1858 40th Ave
San Francisco · Sunset/Parkside · San Francisco · Coordinates: 37.75216, -122.49857
Parcel & Assessor
- Lot size:
- —
- Assessor use:
- —
- Addresses on lot:
- 1858 40TH 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 3,000 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 0602980113A, effective March 23, 2021
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,428,000 – $1,932,000 · Status: Off market
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)
15 active or recent development projects (16 housing units across completed, permitted, and pipeline stages) and 736 total building permits recorded within ½ mile.
- Adds housing (ADU)13 permits (14 units)
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 1858 40th Ave (Issued)On this parcel
Active in "Issued" for 9 yr (first record Nov 3, 2017) with no new permit activity recorded in 7.2 yr.
- 15 new homes at 3601 Lawton St (Applied)0.35 mi NW
Active in "Applied" for 8.6 yr (first record Mar 6, 2018) with no new permit activity recorded in 6.2 yr. High-impact scale (15 housing units, 7 deed-restricted affordable, $7,000,000 declared valuation across 3 permits).
- Accessory dwelling unit at 1719 39th Ave (Applied)0.18 mi N
Active in "Applied" for 22 mo (first record Jan 9, 2025) with no new permit activity recorded in 11 mo. High-impact scale (1 housing unit, $900,000 declared valuation across 1 permit).
- Accessory dwelling unit at 3713 Lawton St (Issued)0.39 mi NW
Active in "Issued" for 15 mo (first record Aug 11, 2025) with no new permit activity recorded in 10 mo. High-impact scale (1 housing unit, $1,062,978 declared valuation across 1 permit).
Permit & Project History on This Parcel (1 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 201711033052 | Accessory dwelling unit (new or conversion) | issued | Iss. Aug 27, 2019 | $400,000 | two story rear addition to an existing two story sfr. (n) bath, (n) bedroom, (n) family room @ 1st floor. |