Washington County, KS Building Permits, Zoning & Septic

A residential building permit appears not to be required in unincorporated Washington County, Kansas, but the county has not published a clear statement confirming that answer.¹ Ask the County Clerk before construction because building inspections, building-code adoption and occupancy certificates also remain unconfirmed.² Septic is definite: the county requires a permit before a private wastewater system is built or modified.³

At a glance

Building permit: Appears not required outside city limits; confirm with the County Clerk¹²
County zoning: Appears absent outside city limits; ask the County Clerk to confirm for the parcel⁴²
Septic permit: Required through the Washington County Sanitarian³⁵
Well permit: The Sanitarian publishes the county application; contact the office before drilling⁶⁷
RV or tiny-home living: County rules could not be confirmed; ask the County Clerk before moving in²
Owner-builder exemption: No county exemption could be confirmed⁸
State-highway driveway: A Kansas state permit is required to construct or alter the connection⁹

Who to call

Septic permits

Washington County Sanitarian

Private wastewater permit information and the county well-water permit application

785-770-2057

214 C Street, Washington, KS 66968

Also useful

Washington County Clerk

General county administration and records; works with Road and Bridge on building-moving permits

785-325-2974

214 C Street, Washington, KS 66968

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

Do you need a building permit in Washington County, Kansas?

A residential building permit appears not to be required on unincorporated Washington County land.¹ That answer is based on the county office structure, however, rather than an express county statement about ordinary home construction.¹ Washington County has not published a clear answer on residential building inspections, certificates of occupancy or local building-code adoption, so ask the County Clerk for written confirmation before ordering materials.² Kansas leaves local jurisdictions responsible for adopting and enforcing building energy codes, while the state building-inspection program cited here covers state-owned buildings rather than private rural homes.¹⁰¹¹ Moving an existing structure is different from constructing a new one: the Clerk works with Road and Bridge on building-moving permits.²

Who handles Washington County building and permit questions?

Washington County does not identify a dedicated building or zoning office, so begin with the Washington County Clerk for questions about construction, inspections, occupancy and land-use records.¹⁴ The Clerk is at 214 C Street, Washington, KS 66968, and the office phone is 785-325-2974.² The Clerk also works with Road and Bridge on permits for moving buildings.² For wastewater and water-well paperwork, go directly to the Washington County Sanitarian at the same street address or call 785-770-2057.⁶ The Sanitarian page provides septic-permit materials, the county sanitary code and the well-water permit application.⁶ These county contacts are for land outside incorporated cities; if a parcel is inside a city, ask that city about its own permits and ordinances.¹²¹³

Does Washington County, Kansas have zoning?

Unincorporated Washington County appears to have no countywide zoning, but the county has not published an explicit confirmation or a zoning map that settles the question.⁴ Ask the County Clerk whether a particular parcel is subject to any county resolution, development code or recorded restriction before relying on that reading.² Kansas counties may adopt zoning for all or part of their unincorporated territory, and adopted districts may regulate lot dimensions, yards, lot coverage and building height.¹³¹⁴¹⁵¹⁶¹⁷ Washington County has not confirmed county rules for minimum home size, minimum lot size, setbacks, lot coverage or building height. Agricultural-use protection is conditional: property that keeps its agricultural tax classification may retain agricultural-use exemptions from county zoning controls.¹⁸ Incorporated cities can apply their own rules inside city limits, so do not carry the rural answer into a city parcel.¹⁹

How do septic permits work in Washington County?

Washington County requires a permit before anyone constructs or modifies a private wastewater system in the unincorporated county.³ The Washington County Sanitarian administers the application materials and county sanitary code.⁶ The county must issue or deny a sanitary-code permit within 30 days after receiving the application, and the permit fee comes from a schedule set by the county administrative agency.⁵²⁰ A private system on property within 400 feet of an existing public sewer is allowed only when connecting is not feasible and the county finds that the sanitary code's purposes are met.²¹ The site evaluation matters here because only 6.3% of county soils are rated without severe limits for a conventional septic drain field.²² That does not rule out building, but it makes early soil and system planning especially valuable.²² Subdivision wastewater plans also need Sanitarian approval before development proceeds.²³

Can you live in an RV or tiny home in Washington County?

