Bolthole Index

Johnson County, Missouri

Building permits, zoning and land rules in Johnson County, Missouri

68Index Score / 100
#72 of 115 in Missouri

Unincorporated Johnson County, Missouri requires no county building permit, building inspection or certificate of occupancy outside the Whiteman Air Force Base Zoning Area123. The county has no general zoning there, but city zoning ordinances may apply inside incorporated city limits45. Septic permits (Johnson County Community Health Services), floodplain development permits and driveway permits can still apply on any parcel678.

At a glance

Building permit
Not required in unincorporated areas, except properties inside the Whiteman Air Force Base Zoning Area91
Zoning
None outside the Whiteman AFB Zoning Area; contact the Military Airport Zoning Commission to check that area104
RV and tiny-home living
No county zoning restriction in unincorporated areas outside the Whiteman AFB Zoning Area11
Septic permit
Johnson County Community Health Services - Environmental Health; required for new construction or modification of any OWTS126
Owner-builder
You may build your own home without a county building permit; state trade licensing may still apply13
Floodplain development permit
State and federal rules apply; flood plain maps and construction permits for flood hazard areas are at the Assessor's Office147
Well permit
A non-restricted well installation permit is required for contracted work; landowners may install their own well without a permit15
Minimum size and setbacks
No county zoning minimums outside the Whiteman AFB Zoning Area; septic, floodplain, road and private restrictions can still control siting1617

Who to call

Floodplain permits

Johnson County Assessor's Office

Flood plain maps and construction permits for flood hazard areas, and address/road-number assignment for unincorporated Johnson County

660-747-9822

South Annex, 1310 S. Maguire, Warrensburg, MO 64093

Septic permits

Johnson County Community Health Services, Environmental Health

Onsite wastewater treatment system (OWTS/septic) permits, design and construction-modification approval for Johnson County

(660) 747-6121

723 PCA Rd, Warrensburg, MO 64093

Online permits →

Roads & driveways

Johnson County Clerk's Office

County right-of-way procedures and applications for construction within 30 feet of the center of a county road or trail

660-747-6161

301 W. Market Street, Warrensburg, MO 64093

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Off-grid gear

Going off-grid in Johnson County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Johnson County, Missouri?

No, for almost all unincorporated land. Johnson County requires no building permit, building inspection or certificate of occupancy outside the Whiteman Air Force Base Zoning Area123. Johnson County also has not adopted a building code for that area18. An owner-builder may therefore build a home without seeking a county permit, although state licensing may still apply to electrical, plumbing and HVAC trade work13. Land inside the Whiteman Air Force Base Zoning Area follows its own rules, and inside incorporated city limits the city's zoning ordinances may apply, so call the relevant city hall; the county's septic, floodplain and driveway permit requirements do not move to the city519. All development in a floodplain still requires a floodplain development permit, available through the Johnson County Assessor's Office720.

Who issues floodplain, septic and driveway permits in Johnson County?

Johnson County has no general building department for unincorporated land outside the Whiteman AFB zoning area because it issues no building permits there21. The Johnson County Assessor's Office provides flood plain maps, handles floodplain construction permits for flood hazard areas and assigns addresses and road numbers in the unincorporated county20. Johnson County Community Health Services, Environmental Health, administers onsite wastewater systems countywide2219. County-road driveway permit applications (including field and road entrances) go to the Road and Bridge Department, while work within 30 feet of a county road or trail follows right-of-way procedures through the County Clerk's Office823. Access on a state-maintained route instead requires a MoDOT permit24.

Does Johnson County have zoning?

Johnson County has no countywide zoning for unincorporated land outside the Whiteman Air Force Base Zoning Area4. In that unzoned area, the county sets no zoning minimum for dwelling size or lot size and no zoning limit for setbacks, lot coverage or building height1625172627. Septic, floodplain, road, subdivision and private-covenant restrictions can still control where a structure goes17. The Whiteman area is different: its rules cover specified land within 3,000 feet of the base and within Accident Potential Zones 1 and 2, including district-specific lot sizes, setbacks and heights282930. Subdivision plats in that airport zone require county review and approval before recording or selling lots31.

How do septic permits work in Johnson County?

