Bolthole Index

Adair County, Missouri

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

79Index Score / 100
#8 of 115 in Missouri

Unincorporated Adair County, Missouri does not require a county building permit for a home1. Inside Kirksville and Novinger, city building permits are required2,3. Kirksville administers municipal zoning; unincorporated Adair County’s full zoning status could not be confirmed2,4.

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

Adair County's rules for living in an RV, temporary camping, tiny-home occupancy and accessory dwellings on private land could not be confirmed, so the safe answer is to ask the County Commission about the exact parcel and proposed use.

Adair County's rules for living in an RV, temporary camping, tiny-home occupancy and accessory dwellings on private land could not be confirmed, so the safe answer is to ask the County Commission about the exact parcel and proposed use5. Inside Kirksville, zoning districts and the city's zoning ordinance govern land use, and a new structure or placement of a mobile home requires a city building permit2. A tiny home or RV also does not avoid wastewater rules: homes without public sewer rely on an OWTS, and qualifying systems require state approval6. For water, Missouri allows landowners to install their own well or pump without a permit, while a person hired to perform the work needs the applicable restricted permit7.

What should you check before buying land in Adair County?

Before buying an Adair County property with an existing septic system, ask whether the buyer or lender requires an inspection; private real-estate assessments must be performed by a person licensed by Missouri DHSS, an inspection is not established as a universal requirement for every sale.

Before buying an Adair County property with an existing septic system, ask whether the buyer or lender requires an inspection; private real-estate assessments must be performed by a person licensed by Missouri DHSS, an inspection is not established as a universal requirement for every sale11. Check soils before assuming a conventional drain field will work: no mapped Adair County soils are rated “not limited,” so site evaluation or an alternative design may be needed10. Confirm the septic-permit category with DHSS because lot size, lake adjacency, system spacing, wastewater type and design flow affect requirements6. Inside Kirksville, budget for building-permit fees and confirm zoning and any special-use approval before closing2,12,13. Verify floodplain status and the community development-permit path before moving dirt14. Confirm whether access needs a MoDOT driveway permit, then follow the County Clerk’s E-911 address sequence8,15.

Watch-outs

  • Septic permitting authority for Adair County recently moved from the county to the state; older references to the county health department issuing OWTS permits are out of date, and applicants should contact Missouri DHSS directly16.
  • Unincorporated Adair County does not require a county home building permit, but building inspections and certificate-of-occupancy requirements could not be confirmed; ask the County Commission before construction1.
  • Adair County's countywide rules on RV occupancy, tiny homes, minimum lot size, setbacks and building height could not be confirmed; ask the County Commission rather than assuming no rule applies5.
  • Kirksville’s Airbnb approval for 2701 Sunset Cove Drive prohibits renting the entire property and requires the owner to stay overnight while guests occupy rooms; ask Codes and Planning about the proposed rental use at your own address17.

Sources

17 official pages, each quoted and re-checked · written October 12, 2026

  1. State of Missouri - County Building Codes dataset (2026 county census)
  2. Kirksville: Kirksville Code § 44-4 — Building permits, certificates of occupancy and fees (Adair County)
  3. Novinger: Chapter 502 Building Permits — City of Novinger, Missouri (Adair County)
  4. Adair County Missouri Government
  5. Adair County, Missouri (official) (2026 county census)
  6. OWTS Construction Permit Process
  7. Water Wells - PUB2945 | Missouri Department of Natural Resources
  8. E-911 Address Request Application
  9. revisor.mo.gov
  10. 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
  11. Onsite Sewage | Adair County Health Department
  12. Exhibit A - Fee Schedule 2026
  13. City of Kirksville - Codes and Planning
  14. Floodplain Forms
  15. Permits | Missouri Department of Transportation (Missouri statewide rule)
  16. Onsite Sewage | Adair County Health Department
  17. Special Use Permit to Operate an Airbnb

Written October 12, 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

Like 4 of its 6 neighbors, Adair County requires no county building permit for a home.

