a file here is a project whose relationship to the federal reservation was not confirmed, a parcel assumed to be inside one of the cities, and access questions raised after design.
Inspections in Leavenworth County
Inspections follow the sequence of the codes the jurisdiction has adopted — footing, foundation, framing, rough trades, insulation and final — requested from the city's inspection division by permit number, with the trades inspected on their own permits. Work that passes final receives a certificate of occupancy for new buildings and changes of occupancy. Leavenworth County inspects the work it permits in the sequence its adopted codes set, with the trades inspected on their own permits; inside the cities, inspection is the city's.
Leavenworth County permit search and official resources
- Leavenworth County Planning and Zoning — the department, its zoning and its permitting
- Kansas State Board of Technical Professions — when a licensed architect or engineer must seal the drawings
- Office of the Kansas State Fire Marshal — the Kansas Fire Prevention Code, mandatory statewide
- Office of the Kansas State Fire Marshal — the Kansas Fire Prevention Code, mandatory statewide, and the occupancies it reviews
- Kansas State Board of Technical Professions — when a licensed architect or engineer must seal the construction documents
- Kansas Department of Administration, Facilities and Property Management — the codes applying to construction on state-owned property
Inspections are where schedules slip.
Get a free quote →Frequently asked questions
Does the county permit work on Fort Leavenworth?
No. The reservation is federal land outside county permitting jurisdiction; development serving it in the county and its cities is permitted locally.
What is a township here?
Kansas organises unincorporated areas into townships, which function as local government units providing basic services such as road maintenance, alongside county governance.
Does the county permit inside the cities?
No. Leavenworth, Lansing, Basehor and Tonganoxie issue their own permits; the county covers unincorporated territory.
Which code editions apply?
Those Leavenworth County has adopted for unincorporated territory. Kansas has no general statewide building code, so the county's own adoption is the governing document.
Do I need a wastewater approval?
On unsewered rural land, yes — on-site wastewater approval runs alongside the building permit.
Is anything mandatory statewide?
Mainly the Kansas Fire Prevention Code, enforced by the State Fire Marshal, which a local jurisdiction may make more stringent but not less. It does not cover one- and two-family homes.
Simplify Leavenworth County permitting with Alliance Permitting
Leavenworth County has a federal boundary, a township layer and a growing rural edge. We place the parcel against all three before design rather than after.
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More Kansas permitting guides
More Kansas permitting guides
This guide is provided by Alliance Permitting for general information about Leavenworth County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.