Buying Land in Mills County, Iowa

Zoning, building, and subdivision: one department in Glenwood

Unincorporated Mills County is governed by Chapter 27 (Zoning Ordinances, revised 2024) and Chapter 25 (Subdivision Regulations), both administered by the county's Building & Zoning Department. A Planning and Zoning Commission reviews rezonings, conditional uses, and subdivision plats before they reach the Board of Supervisors, and the subdivision process runs through sketch plat, preliminary plat, final construction plans, and final plat stages. Chapter 25's stated jurisdiction covers the entire unincorporated area of the county unless the county has entered a 28E agreement with a specific municipality over plat review -- confirm with the department whether a parcel near an incorporated city (Glenwood, Malvern, Emerson, Silver City, or Pacific Junction) falls under any such agreement before assuming county-only review applies.

Manufactured and modular homes on unincorporated Mills County land are governed by the same state framework that applies countywide in Iowa (Iowa Code section 335.30): a manufactured home must meet the same setback, permanent-foundation, and minimum-square-footage standards that would apply to a site-built home on the same lot, and the county cannot impose width, roof-pitch, or design standards stricter than what federal manufactured-housing law allows. Mills County's own manufactured/modular homes guidance document walks through the distinction between a HUD-code manufactured home and a modular home built to the Iowa State Building Code -- pull that document from the Building & Zoning Department before siting either type of home.

Missouri River flood risk: a documented, recent, and severe history

Mills County's Missouri River flood exposure is not a hypothetical based on an old map -- it is a recent, well-documented event with real numbers attached. In March 2019, the county's levee system failed and overtopped, flooding the town of Pacific Junction in its entirety; the town's population fell from roughly 470 residents to under 100, with about 75% of residents leaving for good. Floodplain development in unincorporated Mills County is governed by Chapter 26 (Flood Plain Management Ordinance), administered by the Building & Zoning Department, and requires substantially improved buildings to be elevated at least 1.0 foot above the 100-year base flood elevation.

We cover the buyout programs, levee history, and floodplain permit process in detail on our dedicated flood-zones page for Mills County -- read it before evaluating any parcel near the Missouri River, its levee-protected bottomland, or the Loess Hills bluff line to the east.

Wells and septic: a shared Fremont/Mills Environmental Health office

Mills County's private well and septic permitting runs through an Environmental Health office shared administratively with neighboring Fremont County -- the office's own septic permit instructions are titled jointly for both counties, and both follow Iowa Code 567.69 for septic installation. A septic permit costs $500 for a full system or a lateral replacement/addition, or $150 for a tank-only permit; each fee covers a pre-site inspection and a final inspection with a certification report. Every application requires a percolation test or soil analysis, a site plan drawing, and a 911 address obtained before submission, and permits are valid for one year. For wells, Mills County participates in an Iowa DNR-funded Grants to Counties Program offering reimbursement up to $700 for well closures, $400 for cistern closures, $400 for shock chlorination, $600 for a well assessment, and $2,000 for a well rehab. Reach this office at (712) 527-9699, option 4, or by email at mscott@millscountyiowa.gov.

Land values, the Loess Hills, and recreation

Mills County straddles Missouri River bottomland to the west and the Loess Hills -- a distinctive, steeply eroded ridge of wind-deposited soil that runs along Iowa's western edge -- to the east, with the Loess Hills National Scenic Byway passing through the county. The Mills County Conservation Board manages roughly a dozen parks, lakes, and wildlife areas totaling about 1,800 acres, several of which (including a 338-acre park area and the 39-acre Mile Hill Lake park) are open to public hunting for deer, pheasant, turkey, woodcock, and waterfowl. Farmland values reflect the county's mixed river-bottom and hill-country terrain: the highest recorded Mills County farmland sale in 2024 was $13,500 per acre, though buyers should expect meaningfully lower per-acre pricing for hillier, non-tillable Loess Hills ground versus flat river-bottom cropland. Confirm current farmland values and any given parcel's floodplain status directly with the Assessor and Building & Zoning Department rather than relying on a single countywide average.