R20 Zone in Portland, OR
R20 zoning district rules in Portland, OR. Permitted uses, setbacks, height limits, and lot coverage requirements.
The R20 zone in Portland, OR is a residential district (Two-Family Residential). Permits up to two dwelling units per lot (duplex). Allows slightly higher density than R-1 while maintaining low-density neighborhood character. This zone requires a 20 ft front setback, 10 ft side setback, and 20 ft rear setback. Maximum building height is 30 feet (2 stories). Maximum lot coverage is 40%.
Common Permitted Uses
- Single-family homes
- Duplexes
Permits up to two dwelling units per lot (duplex). Allows slightly higher density than R-1 while maintaining low-density neighborhood character.
Setback Requirements
| Setback Type | Requirement |
|---|---|
| Front Setback | 20 feet |
| Side Setback | 10 feet |
| Rear Setback | 20 feet |
R20 zone: 20,000 sqft minimum lot. Portland Zoning Code 33.110.220. Large-lot residential.
Height Limits
- Max Height
- 30 feet
- Max Stories
- 2
R20 zone. Portland Zoning Code 33.110.215.
Lot Coverage
- Max Coverage
- 40%
R20 zone. Portland Zoning Code 33.110.215. All covered structures including garage included.
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