Johnson County Community Health Services is the county's designated administrator for the design, construction and major modification of every onsite wastewater treatment system (OWTS), and a permit is required for new construction or any modification196. Soils here make that permit essential groundwork rather than paperwork: 0% of Johnson County's land is free of severe limitations for a conventional drain field, so expect a site evaluation to steer you toward an alternative or engineered system almost everywhere in the county32. Missouri doesn't require an inspection or evaluation of an existing system before a sale unless a lender or buyer asks for one, though some counties add their own transaction rule, so confirm Johnson County's practice with Environmental Health directly33. Wastewater can't legally be discharged into a road ditch or onto the ground; whatever system you install has to avoid posing a threat to public health or the environment34.

Can you live in an RV or tiny home on your land in Johnson County?

On unincorporated land outside the Whiteman Air Force Base Zoning Area, Johnson County has no county zoning rule restricting RV occupancy, tiny-home occupancy, manufactured-home occupancy or temporary camping11. Johnson County also sets no zoning minimum dwelling size there16. That answer does not override private subdivision covenants, city rules, the Whiteman airport-zone ordinance, floodplain requirements or sanitation rules4. A new or modified onsite wastewater system still requires approval from Johnson County Community Health Services, and wastewater cannot discharge onto the ground or into a road ditch634.

What are the steps to build a home in Johnson County, in order?

  1. Confirm that the parcel is outside the Whiteman Air Force Base Zoning Area and city limits before relying on the county's no-permit rule1.
  2. Ask the Assessor's Office whether the site is in a mapped flood hazard area; all floodplain development needs a permit207.
  3. Arrange the septic site evaluation and obtain the septic (OWTS) permit from Environmental Health before installing or modifying a system32226.
  4. Identify who maintains the road: use the county process for a county-maintained road and MoDOT's process for a state route824.
  5. For projects disturbing at least 1 acre, or smaller sites within a larger common plan reaching that threshold, budget for Missouri's land-disturbance permit; fees begin at $50035.
  6. Arrange any well installation permit that applies, then build without a county building inspection or occupancy certificate outside the Whiteman area1523.

What should you check before buying land in Johnson County?

Septic is the headline issue here: 0% of the county's soils are free of severe limitations for a conventional drain field, so budget for a site evaluation before treating any parcel as buildable32. Check whether the property is inside the Whiteman Air Force Base Zoning Area or an incorporated city before assuming the county's no-permit and no-zoning rules apply5. If the tract is in a subdivision, obtain its recorded restrictions and covenants; outside the airport zone, we could not confirm a county subdivision-approval rule, so ask the Recorder about the specific plat. Determine whether road access is county, state, city or privately maintained before planning a driveway8. Typical property tax runs about 0.7% effectively, with a median bill near $1,515 a year, on a typical home value around $287,697363738.

Watch-outs

  • Johnson County exists in many states, including Kansas, Indiana, Iowa, Texas and Arkansas; confirm you're looking at Johnson County, Missouri (Warrensburg, west-central Missouri near Whiteman Air Force Base) before trusting a search result1.
  • The county's no-permit, no-zoning statement carries one real exception: land inside the Whiteman Air Force Base Zoning Area is subject to the Military Airport Zoning Commission's own rules, so always confirm your parcel's location before assuming no restrictions apply1.

Sources

  1. Planning & Zoning, quoted and re-checked
  2. Planning & Zoning, quoted and re-checked
  3. Planning & Zoning, quoted and re-checked
  4. Planning & Zoning | Johnson County, MO, quoted and re-checked
  5. Planning & Zoning | Johnson County, MO, quoted and re-checked
  6. Wastewater Treatment, quoted and re-checked
  7. Floodplain Forms, quoted and re-checked
  8. Driveway Permit, quoted and re-checked
  9. Planning & Zoning (2026 county census)
  10. Planning & Zoning | Johnson County, MO (2026 county census)
  11. Missouri law on county zoning and building authority
  12. Wastewater Treatment (2026 county census)
  13. Missouri law on county zoning and building authority
  14. jocomo.gov, quoted and re-checked
  15. Water Wells - PUB2945, quoted and re-checked
  16. Planning & Zoning, quoted and re-checked
  17. Planning & Zoning, quoted and re-checked
  18. Planning & Zoning | Johnson County, MO, quoted and re-checked
  19. Wastewater Treatment, quoted and re-checked
  20. Johnson County Assessor's Office (jocomo.gov)
  21. Planning & Zoning, quoted and re-checked
  22. Johnson County Community Health Services, Environmental Health (johnsoncountyhealth.org)
  23. Johnson County Clerk's Office (jocomo.gov)
  24. Permits, quoted and re-checked
  25. Planning & Zoning, quoted and re-checked
  26. Planning & Zoning, quoted and re-checked
  27. Planning & Zoning, quoted and re-checked
  28. The 2008/2009 Military Airport Zoning Ordinance and Subdivision Regulations for Johnson County, quoted and re-checked
  29. The 2008/2009 Military Airport Zoning Ordinance and Subdivision Regulations for Johnson County, quoted and re-checked
  30. The 2008/2009 Military Airport Zoning Ordinance and Subdivision Regulations for Johnson County, quoted and re-checked
  31. Planning & Zoning, quoted and re-checked
  32. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  33. health.mo.gov, quoted and re-checked
  34. Wastewater Treatment, quoted and re-checked
  35. Construction Land Disturbance Permits, quoted and re-checked
  36. Effective property tax rate: Bolthole Index county data
  37. Median property tax bill: Bolthole Index county data
  38. Typical home value (Zillow): Bolthole Index county data

