4101 San Bruno Ave
San Francisco · Visitacion Valley · San Francisco · Coordinates: 37.71291, -122.40192
Parcel & Assessor
- Lot size:
- —
- Assessor use:
- —
- Addresses on lot:
- 4101 SAN BRUNO AVE
Zoning & Land Use
RH-1 — RESIDENTIAL- HOUSE, ONE FAMILY (Residential)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RH-1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RH-1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RH-1, a single-family residential zone. The lot is 2,929 sq ft on the parcel map, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Not in a State-mapped fire hazard severity zone
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 0602980234A, effective March 23, 2021
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
HUD Metro FMR (San Francisco, CA HUD Metro FMR Area) · FY 2026
Studio $2,485 · 1BR $2,977 · 2BR $3,604 · 3BR $4,604 · 4BR $4,772
Nearby Activity (½ mile radius, since October 2024)
14 active or recent development projects (17 housing units across completed, permitted, and pipeline stages) and 357 total building permits recorded within ½ mile.
- Adds housing (ADU)11 permits (13 units)
- Demolition1 permit
- Additions & renovations85 permits
- Building systems209 permits
Developments Deserving Closer Investigation & Active Area Builders
- 146 new homes at 2201 Bay Shore Bl (Applied)420 ft S
Active in "Applied" for 6.9 yr (first record Dec 18, 2019) with no new permit activity recorded in 6.9 yr. High-impact scale (146 housing units, $45,500,000 declared valuation across 2 permits).
- 152 new homes at 2401 Bay Shore Bl (Applied)0.16 mi SW
Active in "Applied" for 6.9 yr (first record Dec 18, 2019) with no new permit activity recorded in 6.9 yr. High-impact scale (152 housing units, $62,500,000 declared valuation across 1 permit).
- 133 new homes at 5 Thomas Mellon Dr (Issued)0.5 mi SE
Active in "Issued" for 10.1 yr (first record Sep 20, 2016) with no new permit activity recorded in 6.7 yr. High-impact scale (133 housing units, $42,000,000 declared valuation across 6 permits).
- Accessory dwelling unit at 46 Racine Ln (Issued)130 ft SE
Active in "Issued" for 7.1 yr (first record Sep 23, 2019) with no new permit activity recorded in 3.4 yr. High-impact scale (1 housing unit, $900,000 declared valuation across 2 permits).
Permit & Project History on This Parcel (3 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 202512242613 | Accessory dwelling unit (new or conversion) | filed | App. Apr 20, 2026 | $75,000 | convert existing garage space and storage room into new adu less than 700 sq ft |
| 202506309732 | HVAC / heat pump | complete | Iss. Jun 30, 2025 | $7,000 | furnacce replacement same kind, same location . open sheetrock to replace or repair ducting. repair drywall (small patch… |
| 201808207737 | Roof replacement | complete | Iss. Aug 20, 2018 | $9,650 | reroofing. |