RuleAdair CountySchuyler CountyMacon CountyKnox CountySullivan CountyPutnam CountyScotland County
Building permitNot requiredLimitedNot requiredLimitedNot requiredNot requiredNot required
County zoningNoNot publishedNoNot publishedNot publishedNot publishedNot published
Septic permitsDHSSDHSSDHSSMO Dept. of Health & Senior ServicesMO Dept. of Health & Senior ServicesDHSSMO DHSS Onsite Wastewater Treatment Program

County locator

Adair County in Missouri

79
County map
Adair County highlighted among the Missouri counties · colored by Index score

How Adair County scores

79 / 100 · #8 of 115 in Missouri · six factors, land price, tax, rain and climate

Seclusion69100% ev.
Self-Sufficiency58100% ev.
Admin Boringness8790% ev.
Durability65100% ev.
Property Autonomy47100% ev.
Carry Cost81100% 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 →

$198kTypical home
0.8%Property tax
$4,098Land / acre
40.7"Annual rain
7.6% of yrsSevere drought
7.6 / yr (+6.7)Mid-century 100°F days
16.5 daysMid-century dry spell
1.95" (+7.8%)Mid-century 1-day rain
1.88×Wildfire change factor
100%Forward climate coverage
$1,725Home insurance / yr
3.6% / yrInsurance growth
1.72%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
26,006People within 30 min
576,171People within 2 hr
28,251Radius comparison (15 mi)
44.3People / sq mi
0.3%Federal land
63.7%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
0 acWorkable land screen
31.4%Wooded land
32.3 tonsBiomass / forest ac
52°FAvg temp

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Cities and towns in Adair 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 covered: Village of Gibbs · Village of Millard

Answers from the rulebook for Adair County

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

Adair County rules

  • Local zoningVaries (with conditions)

    Aggregate local-zoning status across Adair County, including incorporated City of Kirksville and county areas; the county aggregate does not imply that Adair County administers municipal zoning.

    • Kirksville administers zoning within city limits through its City Planner, Planning and Zoning Commission, and City Council.
    • Kirksville rezoning requires an application, fee, public notice at least 15 days before the hearing, and Planning and Zoning Commission and City Council action.
    • Adair County states that it currently has no zoning regulations for development of large-scale facilities; the source does not resolve all other unincorporated land-use controls.

    Kirksville rezoning public notice lead time: >= 15 days

    “To rezone any parcel of land within the City of Kirksville, the applicant must submit the following documents to the City Planner:”
  • Septic inspectionLimited

    Inspection of an onsite wastewater treatment system in Adair County, particularly during a real-estate transaction.

    • The county health department describes inspection as commonly required by a buyer or lending institution, not as a universal inspection requirement.
    • Any such inspection must be conducted by a person licensed to inspect or evaluate onsite systems.
    “Individuals must be licensed by the Missouri Department of Health and Senior Services to perform private assessments of existing systems for real estate transactions.”
  • Off-grid sanitationLimited

    Onsite wastewater treatment used where public sewer is unavailable in portions of Adair County.

    • The county health department states that homes in portions of Adair County without public sewer rely on OWTS.
    • Permit, setback, effluent, contamination, nuisance, and installer-registration conditions apply as stated in the septic-permit claim.

    minimum setback from property line for permit-exempt system points: >= 10 feet

    “Homes in portions of Adair County that are without public sewer systems rely on onsite wastewater treatment systems (OWTS) to treat wastewater”
  • Driveway accessLimited

    New construction requiring an Adair County E-911 address.

    • The driveway and structure location must be marked before an address can be given if the request concerns new construction.
    • An address marker must be paid for in advance at a cost of $35.00 to the Adair County Treasurer.
    • The source describes the E-911 addressing prerequisite and does not establish a general driveway-construction permit requirement.

    address marker fee: 35 USD

    “Address marker must be paid in advance at a cost of $35.00 to the office of the Adair County Treasurer. Driveway and structure location must be marked before address can be given if this is new construction.”
    One more reviewed finding on this topic
    • Required — Obtaining an Adair County E-911 address for new construction.
      “Address marker must be paid in advance at a cost of $35.00 [...] Driveway and structure location must be marked before address can be given”
  • County-wide zoningAbsent

    Adair County's official government site lists no planning and zoning department, and it is a non-charter rural county with no county-wide zoning ordinance found.