Written October 9, 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.

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Compared with neighboring counties

Unlike 4 of its 6 neighbors, Johnson County has no countywide zoning.

RuleJohnson CountyHenry CountyLafayette CountyPettis CountyCass CountyBenton CountyJackson County
Building permitNot requiredNot requiredRequiredNot requiredLimitedNot requiredRequired
County zoningNoNoYesYesYesNoYes
Septic permitsCounty Community Health ServicesCounty Health CenterCounty Planning & Economic DevelopmentCounty Health CenterCounty Env. Health Dept.County Health Dept.County Public Works On-Site Wastewater program

County locator

Johnson County in Missouri

68
County map
Johnson County highlighted among the Missouri counties · colored by Index score

How Johnson County scores

Seclusion39100% ev.
Self-Sufficiency60100% ev.
Admin Boringness94100% ev.
Durability61100% ev.
Property Autonomy47100% ev.
Carry Cost76100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$288kTypical home
0.7%Property tax
$4,787Land / acre
41.4"Annual rain
9.6% of yrsSevere drought
15.3 / yr (+12.3)Mid-century 100°F days
18.9 daysMid-century dry spell
2.3" (+6%)Mid-century 1-day rain
1.71×Wildfire change factor
100%Forward climate coverage
$2,066Home insurance / yr
3.9% / yrInsurance growth
1.58%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
57,118People within 30 min
3,142,288People within 2 hr
49,182Radius comparison (15 mi)
66.3People / sq mi
1.3%Federal land
97.2%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
0 acWorkable land screen
24.9%Wooded land
43.4 tonsBiomass / forest ac
55.1°FAvg temp

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Cities and towns in Johnson County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Centerview · Town of Chilhowee · Holden · Kingsville · Leeton

Answers from the rulebook for Johnson County

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

Johnson County rules

  • Building permitNot required

    County building permits for construction in unincorporated Johnson County, Missouri, excluding properties in the Whiteman Air Force Base Zoning Area.

    • The county states that the exception applies to properties located within the Whiteman Air Force Base Zoning Area.
    • City zoning ordinances may apply inside incorporated city limits.
    • Construction in flood plains may require construction permits through the Johnson County Assessor's Office.
    • Onsite wastewater, driveway, and county right-of-way requirements may separately apply.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Owner-builder exemption · follows from the permit answerNot needed

    Unincorporated Johnson County: no county building permit is required, so there is no permit to be exempt from and you may build your own home. State licensing for electrical, plumbing and HVAC work may still apply.

    • The county states that the exception applies to properties located within the Whiteman Air Force Base Zoning Area.
    • City zoning ordinances may apply inside incorporated city limits.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Building code adoptedNot adopted

    County building codes in unincorporated Johnson County, excluding properties within the Whiteman Air Force Base Zoning Area.

    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • State and federal regulations apply to building in flood plains.
    • Federal, state, and local regulations exist for onsite wastewater systems.
    • For driveways connecting to a county road, the county directs applicants to review specifications and complete a Driveway Permit Application.
    • Construction work within 30 feet of the center of a county road or trail is subject to county right-of-way procedures and application.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • InspectionsNot required

    County building inspections for construction in unincorporated Johnson County, Missouri, excluding properties in the Whiteman Air Force Base Zoning Area.

