Buying Land in Ste. Genevieve County, Missouri

No Evidence of County Zoning -- But a Countywide Building Permit Ordinance Does Apply

Case-by-case / verify locally

No public source located during this research pass shows a planning or zoning department, zoning map, or zoning ordinance for unincorporated Ste. Genevieve County. What is confirmed is a separate building-permit requirement: County Ordinance adopted January 1, 1986 requires a building permit countywide, issued at no fee through the County Assessor's office. That's a real administrative requirement even in the apparent absence of zoning districts or a board of adjustment -- confirm both points directly with the County Commission ((573) 883-5589) before assuming either a zoning process or a permit-free process applies to a specific parcel. The incorporated City of Ste. Genevieve runs its own separate zoning code (Chapter 405) with Agricultural, Residential, Commercial, and Industrial districts, so a parcel inside city limits is governed very differently than one just outside them.

French Colonial Long-Lot Surveys Can Complicate Boundaries Near the Historic District

Case-by-case / verify locally

Ste. Genevieve was founded in 1735 and is the oldest permanent European settlement in Missouri. Its original farmland was divided under French colonial custom into long, narrow "common field" strips -- typically about one arpent (192.5 feet) wide and forty arpents (roughly a mile) long -- running perpendicular to the Mississippi River back toward the bluffs, a pattern completely different from the rectangular Public Land Survey System (PLSS) sections used across most of Missouri. Some of this arpent-strip pattern persisted in local land division for well over a century and can still surface as irregular, non-rectangular parcel boundaries near the historic district and the old "Grand Champ" (Big Field) bottomland. See our dedicated land-surveys page for this county for what that means in practice.

Mississippi River Flooding Is a Serious, Recurring Risk

Case-by-case / verify locally

The Mississippi River at Ste. Genevieve crested at a record 49.74 feet in August 1993, a flood severe enough that the community built a 50-foot levee between 1998 and 2001 to protect the historic downtown; the river again approached near-record levels in 2019, forcing sandbagging and levee monitoring along the county's river frontage. Land near the Mississippi or its bottomland tributaries should get an independent FEMA flood-zone check rather than relying on a levee's design standard alone -- levees reduce but don't eliminate flood risk, and low-lying land outside town can flood even when the town-protecting levee holds.

Septic Follows the Standard Statewide Health-Department Model

Generally favorable

Onsite wastewater treatment (septic) permits for unincorporated Ste. Genevieve County are handled by the Ste. Genevieve County Health Department's onsite sewage program ((573) 883-7411), under the same statewide OWTS framework used elsewhere in Missouri -- a site evaluation typically precedes a construction permit. Private wells fall under Missouri DNR well-construction rules rather than a county permit.