    Adair County, Missouri (official) ↗From the county’s own site, awaiting a second reviewer

Missouri rules that apply here

  • Building permitLimited

    Building permits for construction in Missouri: no statewide permit is shown; first and second classification counties may adopt building regulations and permits if voters have approved

    • Authority is an option for county commissions in counties of the first and second classification, not a statewide mandate
    • A county that had not adopted a building code before August 28, 2001 needs voter approval, voted only by voters outside incorporated territory
    • Municipalities and other counties must be checked locally
    • This claim is about the county enabling authority only; the state septic rule (RSMo 701.031) was not used as a building-permit requirement
    “the county commission in all counties of the first and second classification, as provided by law, is for this purpose empowered, subject to the provisions of subsections 2 and 3 of this section, to adopt by order or ordinance regulations to control the construction”
  • Owner-builder exemptionAvailable (with conditions)

    A property owner installing, modifying, or repairing that owner's on-site sewage disposal system.

    • The owner must comply with RSMo 701.025 to 701.059.
    • The statute separately provides that an owner need not obtain a permit or contractor registration merely to clean that owner's on-site sewage disposal system.
    “Nothing in sections 701.053 to 701.055 shall preclude property owners from installing, modifying or repairing their own on-site sewage disposal system”
  • Building code adoptedPartial

    Missouri statewide legal framework for building-code adoption by counties and other communities; the statutes authorize local adoption rather than establishing one uniformly adopted statewide building code.

    • County authority under RSMo 64.170 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 under RSMo 64.170 to 64.200.
    • The adoption vote is limited to voters in the affected area; a code affecting a county is not voted on by citizens of incorporated territory.
    • A county adopting under RSMo 64.180 must use a current nationally recognized building code edition from calendar year 1999 or later, as amended.
    • A county building ordinance may not conflict with liquefied petroleum gas installation requirements governed by RSMo 323.020.
    • A community may incorporate a code by reference only if it otherwise has legal power to adopt the ordinance.
    • A code incorporated by reference must be filed with the community clerk and available for public inspection for 90 days before adoption.
    • An ordinance adopting a code by reference must state the penalty separately rather than incorporate the penalty by reference.
    • RSMo 67.280 defines community to include any county, fire protection district, or municipality, and municipality to include an incorporated city, town, or village.
    “Because fire and building codes are adopted at the local level in Missouri”
    2 more reviewed findings on this topic
  • InspectionsLimited

    Construction, major modification, or major repair of an on-site sewage disposal system for which RSMo 701.046 requires notice and an application; this is not a general statewide inspection rule for all buildings.

    • The city, county, or department must receive notice and an opportunity to inspect before completion.
    • A registered contractor must notify the authority before 9:00 a.m. on the day before completion; an unregistered person must notify it before 9:00 a.m. on the second day before completion.
    • The system must remain available for a complete inspection under the state standard until 3:00 p.m. on the completion day unless the authority confirms earlier inspection and approval.
    • The system may not be closed or completed if inspection finds it does not meet the state standard; the authority must provide conspicuous notice at inspection and written confirmation of the result, or of no inspection, within three working days of completion.
    “without providing notice and an opportunity for inspection by the city, county or department as provided in this section.”
  • Zoning districtsPartial

    Missouri statutory authority for counties to create zoning districts in unincorporated territory; this does not establish or publish the actual zoning districts for any particular county.

    • The statute applies to unincorporated territory of counties subject to sections 64.211 to 64.295.
    • Actual district boundaries, regulations, and maps depend on county adoption and are not supplied by this statewide statute.
    • District regulations must be uniform for each class or kind of building or land use within each district, although regulations may differ between districts.
    • The regulations must be made in accordance with a comprehensive plan.
    “the unincorporated territory may be divided into districts of such number, shape and area as may be deemed best suited”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Potential county zoning controls on the size of residential buildings in unincorporated portions of first-class counties other than first-class counties without a charter form of government.

