521 Market Ave
Richmond 94801 · Unincorporated Contra Costa · Coordinates: 37.95891, -122.36352
Parcel & Assessor
- Lot size:
- 5,086 sq ft (0.12 ac)
- Assessor use:
- Vacant, 1 site (includes PUD sites)
- Tax rate area:
- 85075
- Addresses on lot:
- 521 MARKET AVE
Zoning & Land Use
HE-C — Housing Element Consistency (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned HE-C (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs. The assessor lists the lot as vacant: an ADU needs an existing or proposed main home.
- SB 9: two homes on the lotCan't tell
Zoned HE-C (multifamily residential): we can't tell whether it counts as a single-family zone for SB 9. Housing Element Consistency: sites rezoned for housing; check the site's allowed density.
- SB 9: split into two lotsCan't tell
Zoned HE-C (multifamily residential): we can't tell whether it counts as a single-family zone for SB 9. Housing Element Consistency: sites rezoned for housing; check the site's allowed density.
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 06013C0228G, effective September 30, 2015
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $150,000 – $204,000 · Status: Off market
HUD Small Area FMR (ZIP 94801) · FY 2026
Studio $1,750 · 1BR $1,990 · 2BR $2,420 · 3BR $3,090 · 4BR $3,670
Nearby Activity (½ mile radius, since October 2024)
15 active or recent development projects (27 housing units across completed, permitted, and pipeline stages) and 13 total building permits recorded within ½ mile.
- New construction7 permits (13 units)
- Building systems4 permits
- Other2 permits
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)On this parcel
Active in "Entitled" for 3.6 yr (first record Mar 14, 2023) with no new permit activity recorded in 3.6 yr.
- 40 new homes (Entitled)0.38 mi E
Active in "Entitled" for 3.3 yr (first record Jun 27, 2023) with no new permit activity recorded in 3.3 yr. High-impact scale (40 housing units, 40 deed-restricted affordable across 0 permits).
- 6 new homes at 1329 Fred Jackson Way (Issued)0.48 mi SW
Active in "Issued" for 22 mo (first record Dec 18, 2024) with no new permit activity recorded in 21 mo. High-impact scale (6 housing units, $3,090,036 declared valuation across 2 permits).
- New home (Entitled)280 ft W
Active in "Entitled" for 2.4 yr (first record Jun 6, 2024) with no new permit activity recorded in 2.4 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: 2 entries (report years 2023, 2024).