3100 Walnut Blvd
Walnut Creek 94596 · Unincorporated Contra Costa · Coordinates: 37.89699, -122.04514
Parcel & Assessor
- Lot size:
- 23,958 sq ft (0.55 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 98004
- Addresses on lot:
- 3100 WALNUT BLVD
Zoning & Land Use
R-20 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-20 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-20, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-20, a single-family residential zone. The lot is 23,958 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 06013C0293G, effective March 21, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,005,000 – $1,359,000 · Status: Off market
HUD Small Area FMR (ZIP 94596) · FY 2026
Studio $2,460 · 1BR $2,740 · 2BR $3,350 · 3BR $4,280 · 4BR $5,080
Nearby Activity (½ mile radius, since —)
6 active or recent development projects (6 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 17 mo (first record Jun 16, 2025) with no new permit activity recorded in 17 mo.
- 10 new homes (Entitled)0.2 mi SE
Active in "Entitled" for 2.7 yr (first record Feb 27, 2024) with no new permit activity recorded in 2.7 yr. High-impact scale (10 housing units, 1 deed-restricted affordable across 0 permits).
- Coral Homes Duplexes (Entitled)0.49 mi W
Active in "Entitled" for 8.5 yr (first record May 16, 2018) with no new permit activity recorded in 8.5 yr. High-impact scale (4 housing units across 0 permits).
- New home (Entitled)0.14 mi SW
Active in "Entitled" for 7 yr (first record Nov 15, 2019) with no new permit activity recorded in 7 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).