Buying Land in Harrison County, Iowa

Zoning, subdivision, and floodplain: one department, one 1996 ordinance

Harrison County's zoning ordinance, adopted in February 1996, sets the rules and procedures for zoning and building throughout the unincorporated county. The Zoning Administrator serves as chief advisor to the Zoning Commission, which handles changes to zoning regulations, while the Planning & Zoning Committee holds public hearings (per Section 26 of the ordinance) on rezoning and permit requests. The same department provides property zoning information, building setbacks, and subdivision-regulation guidance for anyone planning to build or split off a parcel.

The ordinance also designates an F-1 Floodplain District covering areas shown on FEMA National Flood Insurance Program maps, and the department keeps floodplain maps for the entire county. Construction within that mapped floodplain generally requires a floodplain development permit, consistent with Iowa's statewide framework administered jointly by counties and Iowa DNR through its PERMT electronic permitting system -- DNR's own guidance is explicit that using PERMT does not substitute for any required local permit. Confirm a specific parcel's zoning district and floodplain status directly with the department before assuming a use or building plan is permitted outright.

Wells and septic: the same office, standard Iowa Time of Transfer rules

Private well and septic system permitting for unincorporated Harrison County also runs through the Environmental Health, Planning & Zoning department, rather than a separate public-health office -- Iowa State University Extension's own statewide directory of drinking-water-testing contacts lists this department, with staff contact Matt Pitt, as the point of contact for the county. As in every Iowa county, a private sewage treatment system serving a property here must be inspected before a sale closes, under the state's 2009 Time of Transfer law. We could not confirm current permit fee amounts for either well or septic permits during this research pass -- confirm directly with the department before budgeting for either.

Missouri River flood risk: real history, not a hypothetical

Harrison County sits directly on the Missouri River, and its flood history over the past fifteen years is real and well documented rather than a generic floodplain disclosure. In June 2011, as historic upstream flooding produced what's considered one of the costliest floods in the Missouri River's history, a levee breach north of Council Bluffs flooded part of Harrison County, threatened to cut U.S. Route 30 between Blair, Nebraska and Missouri Valley, and inundated the DeSoto National Wildlife Refuge along the county's western edge.

That wasn't a one-time event. In March 2019, a levee failed at Missouri Valley -- the county's largest city and county seat area -- forcing resident evacuations as part of a broader regional disaster that breached or overtopped roughly 200 miles of levees across four states. In the same event, the Boyer River, which flows southwest across the county before joining the Missouri, separately closed U.S. Route 30 near Woodbine as it crested above 25 feet, while regional flooding closed stretches of I-29 and I-680 near Crescent, Minden, Missouri Valley, and Council Bluffs. See our dedicated flood-zones page for this county for what these two events mean when evaluating a specific parcel, including how to check current flood-zone mapping through the Iowa Flood Center's Missouri River Flood Information System.

The Loess Hills: a distinct eastern landscape with real recreational value

The county's other defining geographic feature sits on the opposite side from the river: the Loess Hills, a nationally unusual wind-deposited landform running along Harrison County's eastern portion and marketed regionally as part of the Loess Hills National Scenic Byway. Loess Hills State Forest offers more than 60 miles of trails and hunting for white-tailed deer, turkey, and small game, and the Harrison County Conservation Board separately manages 19 park and wildlife areas covering over 1,800 acres, including the Willow Lake Recreation Area near Woodbine with its Nature Center and rental cabins. For a buyer weighing a Harrison County parcel, the Loess Hills side of the county carries a materially different land-use profile -- more recreational and hunting-oriented, without the flood exposure -- than the river-bottom side.

Farmland values: below the state average, reflecting the county's mixed terrain

Harrison County's 2025 average farmland value came in around $10,994 per acre, up about 2.3% from the prior year, but still below the 2025 statewide Iowa average of roughly $11,549 per acre. That gap is consistent with the county's geography: a mix of flood-exposed river bottomland and steep, less-tillable Loess Hills terrain pulls the countywide average down relative to flatter, more uniformly tillable counties elsewhere in the state. Treat any county average as a starting point only -- a parcel's actual value depends heavily on which side of the county it sits in, its soil productivity, and its flood exposure.