Missouri
Buying Land in Adair County, Missouri
Adair County, seat Kirksville, is unzoned outside its cities -- there is no countywide zoning ordinance or building code to clear for rural land. What is worth knowing here is different: the county hosts one of Missouri’s largest wind farms and its largest solar project, both real, active, and documented in detail below.
No county zoning: what that actually means for a buyer
Adair County has not adopted county-wide zoning or a general building code for its unincorporated area. This is consistent with a broader Missouri pattern: outside a relatively small number of urban and suburban counties, most rural Missouri counties never adopted the planning and zoning authority made available to them under RSMo Chapter 64, and Adair County is one of them. In practice, that means there is no county zoning map, no use table, and no county-level rezoning or conditional-use-permit process standing between you and most rural land uses -- a genuine advantage for buyers who want flexibility a zoned Midwest county wouldn’t offer.
The absence of county zoning does not mean the absence of any local rules. Incorporated cities inside the county set their own zoning independently -- Kirksville, the county seat and largest city, has its own zoning code (Chapter 44 of its municipal code) that applies within city limits and would apply to any annexed land. A parcel that looks like open countryside on a map can still be subject to a city’s zoning if it falls inside city limits or an annexed area, so always confirm a specific parcel’s status with both the County Commission/Clerk’s office and, if it’s anywhere near Kirksville or another incorporated town, that city’s own planning office.
Septic and wells: a county health department for one, state rules for the other
Onsite wastewater treatment (septic) is handled locally: the Adair County Health Department, working under Missouri Department of Health and Senior Services regulations, issues OWTS permits for construction of a new system. A permit is specifically required if a lot is smaller than three acres, or is adjacent to a public utility lake or U.S. Army Corps of Engineers property -- otherwise the requirement can vary, so confirm directly for a specific parcel. Any new or replacement system needs a soil morphology report from a Registered Onsite Soil Evaluator to determine an appropriate system type and location, and anyone installing or repairing a system (regardless of whether a permit is required) must be registered with the state DHSS.
Wells work differently. Missouri regulates well construction at the state level under RSMo 256.600 to 256.640, not through a county permit desk. A landowner may legally install their own well or pump without a permit; anyone else doing that work -- a contractor -- must hold a Missouri DNR well and pump installation contractor permit (restricted, non-restricted, or apprentice, depending on experience). There is no separate Adair County well-permitting office to call; DNR’s statewide rules are what govern well construction quality and contractor licensing here, the same as in every other Missouri county.
Wind and solar: two of Missouri’s largest renewable projects, with a real caveat
Adair County (together with neighboring Schuyler County) hosts the High Prairie Renewable Energy Center, a 400 MW wind farm with 175 turbines owned by Ameren Missouri, built on more than 70,000 acres under wind-lease option across more than 200 landowners. Separately, the Morris Solar Project -- a 250 MW, roughly 1,100-acre AES facility that went into service in 2025 near the Kirksville Regional Airport -- is reported as Missouri’s largest solar farm. Both projects are real, documented, and represent genuine income opportunities for landowners inside their footprints.
High Prairie has also had a real reliability problem worth knowing about: three separate turbine collapses were documented in 2024 (April 29, August 25, and November 1), tied to wind-turbine blade failures, and left the large majority of the site’s 175 turbines idle well into 2025 while Ameren worked through inspections and blade replacements. This doesn’t change the underlying land-lease economics for a landowner already under contract, but it’s a documented, verifiable fact worth knowing if you’re evaluating land specifically because of its proximity to this project, or considering a similar lease elsewhere in the corridor. See our dedicated wind-solar-leasing page for this county for lease-specific detail.
Agriculture, rivers, and recreation: the rest of the picture
Adair County remains a working agricultural county: roughly 400 family-owned farms averaging about 294 acres, with cropland covering roughly 53% of land use (soybeans and corn are the leading row crops) and pastureland another 29%, plus a meaningful cattle herd. The Chariton River and its tributaries drain the western part of the county, and the river has a documented history of both flooding and channelization -- work to straighten the Chariton north of the Burlington Railroad line began in 1912-1923 -- so check FEMA flood status for any parcel near the Chariton or its creeks before assuming it is dry ground.
