2085 Shell Ridge Trl
Walnut Creek 94598 · Unincorporated Contra Costa · Coordinates: 37.90947, -121.99827
Parcel & Assessor
- Lot size:
- 43,865 sq ft (1.01 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 79034
- Addresses on lot:
- 2085 SHELL RIDGE TRL
Zoning & Land Use
R-40 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-40 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned R-40, a single-family residential zone. Alquist-Priolo Earthquake Fault Zone covers about 31% of the lot: the project must meet the seismic building standards, and a fault study is usually required.
- SB 9: split into two lotsPossible, with conditions
Zoned R-40, a single-family residential zone. The lot is 43,865 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. Alquist-Priolo Earthquake Fault Zone covers about 31% of the lot: the project must meet the seismic building standards, and a fault study is usually required.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (Local Responsibility Area) (about 25% of the lot, map Mar 24, 2025); Moderate Fire Hazard Severity Zone (Local Responsibility Area) (about 75% of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06013C0315F, effective June 16, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Alquist-Priolo Earthquake Fault Zone (Clayton quadrangle) (about 31% of the lot)
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,297,000 – $1,755,000 · Status: Off market
HUD Small Area FMR (ZIP 94598) · FY 2026
Studio $2,850 · 1BR $3,180 · 2BR $3,880 · 3BR $4,960 · 4BR $5,880
Nearby Activity (½ mile radius, since —)
2 active or recent development projects (2 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)On this parcel
Active in "Entitled" for 2.5 yr (first record Apr 23, 2024) with no new permit activity recorded in 2.5 yr.
- New home (Issued)490 ft NE
Active in "Issued" for 2.5 yr (first record Apr 25, 2024) with no new permit activity recorded in 2.5 yr.
- New home (Entitled)490 ft NE
Active in "Entitled" for 2.5 yr (first record Apr 25, 2024) with no new permit activity recorded in 2.5 yr.
- New home (Entitled)0.15 mi E
Active in "Entitled" for 7.4 yr (first record Jun 25, 2019) with no new permit activity recorded in 7.4 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 2024).