Building permits, zoning and septic rules in Harrison County, Iowa

Harrison County requires a building permit for new construction, reconstruction, or movement of a structure on rural, unincorporated property¹. Planning & Zoning provides applications for new construction, remodeling, and repairs; the county takes no action until the filing fee is paid in full¹. Ask the Zoning Administrator for the current building-permit fee; the published $100 fee is for a Board of Adjustment appeal¹. A written appeal must state the reasons and be filed within 30 working days after the final decision¹. Owner-builders working or arranging work on their own property are excluded from Iowa’s contractor-registration definition, but that exemption does not waive county building, zoning or septic permits³. Harrison County issues occupancy compliance certificates when required by its zoning ordinance; ask the Administrator whether your project needs one¹.

Harrison County Environmental Health, Planning & Zoning handles rural building applications at 111 N. 2nd Avenue, 2nd Floor Courthouse, Logan, IA 51546; call (712) 644-2302¹. Office hours are Monday through Friday, 7:00 a.m. to 3:30 p.m¹.. Submit a legal description or plat of survey and identify the area on a digital photo for a rural zoning determination¹. Inside Missouri Valley, the city requires its own building permits before work starts; private septic administration remains with Harrison County Environmental Health^1,2. Missouri Valley adds a surcharge of 100% of the usual permit fee when covered work starts before the necessary permits are established².

Harrison County administers zoning in rural, unincorporated areas; incorporated municipalities may have separate local rules¹. Qualifying agricultural land and structures are generally exempt from Iowa county zoning while used for agricultural purposes, although county rules can still apply in river or stream floodplains⁴. Harrison County designates certain areas Floodplain District F-1, with special regulations addressing flood danger and development that could obstruct, contain, or divert floodwater¹. Special-exception uses depend on the zoning district, so ask Planning & Zoning for the parcel’s permitted uses and applicable district standards¹. Rural subdivisions are regulated and reviewed by the Zoning Commission, but we could not confirm the detailed subdivision standards¹. For setbacks, submit a legal description or plat of survey to Planning & Zoning; we could not confirm numerical distances¹.

Harrison County Environmental Health licenses and inspects private septic-system construction¹. New private septic construction requires a site review, an inspection before any portion is covered, and a final inspection with a location diagram kept on file¹. New rural construction using private sewage disposal must receive its sewage-disposal permit before the building permit, so an off-grid plan does not bypass sanitation review¹. Buyers may request a county on-site evaluation of an existing rural septic system before purchase; that optional county service is different from the required inspections for new construction¹. Iowa also requires qualifying private systems serving 1–4 dwelling units to be inspected before ownership transfers; the tank generally must be opened and pumped unless properly pumped within the prior 3 years, and an inspection remains valid for 2 years⁷. Only 44.1% of Harrison County soils lack severe limits for a conventional drain field, so get the county site review before fixing the house location or system design^1,6.

We could not confirm whether full-time RV occupancy or temporary camping is allowed on private rural land in Harrison County. Ask Planning & Zoning about the intended duration, utilities, septic plan, and zoning district before buying or moving an RV onto a parcel. Iowa prevents a county from rejecting a residential structure solely because it is a manufactured home, but the home remains subject to the same applicable foundation, setback, and minimum-area standards as a site-built single-family dwelling on the same lot⁴. Since July 1, 2026, an Iowa county must allow at least one accessory dwelling unit on a single-family lot in a district where a single-family residence is an allowed principal use; the unit may be up to 1,000 square feet or 50% of the main residence, whichever is larger⁵. Harrison County's specific tiny-home, minimum-size, and setback rules remain unconfirmed, so obtain a parcel-specific determination from Planning & Zoning before ordering a unit.

1. Submit a legal description or plat of survey to Planning & Zoning to establish the parcel’s district, setbacks, subdivision status and any Floodplain District F-1 designation¹.
2. Arrange driveway or field-entrance approval with the County Engineer for county-road access; Iowa DOT approval must precede work on an entrance to a primary highway^8,9.
3. Obtain applicable private sewage-disposal or water-supply permits before the building permit; new wells require county on-site review and approval¹.
4. Obtain the building application from Planning & Zoning and pay the filing fee in full¹. Ask that office which building-code edition and structural inspections apply; we could not confirm either.
5. Arrange septic site review, inspection before any portion is covered, and final inspection with a location diagram retained by Environmental Health¹.
6. Ask the Zoning Administrator whether your project requires an occupancy compliance certificate¹.

Confirm the zoning district, setbacks, subdivision standards, and any Floodplain District F-1 designation before relying on a site plan¹. If the property has an existing septic system, ask Harrison County for an on-site evaluation before closing¹. Iowa separately requires a time-of-transfer inspection for qualifying private septic systems⁷. Only 44.1% of county soils lack severe limits for a conventional drain field, so verify the actual homesite⁶. Harrison County requires permits for new and reconstructed private wells, plus on-site review and approval for new well construction¹. A driveway or field entrance connecting to a county road requires approval from the County Engineer's Office⁸. The effective property-tax rate is about 1.3%, with a median annual bill of about $2,214⁶.