Washington County has not published a confirmed rule for long-term RV occupancy, temporary camping or tiny-home living on private unincorporated land. Ask the County Clerk about the exact parcel and intended use before buying, installing utilities or moving in.² The apparent lack of countywide zoning does not by itself prove that year-round RV living or a tiny home is allowed.⁴ Wastewater from a dwelling still must go to a properly designed septic field, wastewater pond, approved alternative system or permitted treatment plant; surface discharge, cesspools and dry wells are not allowed.²⁴ Inside the City of Washington, a separate municipal rule requires City Council permission to occupy a mobile home.²⁵ The city campground's limit is 30 consecutive nights, but that rule governs the public campground rather than private rural acreage.²⁶

Building a home in Washington County: steps in order

Verify whether the parcel is inside a city or in unincorporated Washington County, because cities and counties may adopt different zoning and building rules.¹³¹²
Ask the County Clerk at 785-325-2974 to confirm the parcel's building-permit, inspection, occupancy, zoning and floodplain requirements in writing.²
Contact the Sanitarian at 785-770-2057 before designing the wastewater system; county approval is required before construction or modification.⁶³
Evaluate the soil early because only 6.3% of county soils avoid severe conventional-drain-field limitations.²²
Confirm the well application with the Sanitarian before drilling because Kansas well-permit requirements vary by county and city.⁷⁶
Obtain a state permit before constructing or altering any driveway connection to the Kansas highway system.⁹
If subdividing, obtain county approval of the onsite wastewater plans before development.²³

What should you check before buying Washington County land?

Start with septic feasibility: only 6.3% of Washington County soils are rated without severe limits for a conventional drain field, even though 96.5% of county land has a slope of 15% or less.²²²⁷ Confirm the building site, replacement-field area and well plan with the Sanitarian before closing.⁶ Ask the County Clerk about building permits, zoning, floodplain administration, legal access and recorded restrictions because the county's published materials do not resolve all of those questions.² A driveway joining the state highway system needs a state permit; county- or township-road access requirements could not be confirmed.⁹ Washington County has about 6.2 residents per square mile, and the nearest city of 100,000 or more is about 77 miles from the county center, so contractor travel and service access deserve an early check.²⁸²⁹ The effective property-tax rate is about 1.5%, with a median annual bill of $1,551.³⁰³¹

Watch-outs

The residential building-permit answer is not backed by an explicit county statement; ask the County Clerk to confirm before construction.¹²
Washington County has not confirmed its countywide zoning status or parcel-level rules for setbacks, minimum size, RV living or tiny homes; ask the County Clerk about the parcel.²
City rules do not answer what is allowed on unincorporated county land.¹³
Conventional septic conditions are difficult on most county soils, so investigate the site before settling on a house location.²²

Sources

Written September 28, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

How Washington County scores

Seclusion76100% ev.

Self-Sufficiency27100% ev.

Admin Boringness7490% ev.

Durability42100% ev.

Property Autonomy47100% ev.

Carry Cost74100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$167kTypical home

1.5%Property tax

$2,737Land / acre

31.1"Annual rain

9.1% of yrsSevere drought

22.6 / yr (+16.1)Mid-century 100°F days

24 daysMid-century dry spell

1.81" (+3.6%)Mid-century 1-day rain

1.56×Wildfire change factor

100%Forward climate coverage

$2,110Home insurance / yr

3.8% / yrInsurance growth

1.41%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

6,148People within 30 min

770,446People within 2 hr

4,756Radius comparison (15 mi)

6.2People / sq mi

0.1%Federal land

96.5%Land at 15% slope or less

6.3%Septic soil without severe limits

35,734 acWorkable land screen

8%Wooded land

47.2 tonsBiomass / forest ac

53.3°FAvg temp

Answers from the rulebook for Washington County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Washington County rules

