Iowa Code Ch. 303 — State Historical Society / SHPO Review + Local Historic Preservation Commissions (IA)
Tracked preemption from the Iowa overlay bundle.
Overview
← All state preemptionsIowa overlay roll-upIowa zoning wikiIowa building codesFederal overlaysGlossaryFederal-conflict: Yes
Effective
1986-07-01
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 §352.6 — Agricultural Area Designation + Right-to-Farm Nuisance ProtectionIowa 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.
OR
parcel.on_national_register==Trueparcel.on_iowa_state_register_of_historic_places==Trueparcel.in_local_historic_district==Trueproject.is_state_funded_or_licensed==True
Preempted fields
2 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
review_type | require | SHPO_consultation_or_local_HPC_certificate | State Historical Society of Iowa (SHPO) reviews state-funded/licensed undertakings affecting historic resources. Locally-designated historic districts/landmarks require a Certificate of Appropriateness from the local Historic Preservation Commission before exterior alteration, demolition, or new construction. |
redevelopment.historic_property_rehabilitation_tax_credit | permit | section_404A_state_tax_credit | State Historic Preservation and Cultural and Entertainment District Tax Credit (administered through SHPO certification under 223 IAC ch. 47) provides 25% state tax credit for qualified rehabilitation of certified historic properties; layered atop the federal 20% rehabilitation tax credit. |
Citation
Authority source
Iowa Code ch. 303 (Department of Cultural Affairs / State Historical Society); §303.34 (significance review); 223 IAC ch. 47 (Historic Property Rehabilitation Tax Exemption); Iowa Code §404A (state historic tax credit).
§ Iowa Code ch. 303; §303.34; 223 IAC chs. 35–47
Research notes
Federal conflict check enabled because SHPO runs Section 106 consultations under the National Historic Preservation Act (54 U.S.C. §306108) for federally-funded/licensed undertakings. Marquee Iowa applications: Iowa City Downtown Historic District (Pedestrian Mall area; Iowa City operates 8 National Register districts + local conservation districts under its Historic Preservation Commission), Des Moines historic districts (Sherman Hill, Court Avenue, Owl's Head, etc.; administered by the Des Moines Landmark Review Board), Cedar Rapids historic districts (Czech Village/NewBo, etc.; administered by the Cedar Rapids Historic Preservation Commission). These are LOCAL designations under home-rule + Ch. 303 procedural floor — the state overlay is the SHPO certification + tax-credit interface, not a substantive state historic-zoning preemption.