Portland Setbacks & Height Limits — Residential Zones
Fact-checked against Portland Title 33 Chapter 33.110 current through the July 1, 2026 zoning-code update on September 21, 2026.
Portland's low-density residential zones are regulated by Chapter 33.110 — Single-Dwelling Residential Zones. The dimensional standards are not identical across R7, R5, and R2.5, so the previous page's single 10/5/5-ft setback pattern and 30-ft height description was too broad.
Current Base Standards
Current Table 110-4 provides:
| Standard | R7 | R5 | R2.5 |
|---|---|---|---|
| Maximum height | 30 ft* | 30 ft* | 35 ft |
| Front building setback | 15 ft | 10 ft | 10 ft |
| Side building setback | 5 ft | 5 ft | 5 ft |
| Rear building setback | 5 ft | 5 ft | 5 ft |
| Garage entrance setback | 18 ft | 18 ft | 18 ft |
| Minimum outdoor area | 250 sq ft | 250 sq ft | 200 sq ft |
- Additional height can be available under the specific provisions referenced by Table 110-4.
The previous page incorrectly treated R7 as having a 10-ft front setback and described all three zones as having the same 30-ft maximum height. Current Title 33 instead gives R7 a 15-ft front setback and R2.5 a 35-ft maximum height.
FAR Depends on Unit Count
Portland's Residential Infill Project did not simply create one “R5 FAR of about 0.5.” Table 110-4 varies maximum FAR by zone and by the number of dwelling units.
For example, current base FAR in R5 is:
- 0.5:1 for one dwelling unit;
- 0.6:1 for two units;
- 0.7:1 for three units;
- 0.8:1 for four or more units.
Bonus FAR provisions can allow more where the project qualifies.
R2.5 uses higher FAR values, while R7 uses lower values than R5. Always use the current table for the proposed unit count.
Building Coverage Is Lot-Size Based
Current Table 110-5 does not assign one fixed coverage percentage to every R5 lot. Maximum building coverage is based on lot area:
| Lot Size | Maximum Building Coverage |
|---|---|
| Under 3,000 sq ft | 50% |
| 3,000 to under 5,000 sq ft | 1,500 sq ft + 37.5% of area over 3,000 sq ft |
| 5,000 to under 20,000 sq ft | 2,250 sq ft + 15% of area over 5,000 sq ft |
| 20,000 sq ft or more | 4,500 sq ft + 7.5% of area over 20,000 sq ft |
The previous page's “R5 typically allows around 50%” statement was therefore too generic.
Middle Housing and ADUs
Portland's current single-dwelling zones can accommodate multiple housing types and unit counts under Chapter 33.110. The exact FAR, outdoor-area, parking, and development standards depend on the proposal.
Do not treat a duplex, triplex, fourplex, or ADU project as if it has the same floor-area calculation as a single detached house.
For ADU-specific requirements, see the Portland ADU rules page and current City guidance.
Overlays and Special Conditions
Environmental, design, historic, scenic, river, and other overlays can add standards. Corner lots, garages, accessory structures, and existing nonconforming development also require separate review.
How to Check a Property
- Identify the base zone and overlays in PortlandMaps.
- Use current Table 110-4 for height, setbacks, FAR, and outdoor-area standards.
- Use Table 110-5 for building coverage.
- Check the proposed number and type of dwelling units.
- Check garage, accessory-structure, overlay, environmental, and historic rules.
- Confirm unusual conditions with Portland Permitting & Development before relying on a design dimension.
Official Sources
- Portland — Base Zones and current development-standard tables
- Portland Title 33 — Chapter 33.110 Single-Dwelling Residential Zones
- Portland Zoning Code
This guide is informational only. The current Portland Zoning Code, overlays, and parcel-specific approvals control.
More about Portland Zoning
Sources
- Portland Zoning Code (Title 33 — Planning and Zoning)·portland.gov·Accessed 2026-04-14·Direct link
- Portland Bureau of Development Services (BDS)·portland.gov·Accessed 2026-04-14·Direct link
- Portland Bureau of Planning and Sustainability·portland.gov·Accessed 2026-04-14·Direct link