Mandatory utility hookupSewer (with conditions)
Private wastewater systems on property within 400 feet of an existing public sewer in unincorporated Washington County.
- A private wastewater system may continue in use or be constructed within 400 feet of an existing public sewer only if connection to that sewer is not feasible and the Administrative Agency certifies that the code's purposes will not be compromised.
- A private wastewater site also cannot be approved where connection to an approved public wastewater system is feasible.
distance from existing public sewer: <= 400 feet (private system allowed only when sewer connection is not feasible and the Administrative Agency certifies compliance)
“connection to such a sewer is not feasible”
Sanitary Code, Washington County, Kansas ↗Re-checked Sep 11, 2026
Agricultural exemptionConditional
Agricultural-use exemptions from county zoning controls for property retaining agricultural classification in Washington County.
- The exemption is not automatic; the property must retain its agricultural classification for property-tax purposes.
- The exemption may be retained under K.S.A. 12-758 or K.S.A. 19-2960.
- The exemption is waived if there are alterations to the improvement.
- The determination is county specific and is independent of the Kansas Property Valuation Division; the county commission or planning department decides how agricultural exemptions are applied.
- The county FAQ states that agritourism recognition does not override or replace county zoning, planning, or permitting requirements.
“If a property retains its agricultural classification for property tax purposes, it may retain its agricultural use exemptions from county zoning controls”
Appraiser FAQ - Washington County ↗Re-checked Sep 11, 2026
Subdividing landRegulated (with conditions)
Subdivision development in unincorporated Washington County where on-site wastewater management is implicated.
- The subdivision cannot be developed until plans and specifications for on-site wastewater management are approved by the Administrative Agency.
- The sanitary code resolution states that the code applies to all unincorporated areas within Washington County, Kansas.
- The document identifies the Washington County Board of County Commissioners as the Administrative Agency.
- The resolution adopting the amended Environmental/Sanitary Code was passed, approved, and adopted on April 8, 2002.
“no person shall develop any subdivision until the plans and specifications for on-site wastewater management have been approved by the Administrative Agency.”
Sanitary Code, Washington County, Kansas ↗Re-checked Sep 11, 2026
Permit feesVariable (with conditions)
Permits and licenses required by the Washington County Sanitary Code in unincorporated areas of Washington County.
- The Administrative Agency establishes the fee schedule.
- The required fee must be paid before the Authorized Representative processes an application.
- The cited code does not state the fee amounts.
“The Administrative Agency shall establish a schedule of fees”
Washington County Environmental Code ↗Re-checked Sep 11, 2026
Permit processPublished (with conditions)
County sanitary-code permits and licenses, including private wastewater-system permits, in unincorporated Washington County.
- The code applies to all premises in unincorporated areas of Washington County.
- Private wastewater-system plans and specifications must be approved before development.
- No person may construct or modify a private wastewater system until a permit has been issued.
- Completed systems must be inspected and approved before being covered or made inaccessible.
- Systems must be completed within 12 months of the permit application date, subject to extensions; an extension requires an additional permit fee.
- The county website identifies the Sanitarian as administering septic-system and well permits and inspections.
permit decision deadline: 30 days (The Authorized Representative issues or denies the permit or license within 30 days of receipt.) · inspection notice: >= 1 working day (Notice before required inspection.) · system completion deadline: 12 months (Extensions may be granted by the Authorized Representative; an additional permit fee is required.)
“shall issue or deny the permit to construct or license within 30 days of such receipt.”
Washington County Environmental Code ↗Re-checked Sep 11, 2026
County-wide zoningAbsent
No county planning or zoning department appears among Washington County's offices; unincorporated areas appear unzoned.
Washington County, KS - County Departments ↗Scouted from the county site, not yet independently re-checked