    • The county commission is authorized to regulate by order in accordance with a comprehensive plan.
    • The statute does not state a statewide minimum dwelling-size measurement.
    • The statute expressly excludes incorporated portions of counties and identifies additional agricultural, rice-farming, flood-irrigation, farm-structure, and underground-mining exclusions.
    “except in counties of the first class not having a charter form of government [...] in the unincorporated portions of the county [...] size of buildings”
  • SetbacksSpecified

    Size of yards, courts and other open spaces in unincorporated portions of second- and third-class counties with county zoning; setbacks left to such counties

    • Power exists only for counties to which sections 64.510 to 64.690 apply under section 64.510
    • Exercised only after approval by vote of the people as provided in section 64.530
    • Must be done by order of record and in accordance with a comprehensive plan
    • Applies only to unincorporated portions of the county
    • Does not apply to crops, livestock, orchards, forestry, or farm buildings used for such purposes outside the flood hazard area map area
    • Existing lawful uses protected; ordinances adopted before March 4, 1991 unaffected
    “the size of yards, courts and other open spaces”
  • Lot coverageSpecified

    Percentage of lots that may be occupied in unincorporated portions of second- and third-class counties with county zoning; lot coverage left to such counties

    • Power exists only for counties to which sections 64.510 to 64.690 apply under section 64.510
    • Exercised only after approval by vote of the people as provided in section 64.530
    • Must be done by order of record and in accordance with a comprehensive plan
    • Applies only to unincorporated portions of the county
    • Does not apply to crops, livestock, orchards, forestry, or farm buildings used for such purposes outside the flood hazard area map area
    • Existing lawful uses protected; ordinances adopted before March 4, 1991 unaffected
    “the percentage of lots that may be occupied”
  • Camping on your landLimited

    Developments where land is sold or leased for camping in recreational vehicles (recreational developments) under the state wastewater rule 10 CSR 20-6.030; this is a wastewater-disposal rule, not a zoning rule on camping generally

    • Applies only when land is sold or leased for the purpose of camping in recreational vehicles.
    • To qualify as a recreational development, restrictive covenants must prohibit continuous year-round living on the lot, and no cabins or other structures that could be used for year-round residential purposes are allowed.
    • Minimum lot size of 20,000 sq ft applies where individual on-site wastewater treatment facilities are used; no reduction from the minimum lot size determined by the geohydrologic evaluation, though a one-half reduction as indicated by the soils report may be allowed.
    • Where sewage dump stations provide collection and treatment, they count as centralized collection and treatment.
    • The developer must submit a copy of the restrictive covenants with any plans for dump stations or centralized systems.
    • Any residential housing development required to obtain department approval must get written approval before sale or lease of any lot or start of construction.
    • Rule text says it does not preclude local, municipal, county or other lawful authority from adopting equal or more stringent subdivision, sewer or on-site system regulations.
    • Rule was last amended with an effective date of Jan. 30, 2025.
    • The state rule does not itself regulate temporary camping on private land outside such developments; that is left to local zoning.

    minimum lot size, recreational development with individual on-site wastewater treatment: >= 20000 square feet (one-half reduction per soils report may be allowed; no reduction from geohydrologic evaluation minimum)

    “a development is considered recreational when land is sold or leased for the purpose of camping in recreational vehicles. in order to be considered a recreational development, restrictive covenants must prohibit continuous year-round living on the lot and no cabins or other structures will be allowed that could be used for year-round residential purposes.”
  • Who permits septicMixed (with conditions)

    Onsite wastewater treatment systems statewide in Missouri.

    • DHSS administers minimum standards and permits through DHSS, local contract authorities, or local authorities operating under ordinance.
    • County or city governments may adopt standards stricter than the state standard.
    • DNR regulates lagoons serving anything other than single-family residences, systems discharging to surface waters, systems treating flows greater than 3,000 gallons per day and dispersing through soil absorption systems, and industrial wastewater systems.
    • DNR approval is required for subdivisions, mobile home parks, and campgrounds when OWTS use is planned.

    domestic wastewater flow threshold: <= 3000 gallons per day (DNR regulates systems with flows greater than 3,000 gallons per day when wastewater is dispersed through soil treatment or absorption systems)

    “DHSS OWTS permitting falls under one of three authority types: DHSS Onsite Program, Local Authority (contract), or Local Authority via Ordinance. The application process varies by permitting authority.”
    2 more reviewed findings on this topic
    • State — Onsite wastewater treatment systems in Adair County under Missouri's statewide onsite sewage law and associated rules.
      “Agency: DHSS [...] Authority Type: DHSS [...] County: Adair”
    • Mixed — Missouri wastewater treatment systems, including domestic onsite systems, larger-flow systems, direct discharges, lagoons, subdivisions, and industrial wastewater.
      “In Missouri, different state and local agencies are responsible for regulating wastewater treatment systems.”
  • Septic permitLimited

    On-site wastewater treatment systems in Adair County, including systems serving single-family residences and other domestic wastewater systems within Missouri Department of Health and Senior Services jurisdiction.

