15 Madrona Ave
Ross 94957 · Ross · Coordinates: 37.95912, -122.56128
Parcel & Assessor
- Lot size:
- 65,209 sq ft (1.50 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 15 MADRONA AVE
Zoning & Land Use
R-1_B-A — SINGLE FAMILY RESIDENTIAL (Ross)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-1_B-A (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-1_B-A, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-1_B-A, a single-family residential zone. The lot is 65,209 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
- Moderate Fire Hazard Severity Zone (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0458F, 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: $4,117,000 – $5,571,000 · Status: Off market
HUD Small Area FMR (ZIP 94957) · FY 2026
Studio $3,110 · 1BR $3,730 · 2BR $4,510 · 3BR $5,760 · 4BR $5,970
Nearby Activity (½ mile radius, since October 2024)
18 active or recent development projects (17 housing units across completed, permitted, and pipeline stages) and 115 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- 147 Lagunitas (Issued)0.12 mi N
Active in "Issued" for 3.7 yr (first record Feb 28, 2023) with no new permit activity recorded in 3.7 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
- New home at 75 Rock Rd (Issued)0.35 mi SE
Active in "Issued" for 2.2 yr (first record Aug 27, 2024) with no new permit activity recorded in 17 mo. High-impact scale (1 housing unit, $936,400 declared valuation across 1 permit).
- Accessory dwelling unit at 55 Redwood Dr A D U 55 A (Issued)0.4 mi E
Active in "Issued" for 17 mo (first record Jun 12, 2025) with no new permit activity recorded in 10 mo. High-impact scale (1 housing unit, $895,000 declared valuation across 1 permit).
- 9 Thomas (Entitled)390 ft NW
Active in "Entitled" for 2.3 yr (first record Jul 16, 2024) with no new permit activity recorded in 2.3 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).