680 Center St
Walnut Creek 94595 · Unincorporated Contra Costa · Coordinates: 37.89008, -122.07813
Parcel & Assessor
- Lot size:
- 39,814 sq ft (0.91 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 98002
- Addresses on lot:
- 680 CENTER ST
Zoning & Land Use
R-10 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-10 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned R-10, a single-family residential zone. FEMA regulatory floodway covers about 33% of the lot: SB 9 requires a no-rise certification.
- SB 9: split into two lotsPossible, with conditions
Zoned R-10, a single-family residential zone. The lot is 39,814 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. FEMA regulatory floodway covers about 33% of the lot: SB 9 requires a no-rise certification.
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 AE: regulatory floodway (Special Flood Hazard Area) (about 33% of the lot); Zone AE: 1% annual chance flood (Special Flood Hazard Area) (about 8% of the lot); Zone X: minimal flood hazard (about 53% of the lot); Zone X: minimal flood hazard (about 5% of the lot) · FIRM panel 06013C0289G, 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: $631,000 – $853,000 · Status: Off market
HUD Small Area FMR (ZIP 94595) · FY 2026
Studio $2,200 · 1BR $2,450 · 2BR $2,990 · 3BR $3,820 · 4BR $4,530
Nearby Activity (½ mile radius, since —)
18 active or recent development projects (18 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 (Issued)On this parcel
Active in "Issued" for 19 mo (first record Apr 8, 2025) with no new permit activity recorded in 19 mo.
- 2 new homes (Entitled)230 ft NW
Active in "Entitled" for 3 yr (first record Nov 15, 2023) with no new permit activity recorded in 3 yr.
- 2 new homes (Entitled)230 ft NW
Active in "Entitled" for 4.4 yr (first record Jun 18, 2022) with no new permit activity recorded in 4.4 yr.
- New home (Entitled)280 ft NW
Active in "Entitled" for 2.1 yr (first record Oct 2, 2024) with no new permit activity recorded in 2.1 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).