Kansas rules that apply here

Building permitRequired
Construction, additions, and covered renovations or occupancy changes on State of Kansas-owned property administered through the Department of Administration's Design, Construction & Compliance process.
- The code footprint is required for all new construction, additions, and building renovation/remodeling affecting active or passive life-safety systems or changing occupancy on State property.
- A permit to build is issued as Form 125 Project Acceptance after applicable code footprints and temporary egress plans are accepted by DCC/OSFM and construction documents are accepted by DCC.
- The source states that projects not on state property should be directed to the local code enforcement office or Kansas Fire Marshal's office.
permit form: Form 125 - Project Acceptance
“A permit to build will be granted when the code footprint, if applicable, and temporary egress plans, if applicable have been accepted by DCC / OSFM and construction documents have been accepted by DCC. The permit to build is issued on the Form 125 - Project Acceptance.”
Building Design and Construction Manual, Part A, Chapter 5 – Code and Occupancy Requirements ↗Re-checked Sep 26, 2026
Building code adoptedPartial
Statewide Kansas building-energy-code and state fire-prevention-code framework, including new commercial and industrial structures and specified classes of new construction, additions, and occupancy changes.
- Kansas is a home rule state and local jurisdictions retain responsibility and authority for adoption and enforcement of building energy codes.
- The statewide IECC 2006 standard applies to new commercial and industrial structures.
- The state corporation commission has no authority to adopt or enforce energy-efficiency standards for residential, commercial, or industrial structures.
- Cities and counties may adopt or enforce energy-efficiency standards within their jurisdictions.
- Kansas State Fire Marshal review for the Kansas Fire Prevention Code applies to the building and occupancy categories listed on the official plans-review page, including large assembly, specified educational and institutional occupancies, and specified residential occupancies.
- For new homes, the state requires homebuilders and realtors to disclose certain energy-efficiency information using the Kansas Energy Efficiency Disclosure form.
state energy-efficiency code: 2006 International Energy Conservation Code (IECC 2006) (Applicable state standard for new commercial and industrial structures) · state fire-prevention building code: 2006 International Building Code (IBC) and International Fire Code (IFC) (Projects reviewed for compliance with the Kansas Fire Prevention Code; applicability depends on the project and occupancy categories stated by the State Fire Marshal)
“Because Kansas is a home rule state, the responsibility for adoption and enforcement of building energy codes lies with local jurisdictions.”
Kansas Building Energy Codes ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Partial — Kansas statewide building-code adoption authority as specifically addressed by the state energy-efficiency statute.
  “The International Energy Conservation Code 2006 (IECC 2006) is hereby adopted as the applicable energy efficiency standard for new commercial and industrial structures in this state.”
  66-1227. Energy efficiency of buildings; standards ↗Re-checked Sep 26, 2026
InspectionsRequired
Buildings and property owned by the State of Kansas undergoing construction or covered repairs, improvements, or occupancy changes.
- DCC conducts the building construction inspections for buildings and property owned by the State of Kansas.
- Healthcare and childcare occupancies and Board of Regents capital-improvement projects require joint or additional OSFM inspection as described in the manual.
- Required code inspections are tied to issuance of the Certificate of Occupancy.
“The Department of Administration - Office of Facilities Management - Design, Construction & Compliance conducts building construction inspections on buildings and property owned by the State of Kansas.”
Inspection Information ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — Building construction inspections for buildings and property owned by the State of Kansas.
  “The Department of Administration - Office of Facilities Management - Design, Construction & Compliance conducts building construction inspections on buildings and property owned by the State of Kansas.”
  Inspection Information ↗Re-checked Sep 9, 2026
Certificate of occupancyRequired
Any portion of a State of Kansas-owned building that has been in construction or has a change in occupancy, under the Department of Administration DCC process.
- Form 150 is issued before occupancy of any portion of a building that has been in construction or has a change in occupancy.
- Healthcare and childcare occupancies and Board of Regents capital-improvement projects require OSFM participation in construction inspections before authorization or acceptance of occupancy.
- The manual states that failure to submit the occupancy request and schedule required inspections results in denial of occupancy.
certificate form: Form 150 - Certificate of Occupancy
“Form 150 - Certificate of Occupancy will be issued by DCC prior to occupancy of any portion of a building that has been in construction or has a change in occupancy. For Healthcare and Childcare Occupancies and Capital Improvement Projects for the Board of Regents, OSFM will perform construction inspections prior to authorization/acceptance of occupancy.”
Building Design and Construction Manual, Part A, Chapter 5 – Code and Occupancy Requirements ↗Re-checked Sep 26, 2026
Zoning districtsPartial
Kansas cities and counties that adopt zoning regulations under K.S.A. 12-753
- The statute authorizes, but does not require, each city or county to adopt zoning regulations.
- A governing body may divide territory into districts of different number, shape, area, and classes according to land and building use and intensity.
- Adopted regulations may regulate building height, stories, size, lot coverage, yards, open space, population density, land uses, natural-resource conservation, floodplain land, and setbacks from streets or highways.
- District boundaries must be defined in the regulations or by an incorporated official map.
- County zoning maps must be marked as the official copy incorporated by board-of-county-commissioners resolution and filed with the county clerk or another designated public office.
- City zoning maps must be marked as the official copy incorporated by governing-body ordinance and filed with the city clerk or another designated public office.
- The regulations and accompanying maps are public records.
- The section became effective on and after January 1, 1992.
effective date: 1992-01-01
“The governing body may divide the territory subject to its jurisdiction into districts of such number, shape, area and of such different classes”
2026 Kansas Statutes, K.S.A. 12-753: Zoning regulations; districts; restrictions ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Partial — Kansas statutory framework governing zoning districts adopted by cities and counties; this does not publish the actual district maps or classifications for each local jurisdiction.
  “The governing body may divide the territory subject to its jurisdiction into districts of such number, shape, area and of such different classes”
