Buying Land in Buchanan County, Missouri

Zoning, subdivision, and building permits: administered directly by the county

Buchanan County's Zoning Order is made under RSMo 64.510-64.690 and in accordance with the county's own Master Plan, administered by the Planning & Zoning department at 411 Jules Street, Room 201, St. Joseph, MO 64501, (816) 271-1528. The current zoning order was amended and reprinted in 2024, and it requires a building permit for any structure -- and separately for any on-site wastewater treatment system -- in every zoning district regardless of acreage, a rule that's been in place since a 2012 amendment under RSMo 64.271. That pairing means a septic system in unincorporated Buchanan County effectively runs through the same permitting office as general building permits, rather than through a separate health-department process -- confirm directly with Planning & Zoning which specific approvals apply to your project before you assume only one permit is needed.

For dividing land, Buchanan County offers a Lot Split plat -- an expedited review tool for minor divisions of previously platted land by metes-and-bounds description in the county's rural areas, provided the resulting division still meets the Zoning Order and Subdivision Regulations in every other respect. It's meant to be faster than a full subdivision plat, but it's still a real application reviewed by the county, not a self-executing deed split -- a parcel described as recently divided should have a completed, approved Lot Split plat behind it, not just a surveyor's description.

Wind is banned, solar isn't: a genuinely consequential split for anyone considering a lease

Buchanan County spent 13 months studying wind energy, including hiring a consultant to draft proposed regulations, before its Planning and Zoning Commission voted 8-4 in February 2020 to recommend a complete ban on commercial wind energy development. The County Commission adopted that recommendation in March 2020, and public-hearing testimony was reportedly unanimous in opposition -- no one spoke in favor of wind development in the county. If commercial wind income is part of why you're considering a specific parcel here, that path is currently closed countywide, and reversing a county-level ban would require the county to revisit its own zoning order.

Solar has followed a different track: rather than banning utility-scale solar, Buchanan County has been actively developing its own regulatory framework, amending its solar provisions in 2022 and finalizing a more detailed Section 729 Utility-Scale Solar Energy Systems ordinance in July 2024 (after a April 2024 draft and outside consulting work). That means solar leasing remains a live option here, subject to the county's specific ordinance requirements -- see our dedicated wind-solar-leasing page for this county for what's confirmable about that process and what still needs to be checked directly with Planning & Zoning.

The Missouri River, a 2019 record flood, and an active levee system

Buchanan County's floodplain administrator is listed as Bill Brinton (411 Jules St, Room 102, St. Joseph, MO 64501, (816) 271-1574) -- a separate contact from the City of St. Joseph's own floodplain administrator, since the city and county maintain distinct programs. The county's exposure here isn't abstract: the Missouri River reached a modern record crest of 32.11 feet at St. Joseph on March 22, 2019, surpassing the previous record of 32.07 feet set in July 1993, and the city and county issued a mandatory evacuation of areas behind the L-455 levee (Missouri side) and the R-471/460 levee (Kansas side), displacing roughly 1,500 residents and 6,000 employees. See our dedicated flood-zones page for this county for the fuller picture, including what a levee-protected designation does and doesn't guarantee.

Population, agriculture, and wells: the supporting context

Buchanan County's population has been essentially flat to modestly declining in recent years -- roughly 83,500 in 2025, down slightly from 84,793 at the 2020 census, with St. Joseph itself (the county's dominant city) following a similar pattern. That's a different growth story than a fast-expanding metro-adjacent county, and it's worth factoring in if you're evaluating land partly on future appreciation. Agriculturally, the county supports cattle, horses, sheep, goats, and pigs across its A-1 and A-2 districts. As in the rest of Missouri, private wells are permitted at the state level by the Missouri Department of Natural Resources rather than by the county -- see our national well-water guide for how that process works.