Buildability™
Score a property
  1. Zoning
  2. San Diego, CA
  3. RS-1-4

San Diego, CA · zoning record

RS-1-4 zoning in San Diego.

The dimensional standards that govern what you can build in the RS-1-4 district, straight from San Diego'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)

RS-1-4 dimensional standards.

These are the letter-of-the-law limits for the base RS-1-4 district. Overlays (historic, neighborhood plan, and similar) can tighten them; a specific address check resolves the overlays that actually apply.

Minimum lot size

10,000 sf

Smallest conforming lot.

“Min lot area (sf) 40,000 20,000 15,000 10,000 8,000 6,000 5,000”Table 131-04D Development Regulations for RS Zones › Min lot area (sf) › RS-1-4 column · San Diego code · read 2026-10-02

Minimum lot width

65 ft

Narrowest conforming lot.

“Lot width (ft) 100 80 75 65 60 60 50”Table 131-04D Development Regulations for RS Zones › Min lot dimensions › Lot width (ft) › RS-1-4 column · San Diego code · read 2026-10-02

Minimum lot depth

100 ft

Shallowest conforming lot.

“Lot depth (ft) 100 100 100 100 100 95 95”Table 131-04D Development Regulations for RS Zones › [See Section 131.0442(a)] › Lot depth (ft) › RS-1-4 column · San Diego code · read 2026-10-02

Front setback

20 ft

Required space from the front line.

“Min Front setback (ft) 25 25 20 20 20 15 15”Table 131-04D Development Regulations for RS Zones › Setback requirements › Min Front setback (ft) › RS-1-4 column; note [1]: For lots where at least one-half of the front 50 feet of the lot depth has a minimum slope gradient of 25 percent, the setback closest to the street frontage may be reduced to a minimum 6 feet. · San Diego code · read 2026-10-02

Interior side setback

6 ft

Required space from a side line.

“Min Side setback (ft) 10 8 7 6 5 5 4”Table 131-04D Development Regulations for RS Zones › Setback requirements › Min Side setback (ft) › RS-1-4 column; note [2]: See Section 131.0443(a)(4). · San Diego code · read 2026-10-02

Street-side setback

6 ft

Required space from a side street on a corner lot.

“Min Street side setback (ft) 10 8 7 6 6 6 5”Table 131-04D Development Regulations for RS Zones › Setback requirements › Min Street side setback (ft) › RS-1-4 column; note [2]: See Section 131.0443(a)(4). · San Diego code · read 2026-10-02

Rear setback

20 ft

Required space from the rear line.

“Min Rear setback (ft) 25 25 20 20 20 15 13”Table 131-04D Development Regulations for RS Zones › Setback requirements › Min Rear setback (ft) › RS-1-4 column; note [3]: See Section 131.0443(a)(2). · San Diego code · read 2026-10-02

Sources

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.

Informational only — not a permit, appraisal, or professional engineering opinion. Verify with your local planning department before acting on it. See Terms and data sources.

Other San Diego districts on record.

RS-1-3RS-1-5RS-1-10RS-1-13RS-1-1RS-1-12RS-1-2RS-1-11RS-1-14RS-1-7RS-1-6RS-1-9RT-1-3RS-1-8RT-1-2RT-1-5RT-1-1RT-1-4

Check a real San Diego lot against RS-1-4.

See how these standards resolve on a specific parcel, with the overlays that actually apply, in about 20 seconds.

Free to score · No card, no signup · All 50 states