Overview
Preemption classification
Tier D — Restricts locals
2025 partial ADU reform (mostly permissive). Bans rent control. Slight pro-housing tilt emerging but still primarily restrictive.
Governance
Statewide
Building and zoning code adoption is mandated at the state level.
Adopted building codes
Statewide
City-level IBC adoptions (3)
| City | IBC | Amendment notes |
|---|---|---|
| Cedar Rapids | 2024 | |
| Des Moines | 2024 | |
| Sioux City | 2024 |
View building-code adoption for Iowa →
5 of 5 codes adopted (IBC, IRC, IECC, IFC, NEC)
Profiled counties
Cities
Showing 3 of 3
| City | Population | Code | Status | Issues |
|---|---|---|---|---|
| Cedar Rapids | — | Chapter 32, Code of Ordinances · 9 districts | V2 ✓ | data:overlay-parameters-partialdata:chapter-39A-not-extracteddata:chapter-32B-not-extracteddata:urban-form-districts-not-extracted |
| Des Moines | — | City of Des Moines Municipal Code — Chapter 134 (Zoning) and Chapter 135 (Planning and Design); enacted as Ordinance No. 15,816 effective 2019-12-15 (the PlanDSM form-based code rewrite) · 31 districts | V2 ✓ | platform:municode-spa-blockerschema:form-based-hybrid-cross-chapter-referencesfbc:dimensional-standards-live-in-chapter-135 |
| Sioux City | — | Title 25 Zoning and Sign Code (Revised 2020s) · 9 districts | V2 ✓ |
Research status
Data quality
100%completeness3 confirmed