328 Mount Vernon Ave
San Francisco · Outer Mission · San Francisco · Coordinates: 37.71808, -122.44702
Parcel & Assessor
- Lot size:
- —
- Assessor use:
- —
- Addresses on lot:
- 328A MOUNT VERNON AVE; 328 MOUNT VERNON AVE
Zoning & Land Use
RTO-C — RESIDENTIAL TRANSIT ORIENTED DISTRICT - C (Commercial)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RTO-C (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs.
- SB 9: two homes on the lotUnlikely
Zoned RTO-C (multifamily residential), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RTO-C (multifamily residential), not a single-family residential zone.
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 0602980230A, 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: $1,295,000 – $1,753,000 · 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)
27 active or recent development projects (36 housing units across completed, permitted, and pipeline stages) and 562 total building permits recorded within ½ mile.
- New construction1 permit
- Adds housing (ADU)
Developments Deserving Closer Investigation & Active Area Builders
- 50 new homes (Entitled)0.36 mi SE
Active in "Entitled" for 2.7 yr (first record Feb 8, 2024) with no new permit activity recorded in 2.7 yr. High-impact scale (50 housing units, 12 deed-restricted affordable across 0 permits).
- New duplex at 6 Caine Ave (Issued)0.17 mi W
Active in "Issued" for 3.3 yr (first record Jul 14, 2023) with no new permit activity recorded in 2.1 yr. High-impact scale (2 housing units, $1,596,398 declared valuation across 1 permit).
- New commercial building at 1 Sgt John V Young St (Issued)0.46 mi N
Active in "Issued" for 3.8 yr (first record Dec 29, 2022) with no new permit activity recorded in 7 mo. High-impact scale ($15,000,000 declared valuation across 2 permits).
- Accessory dwelling unit at 358 San Miguel St (Issued)0.14 mi NW
Active in "Issued" for 6.7 yr (first record Feb 4, 2020) with no new permit activity recorded in 2.8 yr.
Permit & Project History on This Parcel (3 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 202501249034 | Accessory dwelling unit (new or conversion) | complete | Iss. Jul 8, 2025 | $388,000 | ab1114:construction of a 400-square-foot one bed adu on ground/basement level of(e)sfd w/ full bath, kitchen & dining ar… |
| 202002053653 | Roof replacement | complete | Iss. Feb 6, 2020 | $18,000 | reroofing |
| 202001081441 | Remodel / interior alteration | complete | Iss. Jan 8, 2020 | $6,000 | perform repairs as per lingruen associates, termite report #83910 & 83910 s1, item #1c, 5d |
State HCD Housing Element APR records on this parcel: 1 entry (report years 2025).