    • Missouri DHSS is the permitting authority listed for Adair County; permit applications require an application number requested through the DHSS process.
    • A construction permit is required before installing or repairing most onsite wastewater treatment systems.
    • For Adair County, a permit is required when the property is smaller than three acres or is adjacent to a public utility lake or Corps of Engineers property.
    • A qualifying single-family residence lot of three acres or more may be excluded from the state onsite-sewage provisions.
    • A qualifying residential lot of ten acres or more may be excluded only when no single-family residence onsite sewage disposal system is within 360 feet of another onsite sewage disposal system and there is no more than one single-family residence per each ten acres in the aggregate.
    • The ten-acre exemption does not apply to lots adjacent to lakes operated by the Corps of Engineers or by a public utility.
    • For an exemption, all points of the system must be in excess of ten feet from every adjoining property line; no effluent may enter adjoining property, contaminate surface water or groundwater, or create a nuisance as determined by a readily available scientific method.
    • Regardless of whether a permit is required, anyone installing an onsite sewage disposal system must be registered with the Missouri Department of Health and Senior Services.
    • Effective August 28, 2026, application fees for onsite sewage disposal system construction, modifications, and repairs are temporarily suspended under the DHSS page's stated RSMo 701.046 update.
    • DHSS jurisdiction covers single-family residential systems and onsite or cluster systems treating domestic wastewater flows of 3,000 gallons per day or less through soil treatment or absorption systems.
    • The Missouri Department of Natural Resources regulates lagoons serving anything other than single-family residences, systems discharging to surface waters, systems with flows greater than 3,000 gallons per day dispersed through soil treatment or absorption systems, and industrial wastewater systems.
    • DNR approval is required for subdivisions, mobile home parks, and campgrounds if onsite wastewater treatment systems are planned.

    permit-required property size threshold: < 3 acres (Adair County Health Department states a permit is required for construction of an OWTS if the property is smaller than three acres.) · Corps/public-utility lake adjacency: true (A permit is required if the property is adjacent to a public utility lake or Corps of Engineers property.) · qualifying residential-lot exemption threshold: >= 10 acres (Requires no single-family residence OWTS within 360 feet of another OWTS and no more than one single-family residence per ten acres in the aggregate; unavailable for lots adjacent to Corps-operated or public-utility lakes.) · separation from adjoining property lines: > 10 feet (All points of an exempt system must be in excess of ten feet from adjoining property lines.) · nearby onsite system separation for ten-acre exemption: >= 360 feet (No single-family residence OWTS may be located within 360 feet of another OWTS.) · maximum domestic wastewater flow within DHSS jurisdiction: <= 3000 gallons per day (Greater flows and other listed wastewater categories fall under DNR.)

    “A permit is required for construction of an OWTS if the property is smaller than three acres, or if it is adjacent to a public utility lake or Corp of Engineers property.”
    5 more reviewed findings on this topic
    • Required — Construction of an onsite wastewater treatment system in Adair County when the property is smaller than three acres or adjacent to a public utility lake or Corps of Engineers property.
      “A permit is required for construction of an OWTS if the property is smaller than three acres, or if it is adjacent to a public utility lake or Corp of Engineers property. Due to the recent change in onsite program authority, to obtain a permit, you should now contact the Missouri Department of Health and Senior Services at 573-751-6095.”
    • Required — OWTS serving non-residential structures in Adair County, regardless of property size.
      “Regardless of the size of the property, a permit is necessary for all other onsite systems that serve non-residential structures.”
    • Required — Installing or repairing most onsite wastewater treatment systems in Missouri, including residential systems subject to state permitting.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
    • Required — Installing or repairing most onsite wastewater treatment systems statewide in Missouri.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
    • Required — Proposed campgrounds, mobile home parks, and subdivisions planning to use onsite wastewater treatment systems anywhere in Missouri.
      “DNR must approve subdivisions, mobile home parks and campgrounds if the use of OWTS is planned.”
  • 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
    • Limited — Water-well construction, repair, pump installation, and contracted well work in Adair County under Missouri's statewide well-construction rules.
      “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.”
  • Mandatory utility hookupSewer (with conditions)

