23 Mercury Ave
Tiburon 94920 · Tiburon · Coordinates: 37.90037, -122.48898
Parcel & Assessor
- Lot size:
- 13,939 sq ft (0.32 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 23 MERCURY AVE; 23 MERCURY AVE UNIT A
Zoning & Land Use
R-1 — Single Family Residential (Tiburon)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-1, a single-family residential zone. The lot is 13,939 sq ft by the assessor, 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 06041C0488E, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $3,089,000 – $4,179,000 · Status: Off market
HUD Small Area FMR (ZIP 94920) · FY 2026
Studio $2,820 · 1BR $3,380 · 2BR $4,100 · 3BR $5,230 · 4BR $5,420
Nearby Activity (½ mile radius, since October 2024)
7 active or recent development projects (7 housing units across completed, permitted, and pipeline stages) and 1 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- New home (Issued)On this parcel
Active in "Issued" for 18 mo (first record Apr 22, 2025) with no new permit activity recorded in 18 mo.
- New home (Issued)390 ft E
Active in "Issued" for 2.7 yr (first record Jan 30, 2024) with no new permit activity recorded in 2.7 yr.
- New home (Entitled)0.16 mi W
Active in "Entitled" for 6.9 yr (first record Dec 10, 2019) with no new permit activity recorded in 6.9 yr.
- New home (Entitled)0.17 mi SE
Active in "Entitled" for 8.1 yr (first record Sep 20, 2018) with no new permit activity recorded in 8.1 yr.
Permit & Project History on This Parcel (0 permits, 1 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 1 entry (report years 2025).