  K.S.A. 12-753: Zoning regulations; districts; restrictions ↗Re-checked Sep 26, 2026
Minimum lot sizeDistrict specific (with conditions)
Kansas county zoning regulations for unincorporated urban areas and municipal zoning regulations adopted under Kansas planning and zoning statutes.
- Actual minimum dimensions or area are set by the applicable local zoning classification, if adopted.
- County urban-area regulations must be uniform within each zoning classification, but may differ between classifications.
- No statewide numeric minimum lot area was identified.
minimum lot dimensions or area: local zoning classification
“the density of population, including minimum width, depth and area of lots”
K.S.A. 12-753 — Zoning regulations; districts; restrictions ↗Re-checked Sep 9, 2026
SetbacksDistrict specific (with conditions)
Building setbacks and yard or open-space requirements established by applicable Kansas municipal or county zoning regulations.
- Actual setback distances are determined by the applicable local zoning classification or applicable highway/street setback resolution.
- Agricultural buildings may still be regulated for setbacks from public roads under K.S.A. 19-2960.
- No statewide numeric setback distance was identified.
yard, court, open-space, or street/highway setback: local regulation
“the size of yards, courts and other open spaces”
K.S.A. 12-753 — Zoning regulations; districts; restrictions ↗Re-checked Sep 9, 2026
Lot coverageDistrict specific (with conditions)
Percentage of a lot that may be occupied under applicable Kansas municipal or county zoning regulations.
- Actual lot-coverage percentage is set by the applicable local zoning classification, if adopted.
- No statewide numeric lot-coverage percentage was identified.
maximum percentage of lot occupied: local zoning classification percent
“the percentage of lots that may be occupied”
K.S.A. 12-753 — Zoning regulations; districts; restrictions ↗Re-checked Sep 9, 2026
Building heightDistrict specific (with conditions)
Building height and number-of-stories restrictions established by applicable Kansas municipal or county zoning regulations.
- Actual height or story limits are set by the applicable local zoning classification, if adopted.
- No statewide numeric building-height limit was identified.
maximum building height or stories: local zoning classification
“restrict and regulate the height, number of stories and size of buildings”
K.S.A. 12-753 — Zoning regulations; districts; restrictions ↗Re-checked Sep 9, 2026
Manufactured homesLimited
Placement and residential occupancy of manufactured homes in Kansas jurisdictions with applicable county or city zoning regulations.
- Manufactured homes remain subject to applicable county and city zoning regulations.
- A governing body may not exclude manufactured homes from its entire zoning jurisdiction.
- A governing body may not exclude residential-design manufactured homes from single-family residential districts solely because they are manufactured homes.
- Architectural or aesthetic standards compatible with site-built housing may still apply.
- Valid restrictive covenants running with the land are not preempted.
- The source states the zoning provision became effective January 1, 1992.
“All mobile homes shall be subject to zoning regulations of counties and cities applicable to areas in which such homes are located.”
K.S.A. 75-1218 — Exemption from construction codes; zoning ↗Re-checked Sep 26, 2026
Who permits septicMixed (with conditions)
Domestic onsite wastewater systems statewide in Kansas, including septic tanks, soil absorption fields, lagoons, and approved alternative systems.
- KDHE establishes statewide minimum standards under K.A.R. 28-5-6 to 9 and Bulletin 4-2.
- Local governments may adopt stricter sanitary or environmental codes, approve plans, issue construction and operating permits, and grant variances.
- Sanitary codes are usually administered through county health departments.
- Where no local code exists, landowners must comply with K.A.R. 28-5-6 to 9 and the statewide minimum standards.
“Local governments have the authority to adopt minimum requirements (codes) for onsite wastewater management systems, to approve individual plans, to issue permits for construction, to issue permits for operation, and to grant variances. County sanitary (environmental) codes specify local design and permitting requirements. [...] If there is no local code, landowners are required to comply with Kansas Administrative Regulations (K.A.R.) 28-5-6 to 9 and minimum standards in this bulletin.”
MF2214 Minimum Standards for Design and Construction of Onsite Wastewater Systems ↗Re-checked Sep 9, 2026
Septic permitLimited
Private onsite wastewater systems throughout Kansas, where permit requirements depend on applicable county or other local sanitary/environmental codes.
- Local governments may adopt codes and issue construction and operating permits.
- County sanitary or environmental codes specify local design and permitting requirements.
- If there is no local code, landowners must comply with K.A.R. 28-5-6 to 9 and KDHE Bulletin 4-2.
- All septic tanks installed in Kansas must comply with KDHE Bulletin 4-2.
- The cited state materials do not establish a single construction- and operating-permit requirement applicable statewide.
applicable state regulations without local code: K.A.R. 28-5-6 to 9 · state minimum standard: KDHE Bulletin 4-2
“County sanitary (environmental) codes specify local design and permitting requirements. [...] If there is no local code, landowners are required to comply with Kansas Administrative Regulations (K.A.R.) 28-5-6 to 9 and minimum standards in this bulletin.”
Local Environmental Protection Program ↗Re-checked Sep 26, 2026
Off-grid sanitationLimited
Domestic wastewater disposal without a public sewer connection, using an approved septic system, lagoon, or alternative onsite system.
- Domestic wastewater must be discharged to an approved sewage collection system, approved lagoon, septic system, alternative system, or permitted sewage treatment plant.
- Private sewerage facilities are conditioned on public sewers not being available and on compliance with local requirements.
- Seepage pits, cesspools, and dry wells (rat holes) are not permitted.
- No private onsite wastewater system may have a surface discharge.
- Alternative systems may require a local variance; where there is no local code, KDHE may grant a variance.
“Wastewater from a home shall be discharged to a properly designed and maintained septic tank–soil absorption field or wastewater pond, an approved alternative treatment and disposal system, or a permitted sewage treatment plant. Seepage pits, cesspools, and dry wells (rat holes) are not permitted. [...] No private onsite wastewater system shall have a surface discharge.”
MF2214 Minimum Standards for Design and Construction of Onsite Wastewater Systems ↗Re-checked Sep 9, 2026
Well permitLimited
Water-well construction, reconstruction, and plugging in Kansas, including county and city permitting requirements where applicable.
- Many counties require water-well permits, and some cities do as well; the KDHE page reports that 68 counties had responded to its January 2026 poll.
- A well may also need a Division of Water Resources permit, Class V Authorization, Public Water Supplies permit, or another authorization depending on the well.
- Kansas requires well logs for all water-well construction, reconstruction, and plugging statewide.