    • The county states that the exception applies to properties located within the Whiteman Air Force Base Zoning Area.
    • City requirements may apply inside incorporated city limits.
    • Separate inspections or approvals may apply to onsite wastewater systems.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Certificate of occupancyNot required

    County certificates of occupancy for construction in unincorporated Johnson County, Missouri, excluding properties in the Whiteman Air Force Base Zoning Area.

    • The county states that the exception applies to properties located within the Whiteman Air Force Base Zoning Area.
    • City requirements may apply inside incorporated city limits.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • County-wide zoningAbsent

    County planning and zoning regulations in unincorporated Johnson County, excluding properties within the Whiteman Air Force Base Zoning Area.

    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    • City zoning ordinances may apply within incorporated city limits.
    • State and federal regulations apply to building in flood plains.
    • Federal, state, and local regulations exist for onsite wastewater systems.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Local zoningVaries (with conditions)

    Countywide aggregate of local zoning: Johnson County reports no county planning and zoning regulations in unincorporated areas outside the Whiteman Air Force Base Zoning Area, while incorporated-city zoning ordinances may apply. This claim does not assert that Johnson County administers municipal ordinances.

    • For unincorporated areas, properties within the Whiteman Air Force Base Zoning Area are excepted from the county's no-zoning statement.
    • Within incorporated city limits, city zoning ordinances may apply; the relevant city hall should be contacted.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “City zoning ordinances may apply; contact the respective city hall (see below for contact information).”
  • Zoning districts · by state lawNot published

    Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Minimum dwelling sizeNone

    Dwellings in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area

    • The county states that the absence of county planning and zoning regulations applies to unincorporated areas except properties within the Whiteman Air Force Base Zoning Area.
    • Septic, floodplain, subdivision, and other applicable state, federal, local, or private restrictions may still apply.
    • Incorporated municipalities may have their own zoning ordinances.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
    One more reviewed finding on this topic
    • None — Minimum dwelling-size zoning controls in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area.
      “does not have planning and zoning regulations”
  • Minimum lot sizeNone

    Minimum lot size under county zoning in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area

    • The county no-zoning statement expressly excepts the Whiteman Air Force Base Zoning Area.
    • Onsite wastewater regulations may affect lot-size considerations.
    • Incorporated municipalities may have separate rules.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
    2 more reviewed findings on this topic
    • None — Minimum lot-size zoning controls in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area.
      “does not have planning and zoning regulations”
    • District specific (with conditions) — Lots and structures in the Whiteman Air Force Base Zoning Area, including its AR-1, AR-2, R-1, R-2, and R-3 districts.
      “For the purpose of promoting health, safety, morals, comfort and the general welfare of the unincorporated portion of the county three-thousand (3,000) feet outward of the Whiteman Air Force Base and within the perimeter of accident potential zones one and two by minimizing exposure to crash hazards and high noise levels generated by military airport operations and to establish only the necessary restrictions to allow for the safe and secure daily activities of both the public and government, the following classes of zoning districts are established: AR-1– Agricultural Residential Zoning District AR-2 – Agricultural Residential (5-acre minimum) Zoning District R-1 – Single-Family Residential Zoning District R-2 – Two-Family Residential Zoning District R-3 – Low-Density Residential Zoning District B-1 – Local Business and Residential Zoning District B-2 – General Business Zoning District B-3 – General Services Zoning District I-1 – Limited Industrial Zoning District CZ – AICUZ Clear Zone Overlay District APZ-1 – AICUZ – APZ 1 Overlay District APZ-2 – AICUZ – APZ 2 Overlay District”
  • SetbacksNone

    County zoning setbacks in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area

    • The county no-zoning statement expressly excepts the Whiteman Air Force Base Zoning Area.
    • Onsite wastewater, floodplain, subdivision, road, and private covenant requirements may impose separate setback or location constraints.
    • Incorporated municipalities may have separate rules.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
    2 more reviewed findings on this topic
    • None — Zoning setbacks in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area.
      “does not have planning and zoning regulations”
    • District specific (with conditions) — Yards/setbacks in residential districts within the Whiteman Air Force Base Zoning Area.
      “The following minimum lot and yard requirements shall apply for all structures: a. Lot Area – Twenty-one thousand, five-hundred (21,500) square feet, exclusive of public right-of-way. b. Lot Width – One hundred (100) feet at right-of-way. c. Lot Depth – One hundred (100) feet. d. Front Yard – Twenty-five (25) feet from right-of-way. e. Rear Yard – Twenty-five (25) feet. f. Side Yard – Twenty (20) feet.”
  • Lot coverageNone

