Zoning › State preemptions › Iowa

Iowa Code §352.6 — Agricultural Area Designation + Right-to-Farm Nuisance Protection (IA)

Tracked preemption from the Iowa overlay bundle.

Overview

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Effective
1982-07-01
Sunset
—
Authority
state
Scope
state:IA
Other Iowa preemptions
Iowa SF 592 (2025) — Statewide Accessory Dwelling Unit By-Right MandateIowa Code §414.1(2) — Short-Term Rental Preemption (Residential Use Classification)Iowa Code §459.310 — Master Matrix CAFO Siting ScorecardIowa Code Ch. 161D — Loess Hills Development and Conservation Authority + AllianceIowa Code §414.28 / §335.30 — Manufactured Home Zoning Parity MandateIowa Code Ch. 303 — State Historical Society / SHPO Review + Local Historic Preservation CommissionsIowa Code Ch. 455B + 567 IAC 71 — Floodplain Development Approval (DNR Flood Plain Program)Iowa Code Ch. 461A + 571 IAC 13 — Sovereign Lands Construction Permits

Trigger predicate

When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.

AND
  • parcel.agricultural_area_acres ≥ 300
  • parcel.designated_agricultural_area == True

Preempted fields

2 fields on the base district schema are rewritten when the trigger fires.

FieldOpValueNote
nuisance_law.right_to_farmextendno_nuisance_finding_regardless_of_establishment_dateA farm or farm operation located in a designated agricultural area shall not be found to be a nuisance regardless of the established date of operation or expansion of agricultural activities — subject to exceptions for negligent operation or operation in violation of federal/state statute or regulation.
redevelopment.agricultural_area_creation_procedurerequireowner_proposal_to_county_board_minimum_300_acresAn owner of farmland may submit a proposal to the County Board of Supervisors for creation of an agricultural area; minimum 300 acres of farmland at creation. County Land Preservation and Use Commissions administer Ch. 352 designations.

Citation

Authority source
Iowa Code ch. 352 (County Land Preservation and Use Commissions); §352.2 (definitions); §352.6 (Creation or expansion of agricultural areas); §352.7 (designation); §352.11 (nuisance immunity).
§ Iowa Code §§352.2, 352.6, 352.7, 352.11
https://www.legis.iowa.gov/docs/code/352.6.pdf

Research notes

Right-to-farm overlay layered atop the §335.2 county-zoning ag exemption. Designated agricultural areas carry stronger nuisance-immunity protection than the bare farm exemption; the §352.11 immunity is the doctrinal anchor in Iowa right-to-farm disputes. Negligence and statutory-violation exceptions preserve common-law and regulatory liability tracks. Not a zoning preemption in the strict sense — it constrains the available remedy (nuisance) rather than the upstream zoning power.