6228 Plymouth Ave
Richmond 94805 · Unincorporated Contra Costa · Coordinates: 37.94417, -122.31451
Parcel & Assessor
- Lot size:
- 4,477 sq ft (0.10 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 85049
- Addresses on lot:
- 6228 PLYMOUTH AVE
Zoning & Land Use
R-6 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUPossible, with conditions
Zoned R-6 (single-family residential): state law allows ADUs where homes are allowed. Very High Fire Hazard Severity Zone covers all of the lot: cities may limit ADUs here for fire safety and evacuation.
- SB 9: two homes on the lotPossible, with conditions
Zoned R-6, a single-family residential zone. Very High Fire Hazard Severity Zone (local responsibility area) covers all of the lot: SB 9 requires the project to meet the fire hazard mitigation standards. Alquist-Priolo Earthquake Fault Zone covers all 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-6, a single-family residential zone. The lot is 4,477 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. Very High Fire Hazard Severity Zone (local responsibility area) covers all of the lot: SB 9 requires the project to meet the fire hazard mitigation standards. Alquist-Priolo Earthquake Fault Zone covers all 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
- Very High Fire Hazard Severity Zone (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06013C0229H, effective March 21, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Alquist-Priolo Earthquake Fault Zone (Richmond quadrangle) (all of the lot)
Surrounding Rent & Value Benchmarks (Public Records)
Range: $576,000 – $780,000 · Status: Off market
HUD Small Area FMR (ZIP 94805) · FY 2026
Studio $1,980 · 1BR $2,200 · 2BR $2,690 · 3BR $3,440 · 4BR $4,080
Nearby Activity (½ mile radius, since November 2024)
6 active or recent development projects (6 housing units across completed, permitted, and pipeline stages) and 30 total building permits recorded within ½ mile.
- Additions & renovations3 permits
- Building systems24 permits
- Other3 permits
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)On this parcel
Active in "Entitled" for 4.1 yr (first record Oct 3, 2022) with no new permit activity recorded in 4.1 yr.
- New home (Issued)0.1 mi SE
Active in "Issued" for 4.5 yr (first record May 12, 2022) with no new permit activity recorded in 4.5 yr.
- New home (Issued)0.11 mi E
Active in "Issued" for 8 yr (first record Nov 20, 2018) with no new permit activity recorded in 8 yr.
- New home (Entitled)0.16 mi SW
Active in "Entitled" for 7.7 yr (first record Mar 6, 2019) with no new permit activity recorded in 7.7 yr.
Permit & Project History on This Parcel (0 permits, 2 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 2 entries (report years 2022, 2023).