“Many counties in Kansas require a permit for water wells. Even some cities have permitting requirements. Please look below to see if you need a permit for your well. 68 counties have responded so far, counties not shown below did not respond to our poll. The poll was sent in January of 2026, and will be updated annually.”
Water Well County Permits ↗Re-checked Sep 9, 2026
Driveway accessRequired
Construction or alteration of a driveway connecting to the Kansas state highway system.
- The requirement applies to driveways onto the state highway system.
- No work may be performed on state highway right-of-way until an approved highway permit agreement is received.
- Driveways connecting only to local roads are outside the cited rule's stated scope.
“Individuals desiring to construct or alter a driveway onto the state highway system shall be required to obtain a permit.”
Kansas Administrative Regulations, Volume 3 ↗Re-checked Sep 9, 2026
Building in a floodplainLimited
Statewide Kansas framework governing locally adopted floodplain zones, districts, and floodplain development regulations
- A local governing body may establish floodplain zones and districts; the statute does not itself impose one uniform permit requirement on every development statewide.
- Any floodplain regulations must comply with the minimum requirements of the National Flood Insurance Act of 1968 and rules adopted under it.
- Before adoption, a local ordinance, resolution, regulation, or plan creating or changing a floodplain zone or district, or regulating structures, encroachments, or land uses in the area, must be submitted to the chief engineer of the Kansas Department of Agriculture's Division of Water Resources.
- The chief engineer may require complete maps, plans, profiles, specifications, and textual matter; approval or disapproval is due within 90 days after receipt of all required data, and failure to act within that period results in deemed approval.
- Under K.A.R. 5-44-4, local floodplain zoning regulations must identify flood hazard areas by a specific map, meet or exceed federal minimum requirements, meet or exceed applicable chief-engineer requirements, and designate a local floodplain administrator responsible for reviewing and issuing floodplain development permits.
- K.A.R. 5-44-1 states that its definitions apply in administering K.S.A. 12-766; its listed effective dates are January 1, 1992 and February 17, 1992.
chief engineer review period: 90 days (After receipt of all data required by the chief engineer; failure to approve or disapprove within the period results in deemed approval.) · flood threshold referenced by K.S.A. 12-766: 1% annual chance (The governing body may restrict application to lands adjacent to watercourses subject to floods of a lesser magnitude than that having a one-percent chance occurrence in any one year.)
“The governing body may establish flood plain zones and districts and restrict the use of land therein”
2026 Kansas Statutes, K.S.A. 12-766: Flood plain zones ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Limited — Development in special flood hazard areas under Kansas local floodplain-management ordinances based on the Kansas Department of Agriculture model ordinance.
  “In all areas covered by this ordinance, no development shall be permitted except through the issuance of a floodplain development permit”
  Model Floodplain Management Ordinance ↗Re-checked Sep 26, 2026
Short-term rentalsLimited
Short-term rentals and vacation units or properties regulated by a Kansas municipality during the temporary statutory period from May 15, 2026 through July 25, 2026.
- The temporary rule applied from May 15, 2026 through July 25, 2026.
- No municipality could limit the number of permits or other municipal authorizations or limit rental duration during that period.
- Completed authorization applications had to receive a response within 15 calendar days.
- If the municipality failed to process and respond within 15 calendar days, the application was deemed approved and no additional municipal regulation or code requirement could be imposed as a condition of approval.
- The definition excluded a permanent guest or a person occupying under a contract intended for long-term or permanent occupancy for more than 28 consecutive days within the period.
application response deadline: 15 calendar days (completed municipal authorization applications during the statutory period)
“During such period, all completed applications to a municipality [...] shall be processed by the municipality [...] within 15 calendar days.”
2026 Session Laws of Kansas, Chapter 96: House Bill 2481 ↗Re-checked Sep 9, 2026
county zoning authorityGeneral
Kansas counties adopting zoning regulations for all or any portion of unincorporated county territory.
- The authority is exercised by the board of county commissioners through resolution and under the applicable planning-and-zoning act.
- Permissible subjects include building height, number of stories, building size, lot coverage, yards and open spaces, population density including minimum lot dimensions, building and land uses, and floodplain land use.
- County zoning jurisdiction may cover all or any portion of the unincorporated area; incorporated municipalities have separate statutory zoning jurisdiction.
“The board of county commissioners, by resolution, may provide for the adoption or amendment of zoning regulations for the unincorporated portion of the county in the manner, and for the purposes, provided by this act.”
K.S.A. 19-2960 — Urban areas; zoning regulations ↗Re-checked Sep 26, 2026
county building authorityLimited
Kansas counties' authority to require building permits and regulate construction in unincorporated areas through subdivision regulations
- The county must first adopt a comprehensive plan before adopting subdivision regulations under K.S.A. 19-2961.
- The permit procedures apply to lots divided, subdivided, resubdivided, or replatted within an area governed by the county's subdivision regulations.
- No building authorization may be granted for a structure on a lot subdivided, resubdivided, or replatted after adoption of the regulations unless the statutory approval process is followed.
- Regulations must provide a building-permit procedure for lots divided into not more than two tracts without replatting, unless otherwise provided.
- Permit procedures must account for zoning regulations, adequate street rights-of-way, easements, and improvement of public facilities, and specify a decision time limit.
- The statute permits the final permit decision to be made by the county commission, subject to other law.
maximum tracts for permit without replatting: <= 2 tracts (unless otherwise provided by the county regulations)
“Any regulations adopted by the board of county commissioners with reference to subdividing lots shall provide for the issuance of building permits”
K.S.A. 19-2961 — Subdivision regulations and building permits ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- General — Kansas counties adopting and enforcing building codes in unincorporated portions of the county.
  “Any part of a code adopted pursuant to the provisions of this section may be made applicable, by resolution, either to all unincorporated portions of the county or to any area of the county outside of but within three (3) miles of the nearest point of the corporate limits of any city.”
  K.S.A. 12-3303 — County adoption by reference of codes ↗Re-checked Sep 26, 2026