    County zoning lot coverage in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area

    • The county no-zoning statement expressly excepts the Whiteman Air Force Base Zoning Area.
    • Other laws, including wastewater, floodplain, subdivision, and private covenant requirements, may apply.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
    One more reviewed finding on this topic
    • None — Zoning lot-coverage controls in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area.
      “does not have planning and zoning regulations”
  • Building heightNone

    County zoning building-height limits in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area

    • The county no-zoning statement expressly excepts the Whiteman Air Force Base Zoning Area.
    • Airport, state, federal, floodplain, and other non-zoning restrictions may still apply.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
    2 more reviewed findings on this topic
    • None — Zoning building-height controls in unincorporated Johnson County outside the Whiteman Air Force Base Zoning Area.
      “does not have planning and zoning regulations”
    • District specific (with conditions) — Buildings, structures, and fixtures in the Whiteman Air Force Base Zoning Area.
      “All buildings, structures, and fixtures necessary to operate and maintain a building shall have a maximum combined height as defined on the Maximum Height Restriction map in Appendix 4.”
  • Living in an RV · by state lawUnrestricted

    Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Camping on your land · by state lawUnrestricted

    Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Tiny homes · by state lawUnrestricted

    Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Manufactured homes · by state lawUnrestricted

    Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Accessory dwellings · by state lawUnrestricted

    Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding.
    • Properties in unincorporated Johnson County located within subdivisions may be subject to restrictions and covenants governing property use.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”
  • Who permits septicCounty

    Design, construction, and major modification of onsite wastewater treatment systems in Johnson County, Missouri.

    • The county page identifies Johnson County Community Health Services as the administering agency.
    • The state distinguishes other wastewater systems, including systems over 3,000 gallons per day and certain lagoons, as potentially regulated by the Missouri Department of Natural Resources.

    domestic wastewater flow threshold: <= 3000 gallons per day (Missouri DHSS coverage generally applies to systems at or below this threshold; other systems may fall under DNR jurisdiction.)

    “Johnson County Community Health Services is responsible to administer regulations for the design, construction and major modification of all Onsite Wastewater Treatment Systems (OWTS).”
  • Septic permitRequired

    New construction or modification of any onsite wastewater treatment system in Johnson County, Missouri.

    • The county page states permits are required for new construction or modifications to any OWTS.
    • The county page does not state an acreage exemption; the state page identifies possible exemptions for some single-family residential lots, so applicability should be confirmed with the county authority.
    • Work should not begin until a permit is issued or an exemption is confirmed.
    “Permits are required for new construction or modifications to any OWTS.”
  • Off-grid sanitationLimited

    Sanitation through an onsite wastewater treatment system on property in Johnson County where public sewer is unavailable.

    • The system must comply with Johnson County Community Health Services regulations.
    • A permit is required for new construction or modifications to any OWTS according to the county page.
    • Wastewater may not be discharged onto the ground or into a road ditch; the system cannot pose a threat to public health or the environment.
    “Is it legal for wastewater to discharge into a road ditch or onto the ground? No. Your system cannot pose a threat to public health or to the environment.”
  • Subdividing landLimited

    Subdivision of land in the specified unincorporated Johnson County area subject to the Military Airport Zoning Ordinance: land within 3,000 feet outward of Whiteman Air Force Base and within the perimeters of Accident Potential Zones 1 and 2.

    • The subdivision regulations are limited to the described Whiteman Air Force Base airport-zoning area; they are not a countywide subdivision rule.
    • A person creating and recording a subdivision plat must submit the necessary applications to the County.
    • No final plat may be filed with the County Recorder of Deeds until approved by the Planning and Zoning Commission and County Commission.
    • No lots may be sold until the plat has been recorded with the County Recorder of Deeds.
    • The preliminary plat is considered by the Airport Zoning Commission within 30 days of formal acceptance.
    • The Airport Zoning Commission may approve, approve conditionally, or disapprove the preliminary plat.
    • If a final plat application is not filed within one year after Airport Zoning Commission approval, preliminary-plat approval becomes void unless an extension is granted by the Airport Zoning Commission.
    • Properties in unincorporated Johnson County located within subdivisions may also be subject to private restrictions and covenants; the County directs inquiries about those documents to the Johnson County Recorder.

