Oregon ADU By-Right in Residential Zones (OR)
Tracked preemption from the Oregon overlay bundle.
Overview
← All state preemptionsOregon overlay roll-upOregon zoning wikiOregon building codesFederal overlaysGlossaryFederal-conflict: Yes
Effective
2017-08-15
Sunset
—
Authority
state
Scope
state:OR
Other Oregon preemptions
Oregon SB 1537 — Climate-Friendly & Equitable Communities Rules (CFEC/CEP)Oregon HB 3414 — Land Use Adjustments for HousingOregon SB 8 — Affordable Housing on Religious & Nonprofit LandOregon HB 2003 / HB 2010 — Housing Production Strategy RequirementsOregon HB 2001 — Middle Housing (Duplex Tier, Cities ≥10,000)Oregon HB 2001 — Middle Housing (Fourplex Tier, Cities ≥25,000 or Portland Metro)Oregon Statewide Planning Goal 10 — HousingOregon Urban Growth Boundary Framework
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
parcel.base_zone_category ∈ {res_sf, res_mf, res_th, mu}Preempted fields
4 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
base_districts[category=res_sf].allowed_uses | add | adu | |
review_type | waive_discretionary | — | |
base_districts[category=res_sf].owner_occupancy_required_adu | waive | — | Cities cannot impose owner-occupancy requirements |
base_districts[category=res_sf].parking_ratio_adu | waive | — | Parking mandates for ADUs waived near transit |
Citation
Authority source
ORS 197.312(5); SB 1051 (2017); HB 2001 (2019)
§ ORS 197.312(5) — ADU requirements
Research notes
ADUs permitted by-right in all zones that allow detached single-family dwellings. Cities cannot impose owner-occupancy requirements. Parking requirements waived near transit. Applies statewide to cities ≥2,500 population and counties ≥15,000.