RX Zone in Portland, OR
RX zoning district rules in Portland, OR. Permitted uses, setbacks, height limits, and lot coverage requirements.
The RX zone in Portland, OR is a residential district (Single-Family Residential). Permits one dwelling unit per lot. Typically the most restrictive residential zone. Designed to preserve the character of established single-family neighborhoods.
Common Permitted Uses
- Single-family homes
Permits one dwelling unit per lot. Typically the most restrictive residential zone. Designed to preserve the character of established single-family neighborhoods.
Parking Requirements
Single-family: 1 off-street parking space per dwelling unit in R20, R10, R7 zones. No minimum parking required in R5 or R2.5 zones or within 500 ft of a frequent service transit line per Portland Zoning Code 33.266. Multi-family: No minimum parking required in RM zones per Portland's 2019 parking reforms. Multifamily projects may provide parking voluntarily. Portland eliminated parking minimums in all RM zones and most commercial zones.
Source: Portland City Code Title 33, Section 33.205 — Accessory Dwelling Units; Oregon Revised Statutes 197A.420 (HB 2001 codification). Last verified April 5, 2026. View source