    distance outward from Whiteman Air Force Base: 3000 feet · preliminary plat review period after formal acceptance: 30 days · preliminary plat approval validity before final plat application: 1 year (Unless an extension is applied for and granted by the Airport Zoning Commission)

    “These regulations shall apply to the subdividing of land [...] within the perimeter of accident potential zones one and two of Johnson County, Missouri.”
  • Driveway accessRequired

    New driveway, field entrance, or road entrance access on county-maintained roadways in unincorporated Johnson County

    • Applicants must first determine whether the roadway is maintained by the State of Missouri, a city, Johnson County, or is privately maintained.
    • State-maintained routes are handled by the Missouri Department of Transportation.
    • City streets are handled by the appropriate city hall.
    • Privately owned and maintained roads require coordination directly with neighboring property owners.
    • For county-maintained roadways, applicants must review the county right-of-way ordinance, complete the application, and submit it to the Road and Bridge Department.
    “To apply for a driveway, field entrance, or road entrance permit in the unincorporated areas of Johnson County, Missouri:”
  • Building in a floodplainLimited

    Building in flood plains in Johnson County, including unincorporated areas.

    • State and federal regulations apply.
    • Floodplain maps and construction permits for flood hazard areas are available from the County Assessor's Office.
    “State and federal regulations apply to building in flood plains. Flood plain maps and construction permits for flood hazard areas are available at the Assessor's Office.”
  • Permit processPartial

    Development and construction in unincorporated Johnson County, Missouri, including the Whiteman Air Force Base Zoning Area and flood-hazard areas

    • Johnson County states that unincorporated areas generally have no county planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates.
    • The stated exception is properties located within the Whiteman Air Force Base Zoning Area.
    • State and federal regulations apply to building in flood plains; flood plain maps and construction permits for flood hazard areas are available at the Assessor's Office.
    • For driveways connecting to a county road, applicants must review specifications and complete a Driveway Permit Application.
    • If construction includes working within 30 feet of the center of a county road or trail, county right-of-way procedures and an application apply.
    “At this time, Johnson County, Missouri, does not have planning and zoning regulations, building codes, building permits, inspections, or occupancy certificates for unincorporated areas, except for properties located within the Whiteman Air Force Base Zoning Area.”

Missouri rules that apply here

  • Septic inspectionLimited

    Inspection or evaluation of existing onsite wastewater systems in connection with Missouri real-estate transfers.

    • Local public health agencies generally no longer inspect existing systems for real-estate transfers.
    • A private licensed inspector may perform an inspection or evaluation.
    • A lender, buyer, or other transaction participant may require an assessment.
    • Some local standards may be more stringent than state regulations.
    • Inspections and evaluations are distinct; an inspection includes a hydraulic test, while an evaluation does not.
    “For the most part, local public health agencies no longer inspect existing systems related to real estate transfer. The help of a licensed inspector can be obtained to check the condition of the system.”
    2 more reviewed findings on this topic
    • Not required — Inspection or evaluation of an existing onsite wastewater treatment system before a real-estate transaction in Missouri, including Johnson County unless a local rule provides otherwise.
      “No. However, if a lender or buyer requests an inspection/evaluation, it must be conducted by a licensed individual. Some counties may require an onsite system inspection/evaluation for every real estate transaction. Check with the local permitting authority.”
    • Limited — Inspections of existing onsite sewage systems in connection with property sales statewide in Missouri.
      “Missouri Department of Health and Senior Services' (DHSS) rules governing onsite sewage systems cover minimum construction requirements, system inspections at the time of property sales, and requirements for percolation testers and soil evaluators.”
  • Well permitLimited

    Construction or alteration of a public well serving a Missouri public water system.

    • Public water systems must receive written approval from the Missouri Department of Natural Resources Public Drinking Water Branch before constructing or altering a public well.
    • The requirement does not apply when the system meets the charitable-and-benevolent-organization exemptions in section 640.116, RSMo.
    • Anyone proposing to install a public well must contact the department’s regional office for a well-site survey.
    • The survey addresses minimum isolation or setback distances from known or potential contaminant sources, including septic tanks, sanitary sewer lines, and landfills.
    • Before applying for construction authorization, the public water system must obtain an estimated casing-depth letter from the Missouri Geological Survey Water Resources Center.
    • There is no fee for the well-site-survey and estimated-casing-depth-letter services.
    • Failure to obtain construction authorization may result in approval delays and possibly require the owner to properly plug the well and drill a new one according to 10 CSR 60-3.