    Missouri state law preserves the authority of specified local governments and districts that own or operate a sewage-collection-and-treatment sewer system to require connection by owners of houses, buildings, or other facilities within that entity's territory.

    • This is an authorization for the applicable city, town, village, sewer district, public water supply district, municipality, political subdivision, or district; it is not a statewide mandate that every property connect.
    • The entity must own or operate a sewer system providing collection and treatment of sewage.
    • The house, building, or other facility must be within the municipality, political subdivision, or district.
    • The sewer system must be available.
    • The statute identifies sewer districts organized under chapter 204 or chapter 249 and public water supply districts organized under chapter 247 among the entities whose authority is preserved.
    “to require the owners of all houses, buildings or other facilities [...] to connect to the sewer system [...] when such sewer system is available.”
  • 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.”
    6 more reviewed findings on this topic
    • Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures in Adair County insofar as county fire-protection or fire-prevention ordinances are concerned.
      “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.”
    • Conditional — Raising crops, livestock, orchards, or forestry, and erection, maintenance, repair, alteration, or extension of farm buildings or farm structures in counties subject to Missouri Revised Statutes § 64.620, including unincorporated areas, when the statutory conditions are met.
      “The provisions of this section shall not apply to the incorporated portions of the counties, or to the raising of crops, livestock, orchards, or forestry, or to seasonal or temporary impoundments used for rice farming 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.”
    • 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.”
  • Subdividing landLimited

    Subdivision plats in the unincorporated areas of counties covered by RSMo section 64.070 after the county commission adopts subdivision regulations.

    • The county commission must first adopt subdivision regulations.
    • The plat must first be submitted to the planning commission.
    • If the county planning commission does not report upon the plat within thirty days, it may then be deemed approved.
    • If amended or rejected by the planning commission, the action may be overruled and the plat approved only by the county commission, with the reasons for overruling spread upon the county commission minutes.
    • The recorder of deeds may not record the plat until receiving a certificate of authority from the county zoning enforcement officer.
    • The statute also permits a county planning commission, upon written request of an incorporated area's legislative body where there is no municipal planning commission, to pass upon subdivision plats within that incorporated area; those plats are subject to county planning commission rules and approval procedures.

    planning commission reporting period: 30 days (If no report is made, the plat may then be deemed approved.)

    “After the county commission shall have adopted such subdivision regulations, no plat of a subdivision of land within the unincorporated area of such county [...]”
    One more reviewed finding on this topic
    • Limited — Subdivision regulations adopted by Missouri cities, towns, or villages under RSMo section 89.410.
      “The planning commission shall recommend and the council may by ordinance adopt regulations governing the subdivision of land within its jurisdiction.”
  • Building in a floodplainLimited

    Projects including mining, dredging, building construction, and other dirt-moving activities in designated flood hazard areas within participating Missouri jurisdictions.

    • The source describes local county or city flood damage reduction ordinances rather than one uniform statewide ordinance.
    • The project must be within a participating jurisdiction.
    • The project must be within a designated flood hazard area.
    • The cited rule does not apply if either condition is absent.
    • Covered projects must not raise flood heights.
    “Some jurisdictions (for example, county, city) require any projects in certain floodplains do not raise flood heights.”
    2 more reviewed findings on this topic
    • Required — Development in a floodplain in unincorporated Adair County, subject to the applicable community floodplain process.
      “Regardless, some type of permit MUST be issued for ALL development in the floodplain. An Engineering “No-Rise” Certificate is required for all proposed development in the regulatory floodway, and must be obtained by the community before the floodplain development permit may be issued.”
    • Required — All development in a Missouri floodplain, administered through the applicable community floodplain permitting process.
      “Regardless, some type of permit MUST be issued for ALL development in the floodplain.”
  • Permit feesPublished (with conditions)

    Missouri Department of Natural Resources air construction permits statewide.

