20 Carmello Rd
Walnut Creek 94597 · Unincorporated Contra Costa · Coordinates: 37.90455, -122.07220
Parcel & Assessor
- Lot size:
- 62,503 sq ft (1.43 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 98002
- Addresses on lot:
- 20 CARMELLO RD
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 62,503 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 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: $921,000 – $1,245,000 · Status: Off market
HUD Small Area FMR (ZIP 94597) · FY 2026
Studio $2,390 · 1BR $2,660 · 2BR $3,250 · 3BR $4,160 · 4BR $4,930
Nearby Activity (½ mile radius, since —)
9 active or recent development projects (9 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- WCTV Phase II (Issued)0.18 mi E
Active in "Issued" for 7.7 yr (first record Mar 5, 2019) with no new permit activity recorded in 7.7 yr. High-impact scale (358 housing units across 0 permits).
- 1910 NoMa (Entitled)0.47 mi E
Active in "Entitled" for 8.2 yr (first record Aug 15, 2018) with no new permit activity recorded in 8.2 yr. High-impact scale (135 housing units, 11 deed-restricted affordable across 0 permits).
- New home (Entitled)0.14 mi NW
Active in "Entitled" for 8 yr (first record Nov 7, 2018) with no new permit activity recorded in 8 yr.
- New home (Issued)0.33 mi N
Active in "Issued" for 23 mo (first record Nov 27, 2024) with no new permit activity recorded in 23 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 2025).