Inside cities and towns in Washington County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

Camping on your landLimited
Temporary camping at Washington City Campground in Washington City Park.
- The campground is first-come, first-served.
- Guests may stay no more than 30 consecutive nights.
- The rate is $15 per night.
- Electrical and water hookups, a dump site, bathrooms with showers, and potable and non-potable water are provided.
maximum consecutive stay: <= 30 nights · campground rate: 15 USD per night
“Guests may stay no more than 30 consecutive nights.”
Campground - City of Washington, Kansas ↗Re-checked Sep 11, 2026
Manufactured homesLimited
Occupancy of a mobile home, as defined by the City of Washington, within the City of Washington, Kansas.
- A City Council occupancy permit is required.
- The ordinance excludes the listed described lots and blocks from the permitted location area.
- The mobile home must be supported according to manufacturer specifications and have fire-resistant skirting.
- A separate water meter, electric service, and sewer line connected to the city sewer are required.
- The home must be secured by an approved tie-down method and comply with the Kansas Uniform Standards Code for mobile homes and recreational vehicles.
- Minimum setbacks are 25 feet from the front or rear lot line or a side lot line adjacent to a street, and 10 feet from other lot lines.
- At least one off-street parking space is required.
- Within 180 days after permit issuance, an 8-by-8-by-6-foot minimum storage building must be provided.
- The permit fee is $20 and remains valid until relocation or movement outside city limits.
- Before issuance, the governing body contacts owners within 300 feet and determines whether to issue the permit.
front or rear lot-line setback: >= 25 feet (Also applies to any side lot line adjacent to a street.) · other lot-line setback: >= 10 feet · storage building minimum length: 8 x 8 x 6 feet (Required within 180 days after permit issuance.) · permit fee: 20 USD (Permit valid until relocation or movement outside city limits.) · neighbor notification distance: 300 feet (Owners of each tract, lot, or piece of property within this distance are contacted before issuance.)
“It shall be unlawful for any person to park or occupy a mobile home in the City of Washington, Kansas, unless a permit for such occupancy shall be issued by the City Council”
Chapter XVIII. Mobile Homes - City of Washington, Kansas ↗Re-checked Sep 11, 2026

