231 Walnut Ave
Walnut Creek 94598 · Walnut Creek · Coordinates: 37.91975, -122.03304
Parcel & Assessor
- Lot size:
- 10,951 sq ft (0.25 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 09010
- Addresses on lot:
- 231-A WALNUT 4; 231 WALNUT 4
Zoning & Land Use
No published city zoning district at parcel centroid.
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
We don't have a zoning map for Walnut Creek.
- SB 9: two homes on the lotCan't tell
We don't have a zoning map for Walnut Creek.
- SB 9: split into two lotsCan't tell
We don't have a zoning map for Walnut Creek.
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 06013C0291F, effective June 16, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,221,000 – $1,651,000 · 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 —)
4 active or recent development projects (4 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- Detached Adu (Issued)On this parcel
Active in "Issued" for 3 yr (first record Nov 1, 2023) with no new permit activity recorded in 3 yr.
- Detached Adu 800 Sf & Upgrade Electrical Panel To 200 Amp, 125 Amp For Adu & 100 Amp For Main Dwelling. (Issued)0.14 mi E
Active in "Issued" for 2 yr (first record Nov 4, 2024) with no new permit activity recorded in 2 yr.
- Manufactured ADU built to HUD specifications to be installed on property. REVISION: R25353 (Issued)0.43 mi E
Active in "Issued" for 13 mo (first record Oct 2, 2025) with no new permit activity recorded in 13 mo.
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 2023).