    public water system threshold: at least 15 service connections or regularly serves an average of at least 25 individuals daily, at least 60 days per calendar year

    “Public water systems must receive written approval from the PDWB before constructing or altering a public well”
    3 more reviewed findings on this topic
    • Required — Construction or repair of a water well in Johnson County, Missouri.
      “A non-restricted water well installation permit is required to construct or repair a water well in Missouri. [...] Landowners may install their own well or pump without a permit pursuant to the above mentioned law and rules.”
    • Required — A person or contractor conducting regulated work to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a water well, heat-pump well, monitoring well, or related well in Missouri.
      “A non-restricted permit is required to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a well.”
    • Limited — Construction or repair of water wells, installation or replacement of pumps, and associated plumbing and electrical work in Missouri.
      “A non-restricted water well installation permit is required to construct or repair a water well in Missouri.”
  • Agricultural exemptionAvailable (with conditions)

    Farm buildings and farm structures used for agricultural purposes under the county building and land-use restriction provisions of RSMo sections 64.800 to 64.905.

    • The exemption does not apply within incorporated portions of counties.
    • The exemption applies to raising crops, livestock, orchards, or forestry and to specified rice-farming or flood-irrigation impoundments.
    • For farm buildings or farm structures, the area must not be within the area shown on the flood hazard area map.
    • The statute preserves the validity of county ordinances or orders adopted before March 4, 1991.
    • Other laws and local requirements may still apply.

    rice-farming or flood-irrigation berm height: <= 18 inches (small berms placed around a field to hold water for growing rice or flood irrigation)

    “This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes in an area not within the area shown on the flood hazard area map.”
    4 more reviewed findings on this topic
    • Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures as against county fire-protection or fire-prevention ordinances.
      “Notwithstanding any provision of law to the contrary, no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits with respect to the erection, maintenance, repair, alteration, or extension of farm buildings or farm structures.”
    • Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures used for agricultural purposes under RSMo section 64.890, outside incorporated portions of counties and outside areas shown on flood hazard area maps.
      “This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes [...]”
    • Available (with conditions) — Farm buildings and farm structures statewide, with respect to county fire-protection and fire-prevention ordinances.
      “no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits [...]”
    • Available — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures with respect to county fire-protection or fire-prevention ordinances.
      “Notwithstanding any provision of law to the contrary, no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits with respect to the erection, maintenance, repair, alteration, or extension of farm buildings or farm structures.”
  • Permit feesPublished (with conditions)

    Missouri construction land-disturbance stormwater permits applicable to qualifying projects in Johnson County.

    • Applies to construction disturbance activities of one or more acres, or less-than-one-acre activities that are part of a larger common plan of development or sale reaching one or more cumulative acres.
    • MO-RAxxxxx applications use the Missouri Gateway for Environmental Management ePermitting system.
    • The current permit expires February 7, 2027; projects continuing after that date require a new permit on or after February 8, 2027, with another fee.
    • No fee refund is granted for a duplicative permit request made before February 8, 2027.

    disturbed acreage: 1 - < 5 acres · permit fee: 500 USD (for 1 - < 5 acres disturbed) · disturbed acreage: 5 - < 10 acres · permit fee: 600 USD (for 5 - < 10 acres disturbed) · disturbed acreage: 10 - 25 acres · permit fee: 750 USD (for 10 - 25 acres disturbed) · disturbed acreage: 25 - < 100 acres · permit fee: 1500 USD (for 25 - < 100 acres disturbed) · disturbed acreage: 100 - < 500 acres · permit fee: 3000 USD (for 100 - < 500 acres disturbed) · disturbed acreage: 500+ acres · permit fee: 5000 USD (for 500 acres or more disturbed)

    “Permit Fees Acreage Disturbed | Permit Fee 1 - < 5 acres | $500 [...] 500 acres + | $5,000”
    2 more reviewed findings on this topic
    • Published (with conditions) — Missouri Department of Natural Resources air construction permits statewide.
      “Construction permit fees include a filing fee and an hourly processing fee. The filing fee is dependent on the type of construction permit.”
    • Published (with conditions) — Missouri onsite wastewater treatment system construction, modification, and repair application fees administered under the statewide DHSS OWTS program.
      “Effective August 28, 2026, [...] the application fees associated with on-site sewage disposal system construction, modifications, and repairs will be temporarily suspended.”
  • county zoning authorityLimited

    Missouri county zoning authority over unincorporated land.

