831 Coachman Pl
Clayton 94517 · Unincorporated Contra Costa · Coordinates: 37.92969, -121.94120
Parcel & Assessor
- Lot size:
- 42,549 sq ft (0.98 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 79061
- Addresses on lot:
- 831 COACHMAN PL
Zoning & Land Use
R-40 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUPossible, with conditions
Zoned R-40 (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-40, a single-family residential zone. Very High Fire Hazard Severity Zone (State responsibility area) covers all of the lot: SB 9 requires the project to meet the fire hazard mitigation standards.
- SB 9: split into two lotsPossible, with conditions
Zoned R-40, a single-family residential zone. The lot is 42,549 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 (State responsibility area) covers all of the lot: SB 9 requires the project to meet the fire hazard mitigation standards.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Very High Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06013C0312F, 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: $973,000 – $1,317,000 · Status: Off market
HUD Small Area FMR (ZIP 94517) · FY 2026
Studio $2,610 · 1BR $2,970 · 2BR $3,620 · 3BR $4,630 · 4BR $5,500
Nearby Activity (½ mile radius, since —)
2 active or recent development projects (2 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 6.8 yr (first record Jan 21, 2020) with no new permit activity recorded in 6.8 yr.
- detached single-family residence (Issued)0.37 mi NE
Active in "Issued" for 22 mo (first record Jan 10, 2025) with no new permit activity recorded in 22 mo.
- Conversion Of Existing Habitable Detached Workshop Space To An Accessory Dwelling Unit (Issued)0.44 mi NE
Active in "Issued" for 23 mo (first record Dec 18, 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 2020).