Overview
Preemption classification
Tier A — Pro-housing leader
HB 2001 (2019): first-in-nation ban on single-family-only zoning in cities over 25,000. 2025 expansions closed loopholes. Parking reform (2022), single-stair (2025), duplex-by-right on ADU lots. Preempts local rent control.
Governance
Statewide
Building and zoning code adoption is mandated at the state level.
Adopted building codes
2024 codes eff. April 2026
City-level IBC adoptions (2)
| City | IBC | Amendment notes |
|---|---|---|
| Portland | 2024 | |
| Salem | 2024 |
View building-code adoption for Oregon →
5 of 5 codes adopted (IBC, IRC, IECC, IFC, NEC)
Profiled counties
Cities
Showing 3 of 3
| City | Population | Code | Status | Issues |
|---|---|---|---|---|
| Eugene | — | Eugene Code Chapter 9 — Land Use · 13 districts | V2 ✓ | freshness:volatiledata:gaps-present |
| Portland | — | Title 33 — Planning and Zoning, City of Portland Municipal Code · 27 districts | V2 ✓ | freshness:volatiledata:gaps-present |
| Salem | — | Salem Revised Code (SRC), Title X — Unified Development Code (UDC) · 14 districts | Pending · medium | status:draftpriority:mediumcohort:needs-dom-retrievalfreshness:volatile |
Research status
Data quality
67%completeness2 confirmed1 partial