    • RSMo § 64.850 applies to counties of the first class without a charter and counties of the second, third, or fourth class.
    • RSMo § 64.620 applies to counties of the second or third class to which §§ 64.510–64.690 apply.
    • Adoption under §§ 64.510–64.690 requires approval by vote of the people under § 64.530.
    • The authority applies in unincorporated portions and not incorporated portions.
    • The regulations must be in accordance with a comprehensive plan.
    • Under § 64.090, the zoning power does not apply to raising crops, livestock, orchards, or forestry; seasonal or temporary rice-farming or flood-irrigation impoundments; specified farm structures outside mapped flood-hazard areas; or underground mining entered through shafts outside mapped flood-hazard areas.
    • Existing lawful uses and specified public-utility services are protected under the cited statutory schemes.
    “the county commission of any county of the first class not having a charter form of government, or of any county of the second, third or fourth class may, after approval by vote of the people as provided in section 64.845, regulate and restrict, by order of record, in the unincorporated portions of the county, the height, number of stories, and size of buildings, the percentage of lots that may be occupied, the size of yards, courts and other open spaces, the density of population, the location and use of buildings, structures and land for trade, industry, residence or other purposes.”
    2 more reviewed findings on this topic
  • county building authorityLimited

    County authority to regulate residential construction and issue building permits in unincorporated areas of Missouri.

    • The authority under sections 64.170 to 64.200 applies to counties of the first and second classification.
    • A county that had not adopted a building code before August 28, 2001, must obtain voter approval before adopting one under those sections.
    • Only voters in the area affected by the proposed code may vote; incorporated-territory citizens cannot vote on a code affecting a county.
    • The county commission must hold at least three public hearings and provide the statutory newspaper publication and county posting notices before adoption.
    • Regulations adopted under section 64.180 apply to unincorporated territory, except as otherwise provided.
    • Adopted or amended codes after August 28, 2001, must use a current, calendar year 1999 or later edition of a nationally recognized building code, as amended.
    • A county building ordinance may not conflict with liquefied petroleum gas installations governed by section 323.020.

    public hearings before adoption: >= 3 hearings minimum (Section 64.180(3)) · newspaper notice: >= 15 days (Notice of hearing time and place must be published in at least two newspapers having general circulation within the county) · posted notice: >= 15 days (Notice must be posted in four conspicuous places in the county) · minimum nationally recognized building-code edition: >= calendar year 1999 edition year (Applies after August 28, 2001, under section 64.180)

    “The regulations adopted shall be applicable to the unincorporated territory of the county, except as otherwise provided herein”
    2 more reviewed findings on this topic
    • Limited — County regulation of construction and issuance of building permits for buildings, including residential construction, in Missouri counties, with the practical focus on county-controlled areas outside incorporated territory.
      “the county commission in all counties of the first and second classification [...] is for this purpose empowered [...] to adopt [...] regulations to control the construction”
    • Limited — Missouri counties' authority to require permits and regulate residential construction in unincorporated areas.
      “Before the adoption of such code of regulations, the county commission shall hold at least three public hearings thereon”

Still unanswered

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

  • Mandatory utility hookup — Required connection to public water or sewer systems for property in Johnson County, Missouri.
  • Short-term rentals — Short-term rental operation in Johnson County, Missouri, including unincorporated areas.

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 Johnson County, Missouri

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

Johnson County scores 68/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: about 57,118 people within a 30-minute drive.

Do you need a building permit in Johnson County, Missouri?

Johnson 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 Johnson County Community Health Services - Environmental Health. Owner-builders may act as their own contractor to build their home. 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.

Can you live in an RV or tiny home on your land in Johnson County?

Living in an RV on your own land in Johnson County is allowed: Unincorporated Johnson County: no county rule sets this, because Johnson County's own reviewed answer confirms it has no county-wide zoning ordinance. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Properties within the Whiteman Air Force Base Zoning Area are excepted from this absence finding. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Johnson County, Missouri?

Land in Johnson County runs about $4,787 per acre, based on the latest county data.

What is the water situation in Johnson County?

Johnson County gets about 41.4" of rain a year, with severe drought in roughly 9.6% of years.

How remote is Johnson County?

A representative private-land location has about 57,118 people within a 30-minute drive and 3,142,288 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.

How Johnson compares in Missouri

Compare side-by-side →See all 115 Missouri counties ranked →