    • Fees apply to air construction permits, not to every Missouri building or land-use permit.
    • Construction permit fees include a filing fee and an hourly processing fee.
    • The filing fee depends on the type of construction permit.
    • The listed fees are effective January 1, 2026.
    • Fees applicable until December 31, 2025 are available on the Air Construction Permit Fees white sheet.
    • A convenience fee is charged for electronic payment.

    portable source relocation filing fee: 300 USD · minor permit filing fee: 300 USD · minor permit processing fee: per 100 USD (hour) · general permit filing fee: 700 USD · new source review filing fee: 6000 USD (plus $100 per hour processing fee) · prevention of significant deterioration filing fee: 6000 USD (plus $100 per hour processing fee) · hazardous air pollutant filing fee: 6000 USD (plus $100 per hour processing fee) · temporary or pilot filing fee: 250 USD (plus $100 per hour processing fee)

    “Construction permit fees include a filing fee and an hourly processing fee. The filing fee is dependent on the type of construction permit.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Missouri construction land-disturbance stormwater general permits applicable to qualifying projects in Adair County.
      “Permit Fees Acreage Disturbed | Permit Fee 1 - < 5 acres | $500 5 - < 10 acres | $600 10 - 25 acres | $750 25 - < 100 acres | $1,500 100 - < 500 acres | $3,000 500 acres + | $5,000”
    • 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.”
  • Permit processPublished (with conditions)

    Construction land-disturbance activities in unincorporated Adair County that disturb one or more acres, or less than one acre when part of a larger common plan of development or sale reaching one cumulative acre.

    • The permit is a Missouri Land Disturbance Stormwater General Operating Permit obtained through the MoDNR ePermitting system.
    • The main requirement is a stormwater pollution prevention plan with site-specific best management practices.
    • The current permit expires February 7, 2027; projects continuing after that date require a new permit on or after February 8, 2027, effective for five years, with another fee.
    • Permit fees are $500 for 1 to under 5 acres, $600 for 5 to under 10 acres, $750 for 10 to 25 acres, $1,500 for 25 to under 100 acres, $3,000 for 100 to under 500 acres, and $5,000 for 500 acres or more.

    land disturbance threshold: >= 1 acre (Less than one acre also requires a permit when part of a larger common plan of development or sale reaching one cumulative acre.) · permit fee, 1 to under 5 acres: 500 USD · permit fee, 5 to under 10 acres: 600 USD · permit fee, 10 to 25 acres: 750 USD · permit fee, 25 to under 100 acres: 1500 USD · permit fee, 100 to under 500 acres: 3000 USD · permit fee, 500 acres or more: 5000 USD

    “Land disturbance permits are required for construction disturbance activities of one or more acres or construction activities that disturb less than one acre when part of a larger common plan of development or sale that will disturb a cumulative total of one or more acres over the life of the project.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Permit applications for work on Missouri Department of Transportation right-of-way statewide.
      “Contact the Traffic Specialist a minimum of 48 hours prior to beginning work and for all necessary inspections.”
    • Published (with conditions) — Installation or repair of most onsite wastewater treatment systems in Missouri.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
  • 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”

Inside cities and towns in Adair County

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

  • Building code adoptedAdopted (with conditions)

    Construction within the City of Kirksville, Adair County, Missouri.

    • The City states that its adopted codes apply to construction practice.
    • The cited page states that the 2021 International Code version became operative on March 21, 2022.
    • The City also adopted the 2020 National Electrical Code as its standalone electrical code.

    building code edition: 2021 International Code Council codes · electrical code edition: 2020 National Electrical Code · effective date stated by source: 2022-03-21

    “The City of Kirksville has adopted the following codes to be used for construction practice:”
  • Local zoningPresent (with conditions)

    Parcels within the City of Kirksville, Adair County, Missouri.

