100 Folsom Ave
Hayward 94544 · Hayward · Coordinates: 37.62859, -122.05729
Parcel & Assessor
- Lot size:
- 9,411 sq ft (0.22 ac)
- Assessor use:
- 2 units, SFR with detached accessory dwelling unit
- Tax rate area:
- 25
- Addresses on lot:
- 100 FOLSOM AVE
Zoning & Land Use
RLB4 — Low Density Residential - Min. Lot Size - 4,000 Sq Ft (Hayward)
RLB4 — Low Density Residential - Min. Lot Size - 4,000 Sq Ft (Hayward)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RLB4 (single-family residential): state law allows ADUs where homes are allowed. We read RLB4 from the zoning code's name; we haven't checked it against Hayward's code text. The parcel point also falls in RLB4.
- SB 9: two homes on the lotLikely eligible
Zoned RLB4, a single-family residential zone. We read RLB4 from the zoning code's name; we haven't checked it against Hayward's code text. The parcel point also falls in RLB4.
- SB 9: split into two lotsLikely eligible
Zoned RLB4, a single-family residential zone. We read RLB4 from the zoning code's name; we haven't checked it against Hayward's code text. The parcel point also falls in RLB4. The lot is 9,411 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 06001C0293G, effective August 3, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $834,000 – $1,128,000 · Status: Off market
HUD Small Area FMR (ZIP 94544) · FY 2026
Studio $2,100 · 1BR $2,330 · 2BR $2,850 · 3BR $3,640 · 4BR $4,320
Nearby Activity (½ mile radius, since —)
12 active or recent development projects (12 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)0.26 mi W
Active in "Issued" for 20 mo (first record Mar 5, 2025) with no new permit activity recorded in 20 mo.
- New home (Issued)0.32 mi NE
Active in "Issued" for 3 yr (first record Nov 1, 2023) with no new permit activity recorded in 3 yr.
- New home (Issued)0.49 mi N
Active in "Issued" for 17 mo (first record May 23, 2025) with no new permit activity recorded in 17 mo.
- Addition - 878 Folsom Avenue (Entitled)0.5 mi SW
Active in "Entitled" for 20 mo (first record Mar 4, 2025) with no new permit activity recorded in 20 mo.
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: 3 entries (report years 2021, 2022, 2024).