Portland, OR · zoning record
The dimensional standards that govern what you can build in the R20 district, straight from Portland's ordinance, with every figure quoting its source. Check a specific address to see how these rules apply to a real lot.
Free · Every figure cited · Read from the current code (2026-10-02)
These are the letter-of-the-law limits for the base R20 district. Overlays (historic, neighborhood plan, and similar) can tighten them; a specific address check resolves the overlays that actually apply.
Required space from the front line.
“- Front building 20 ft. 20 ft. 20 ft. 15 ft. 10 ft. 10 ft.”Table 110-4 Summary of Development Standards In Single-Dwelling Zones › Minimum Setbacks › - Front building setback › R20 column · Portland code · read 2026-10-02
Required space from a side line.
“- Side building 10 ft. 10 ft. 10 ft. 5 ft. 5 ft. 5 ft.”Table 110-4 Summary of Development Standards In Single-Dwelling Zones › Minimum Setbacks › - Side building setback › R20 column · Portland code · read 2026-10-02
Required space from the rear line.
“- Rear building 10 ft. 10 ft. 10 ft. 5 ft. 5 ft. 5 ft.”Table 110-4 Summary of Development Standards In Single-Dwelling Zones › Minimum Setbacks › - Rear building setback › R20 column · Portland code · read 2026-10-02
Every figure above is quoted verbatim from the current ordinance. We never substitute a typical-for-zone default: a field absent from the record shows nothing, not a guess.
See how these standards resolve on a specific parcel, with the overlays that actually apply, in about 20 seconds.
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