    • Rezoning requires submission of the listed documents and an application fee.
    • Adjacent landowners within 185 feet must be notified for a rezoning hearing.
    • The City Planner publishes notice at least 15 days before the public hearing.
    • The Planning and Zoning Commission makes a recommendation to the City Council for final decision.
    • Where allowed by Municipal Code, a Special Use Permit may be allowed.

    adjacent-owner notice distance: 185 feet · public notice lead time: >= 15 days

    “The City Planner and the Applicant(s) will work together to present the rezoning request to the Planning and Zoning Commission. The Planning and Zoning Commission will decide on a recommendation to be given to the City Council at their next regularly scheduled City Council Meeting for their final decision.”
    3 more reviewed findings on this topic
    • Present (with conditions) — Property rezoning and special-use permitting within the City of Kirksville, Adair County, Missouri.
      “To rezone any parcel of land within the City of Kirksville, the applicant must submit the following documents to the City Planner:”
    • Present (with conditions) — Parcels within the City of Kirksville, Adair County, Missouri.
      “To rezone any parcel of land within the City of Kirksville, the applicant must submit the following documents to the City Planner:”
    • Present (with conditions) — Parcels within the City of Kirksville, an incorporated municipality in Adair County.
      “To rezone any parcel of land within the City of Kirksville, the applicant must submit the following documents to the City Planner:”
  • Zoning districtsPublished (with conditions)

    Zoning districts and zoning maps within the City of Kirksville, Adair County, Missouri.

    • The City identifies Chapter 44 as its zoning ordinance and provides both interactive GIS and PDF zoning maps.
    • This municipal zoning information does not establish zoning rules for unincorporated Adair County or other municipalities.
    “City of Kirksville Zoning Ordinance (Chapter 44) [...] Zoning Map (Interactive GIS) [...] Zoning Map (pdf)”
  • Short-term rentalsLimited

    The Airbnb short-term rental approved for 2701 Sunset Cove Drive in Kirksville, Missouri.

    • A special use permit is required for the approved use.
    • Temporary rental of the entire property is prohibited.
    • The current property owner must remain on the premises overnight while guests occupy rooms.
    • Meals may not be provided or sold to guests; only permitted prepackaged foods may be provided.
    • Receptions, parties, weddings, or similar activities are prohibited.
    “That a Special Use Permit is hereby issued [...] Temporary rental of the entire property shall be prohibited.”
  • Permit feesPublished (with conditions)

    One- and two-family dwelling building permits within the City of Kirksville, Adair County, Missouri.

    • The published schedule is effective March 23, 2026.
    • The fee is based on construction cost using International Code Council National Average Calculations.

    minimum building permit fee: 25 USD · building permit fee: per 4.25 USD per $1,000 of construction cost (Construction cost based on International Code Council National Average Calculations)

    “Effective 03/23/2026 [...] Building Permits: Minimum Cost $25.00 Plus $4.25 / $1,000 of construction cost based on International Code Council National Average Calculations”
  • Permit processPublished (with conditions)

    New structures, additions, decks, and pre-built structures placed within Kirksville city limits.

    • The application requires the location address, property type, work type, owner and contractor information, and total project cost.
    • New buildings or structures additionally require use, size and height, dwelling-unit count, square footage, a site plan, setbacks, drainage/topographical information, and in specified cases signed and sealed engineering or architectural plans.
    “A building permit is required whenever a party wishes to build a new structure, add to an existing structure, build a deck”

Still unanswered

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

  • Certificate of occupancy — Whether Adair County requires a certificate of occupancy before occupying a newly constructed, altered, converted, or substantially repaired building.
  • Minimum lot size — Minimum lot size for land development in unincorporated Adair County.
  • Building height — Building height in unincorporated Adair County.
  • Living in an RV — Long-term or residential occupancy of a recreational vehicle on private land in Adair County.
  • Tiny homes — Occupancy of tiny homes on private land in Adair County.
2 more unanswered
  • Manufactured homes
  • 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 Adair County, Missouri

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

Adair County scores 79/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost.

How much does land cost in Adair County, Missouri?

Land in Adair County runs about $4,098 per acre, based on the latest county data.

What is the water situation in Adair County?

Adair County gets about 40.7" of rain a year, with severe drought in roughly 7.6% of years.

How remote is Adair County?

A representative private-land location has about 26,006 people within a 30-minute drive and 576,171 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 Adair compares in Missouri

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