For recreational buyers, the county has real public hunting and outdoor-recreation land close to Kirksville: Big Creek Conservation Area (about 1,064 acres, roughly 75% forest/woodland/savanna) sits just southwest of the city and borders Thousand Hills State Park, with deer and squirrel hunting rated good and turkey and rabbit rated fair by the Missouri Department of Conservation. This is public land, not a substitute for evaluating a specific private parcel’s hunting potential, but it’s a genuine local amenity worth knowing about if recreational access is part of your buying decision.
Who to Call Before Buying Land in Adair County
Adair County has no planning/zoning department because it has not adopted countywide zoning -- route general land-use and ordinance questions to the County Commission/Clerk’s office instead. We could not independently verify a dedicated floodplain-administrator contact or confirm whether the county participates in the National Flood Insurance Program separately from state SEMA coordination; confirm directly with the County Commission for any parcel near the Chariton River.
Other
Adair County Commission / County Clerk
General county government questions, ordinances, road petitions, and confirming whether any special ordinance (there is no general zoning) applies to a specific unincorporated parcel.
Environmental Health
Adair County Health Department
Onsite wastewater (septic) system permits and inspections, private water supply testing, and general environmental health questions.
Septic / Onsite Wastewater
Adair County Health Department (Onsite Sewage)
OWTS construction permits, required for lots under three acres or adjacent to a public utility lake or Corps of Engineers property.
Wells / Private Water
Missouri Department of Natural Resources -- Well and Pump Installation Contractor Permitting
Statewide well-construction rules and contractor permitting; landowners may self-install a well without a permit.
Agricultural Extension
MU Extension in Adair County
Agricultural, farm-management, and land-use questions for Adair County landowners.
Assessor / Property Tax
Adair County Assessor
Assessed value and property tax questions for a specific parcel.
Recorder / Clerk / Land Records
Adair County Recorder of Deeds
Recorded deed, easement, and plat history for a specific parcel.
GIS / Parcel Records
Adair County GIS
Online parcel and tax maps for a specific address or parcel.
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Get local guidanceTopics Specific to Adair County
Sources
- Adair County Missouri Government — Adair County, Missouri Government (accessed 2026-09)
- Ordinances & Petitions — Adair County, Missouri Government (accessed 2026-09)
- Onsite Sewage | Adair County Health Department — Adair County Health Department (accessed 2026-09)
- Onsite Wastewater Treatment — Missouri Department of Health and Senior Services (accessed 2026-09)
- Well and Pump Installation Contractor Permitting — Missouri Department of Natural Resources (accessed 2026-09)
- Adair County, Missouri — Wikipedia (cross-checked against Census Bureau data) (accessed 2026-09)
- Adair County Missouri (2017 Census of Agriculture County Profile) — USDA National Agricultural Statistics Service (accessed 2026-09)
- Missouri’s largest wind farm isn’t running at night for fear of killing endangered animals — Missouri Independent (accessed 2026-09)
- Ameren’s High Prairie wind farm turbines idle after collapses — KTVO (accessed 2026-09)
- Morris Solar Project Nearing Completion — Adair County, Missouri Government (accessed 2026-09)
- Missouri’s Largest Solar Project Set To Shine Bright And Boost Adair County’s Economy — Emporia News (accessed 2026-09)
- Big Creek Conservation Area — Missouri Department of Conservation (accessed 2026-09)
- Chariton River Watershed Inventory and Assessment — Missouri Department of Conservation (accessed 2026-09)
- Location, Adair County — University of Missouri Extension (accessed 2026-09)
- MO - Adair County Assessor — Adair County, Missouri Government (accessed 2026-09)
Last reviewed 2026-09