Parcel Context · Public-Records Property BriefBlock/lot 1331/005
135 27th Ave
San Francisco · Seacliff · San Francisco · Coordinates: 37.78678, -122.48769
Parcel & Assessor
- Lot size:
- —
- Assessor use:
- —
- Addresses on lot:
- 135 27TH AVE; 135A 27TH AVE
Zoning & Land Use
RH-1(D) — RESIDENTIAL- HOUSE, ONE FAMILY- DETACHED (Residential)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RH-1(D) (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RH-1(D), a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RH-1(D), a single-family residential zone. The lot is 4,837 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 0602980111A, 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
ACS 2020–2024 Median Gross Rent (Seacliff):$3,309±$734 Source: ACS 2020–2024 5-year estimates. Geography: Seacliff.
ACS 2020–2024 Median Home Value (Seacliff):$2,000,000+ Source: ACS 2020–2024 5-year estimates. Geography: Seacliff.
Nearby Activity (½ mile radius, since October 2024)
19 active or recent development projects (34 housing units across completed, permitted, and pipeline stages) and 708 total building permits recorded within ½ mile.
- New construction2 permits (10 units)
- Adds housing (ADU)16 permits (22 units)
- Demolition1 permit
- Additions & renovations240 permits
- Building systems316 permits
- Repairs26 permits
- Other107 permits
Permit & Project History on This Parcel (5 permits, 1 grouped projects)
Accessory dwelling unit at 135a 27th AveStage: Applied · 1 units · $260,000 declared valuation · Last record Jul 14, 2026
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 202610149464 | Remodel / interior alteration | filed | App. Oct 14, 2026 | — | interior renovation including demo and removal of an interior wall separating existing kitchen and dining room. new door… |
| 202608046063 | Electrical / panel | issued | Iss. Aug 4, 2026 | — | interior, non structural remodel, demolish (e) wall/ceiling finishes. insulate exposed exterior wall cavites to title 24… |
| 202608046060 | Plumbing / water heater / sewer | issued | Iss. Aug 4, 2026 | $28,192 | interior in-kind remodel, (e) footprint. remove (e) wall tile, fixtures and flooring. re-tile and reset fixtures in (e) … |
| 202605261823 | Remodel / interior alteration | filed | App. Jul 14, 2026 | $15,000 | partial remodel of an existing detached garage. |
| 202605070847 | Accessory dwelling unit (new or conversion) | filed | App. Jul 14, 2026 | $260,000 | construction of new adu in rear lot yard, type v-b, 2-story adu. |