Missouri
Buying Land in Lewis County, Missouri
Lewis County, seat Monticello, sits in the far northeast corner of Missouri along the Mississippi River, with Canton and La Grange as its river towns. Unincorporated areas of the county have no zoning at all, and the land itself is overwhelmingly row-crop farm ground -- but a stretch of that farmland and those river towns sits behind levees with a real, repeated flood history worth understanding before you buy.
No zoning in unincorporated Lewis County -- what routes where
Like most rural Missouri counties, Lewis County has not exercised the optional county-planning-and-zoning authority available under RSMo Chapter 64. That means unincorporated land in the county is not assigned to a zoning district, there is generally no building permit requirement for a typical residential project outside a city, and there is no zoning board of adjustment to petition if you want a variance or need to contest a neighbor's new use. Land-use, road, and general governance questions for unincorporated parcels go to the three-member County Commission, which meets at the historic 1875 courthouse in Monticello -- one of the few Missouri courthouses still standing from that decade.
The county's ten towns -- Canton, La Grange, Monticello, La Belle, Lewistown, Ewing, Williamstown, Durham, Maywood, and Steffenville -- are where zoning actually exists in Lewis County. Canton, the largest of these and home to Culver-Stockton College, and La Grange, both sitting directly on the Mississippi River, are the two places where a parcel's municipal zoning and floodplain rules matter most; if you're evaluating a lot inside or near either city's limits, start with that city's own planning office rather than the county.
Septic and wells: standard rural-Missouri process
Septic permitting for unincorporated Lewis County runs through the Lewis County Health Department (101 State Highway A, Monticello; 573-767-5312), which administers the onsite wastewater treatment system (OWTS) construction-permit process under the state's Chapter 701 RSMo framework and Missouri Department of Health and Senior Services rules -- the standard arrangement for a rural Missouri county that has not adopted its own separate wastewater ordinance. A soil evaluation typically precedes the construction permit, so build that step into your due-diligence timeline before you count on a specific building site.
Private wells in Missouri are a state Department of Natural Resources function -- well-construction rules and certified-contractor requirements apply statewide, including in Lewis County, rather than through a separate county well-permitting office. Given the county's Mississippi River bottomland geography, groundwater conditions can vary meaningfully between upland and bottomland sites, so ask a certified driller specifically about depth-to-water and any known issues for the area around a given parcel.
Row-crop farmland and the Mississippi River's presence at the edges
Lewis County's agricultural base is overwhelmingly row-crop rather than livestock: the 2022 Census of Agriculture recorded roughly 73,600 acres of soybeans and 67,500 acres of corn for grain in the county, dwarfing the roughly 15,800 head of cattle and calves on hand -- a very different profile from the cattle-and-poultry counties of southwest Missouri covered elsewhere on this site. That makes most of the county's interior a straightforward row-crop land market, with soil quality, drainage, and tenant-farming arrangements as the dominant diligence questions rather than zoning or CAFO exposure.
The exception is the county's eastern edge along the Mississippi River, where Canton and La Grange sit behind levee protection and the North and South Fabius Rivers drain into the Mississippi through territory managed in part by the Fabius River Drainage District. This stretch has a real flood history -- 1993 and 1995 were the defining events regionally, with additional high-water periods including 2008 -- and any parcel in the river-bottom portion of the county, or one relying on a levee for protection, deserves its own FEMA flood-zone determination rather than an assumption based on a neighboring parcel's status. Wakonda State Park, a 1,054-acre former quarry-turned-lake recreation area near La Grange, sits in this same river-adjacent part of the county and is worth knowing about if outdoor recreation access is part of what you're evaluating a nearby parcel for.
Who to Call Before Buying Land in Lewis County
Lewis County has no zoning or planning department, so the County Commission is the practical first contact for most unincorporated land-use questions, with the Health Department handling septic and DNR handling wells at the state level. We could not confirm a direct GIS/parcel-viewer office contact or department-level emails for most of these offices from public sources -- use the phone numbers and websites above, or the county's general directory at lewiscountymo.gov.
Other
Lewis County Commission
General county governance and the first call for land-use questions in unincorporated Lewis County given the absence of a zoning department.
Other
Lewis County Clerk
Getting placed on the County Commission's Monday-morning meeting agenda.
Environmental Health
Lewis County Health Department
Onsite wastewater treatment system (septic) permits and general environmental health questions.
Septic / Onsite Wastewater
Lewis County Health Department
OWTS construction permits, required soil evaluations, and septic system compliance.
Wells / Private Water
Missouri Department of Natural Resources -- Water Protection Program
Private well construction rules and certified well-contractor requirements statewide, including Lewis County.
Floodplain / Stormwater
Lewis County Floodplain Administrator
FEMA flood-zone questions and floodplain development permits for unincorporated Lewis County, including river-bottom parcels near Canton and La Grange.
Assessor / Property Tax
Lewis County Assessor
Assessed value and property tax questions for a specific parcel.
Recorder / Clerk / Land Records
Lewis County Recorder of Deeds
Recorded deed, easement, and plat history for a specific parcel.
Agricultural Extension
MU Extension in Lewis County
Row-crop, soil, and general agricultural land-management guidance.
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Get local guidanceSources
- About Lewis County — Lewis County, Missouri Government (accessed 2026-09)
- County Commission — Lewis County, Missouri Government (accessed 2026-09)
- Lewis County Health Department — Missouri Department of Health and Senior Services (accessed 2026-09)
- On-site Septic Systems and Subdivisions — Missouri Department of Natural Resources (accessed 2026-09)
- Lewis County — Missouri State Emergency Management Agency (accessed 2026-09)
- MU Extension in Lewis County — University of Missouri Extension (accessed 2026-09)
- Lewis County, Missouri — Wikipedia (accessed 2026-09)
- Lewis County Courthouse (Missouri) — Wikipedia (accessed 2026-09)
- Wakonda State Park — Wikipedia (accessed 2026-09)
- Lewis County, Missouri (2022 Census of Agriculture County Profile) — USDA National Agricultural Statistics Service (accessed 2026-09)
- Fabius River Watershed Inventory and Assessment — Missouri Department of Conservation (accessed 2026-09)
Last reviewed 2026-09