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

Owner-builder exemption — Owner-builder exemptions from building permit, inspection, or occupancy requirements in unincorporated Washington County, Kansas.
Local zoning — Zoning administered by incorporated cities or other local authorities within Washington County, aggregated at the county level.
Minimum dwelling size — Minimum dwelling size in unincorporated Washington County.
Living in an RV — Long-term or overnight RV occupancy on private land in Washington County, including unincorporated areas.
Tiny homes — Occupancy of tiny homes in Washington County, including unincorporated areas.

1 more unanswered

Accessory dwellings

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Washington County, Kansas

Is Washington County a good place to live off-grid or homestead?

Washington County scores 55/100 on the Bolthole Index, a solid county profile. Its strengths: sparse surroundings — about 6,148 people within a 30-minute drive and low administrative friction for a quiet rural property. Watch-outs: workable self-sufficiency basics (31.1″/yr rainfall) and elevated current hazard exposure.

Do you need a building permit in Washington County, Kansas?

Washington County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Washington County Sanitary Code (administered by county Authorized Representative/Health; KDHE Local Environmental Protection Program). These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Washington County, Kansas?

Land in Washington County runs about $2,737 per acre, based on the latest county data.

What is the water situation in Washington County?

Washington County gets about 31.1" of rain a year, with severe drought in roughly 9.1% of years.

How remote is Washington County?

A representative private-land location has about 6,148 people within a 30-minute drive and 770,446 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Building permits, zoning and land rules in Washington County, Kansas

At a glance

Who to call

Do you need a building permit in Washington County, Kansas?

Who handles Washington County building and permit questions?

Does Washington County, Kansas have zoning?

How do septic permits work in Washington County?

Can you live in an RV or tiny home in Washington County?

Building a home in Washington County: steps in order

What should you check before buying Washington County land?

Watch-outs

Sources

Washington County in Kansas

How Washington County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Washington County

Washington County rules

Kansas rules that apply here

Inside cities and towns in Washington County

Still unanswered

Living off-grid in Washington County, Kansas

Is Washington County a good place to live off-grid or homestead?

Do you need a building permit in Washington County, Kansas?

How much does land cost in Washington County, Kansas?

What is the water situation in Washington County?

How remote is Washington County?

How Washington compares in Kansas