25201 Delmar Ave
Hayward 94542 · Hayward · Coordinates: 37.65794, -122.07044
Executive Verdict · Public-Records Synthesis
Zoned RL in Hayward with likely ministerial ADU eligibility and mapped Alquist-Priolo fault due diligence; benchmark value $1,479,000 ($1,257,000–$1,701,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RL allows residential use qualifying for ministerial ADU review under state law.
Source: Hayward zoning · CA Gov. Code 66314
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! Alquist-Priolo Earthquake Fault Zone (all of the lot of lot)
Intersects a State-mapped surface fault rupture zone. Adding habitable structures or subdividing typically requires a site-specific geologic fault investigation.
Source: California Geological Survey Alquist-Priolo Zones
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: Belmont Estates-Tract 11371-25107 Belmont (PR-00 (470 ft NW, issued). Inspect timeline history before assuming near-term completion.
Source: Alameda County building permits · HCD APR (½-mile radius)
- ! Bulk building permits not published for Hayward
Permit counts and nearby activity on this page may omit municipal counter records. Request a parcel permit report directly from the local building department.
Source: Source coverage registry (Hayward)
Parcel & Assessor
- Lot size:
- 5,056 sq ft (0.12 ac)
- Assessor use:
- 2 units, SFR with detached accessory dwelling unit
- Tax rate area:
- 25
- Addresses on lot:
- 25201 DEL MAR AVE
Zoning & Land Use
RL — Low Density Residential - Min. Lot Size - 5,000 Sq Ft (Hayward)
RL — Low Density Residential - Min. Lot Size - 5,000 Sq Ft (Hayward)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RL (single-family residential): state law allows ADUs where homes are allowed. We read RL from the zoning code's name; we haven't checked it against Hayward's code text. The parcel point also falls in RL.
- SB 9: two homes on the lotPossible, with conditions
Zoned RL, a single-family residential zone. We read RL from the zoning code's name; we haven't checked it against Hayward's code text. The parcel point also falls in RL. 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 RL, a single-family residential zone. We read RL from the zoning code's name; we haven't checked it against Hayward's code text. The parcel point also falls in RL. The lot is 5,056 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. 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
- 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 06001C0287G, effective August 3, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Alquist-Priolo Earthquake Fault Zone (Hayward quadrangle) (all of the lot)
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,257,000 – $1,701,000 · Status: Off market
HUD Small Area FMR (ZIP 94542) · FY 2026
Studio $2,320 · 1BR $2,580 · 2BR $3,150 · 3BR $4,030 · 4BR $4,770
Nearby Activity (½ mile radius, since —)
8 active or recent development projects (8 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- Belmont Estates-Tract 11371-25107 Belmont (PR-00 (Issued)470 ft NW
Active in "Issued" for 2.2 yr (first record Sep 10, 2024) with no new permit activity recorded in 2.2 yr. High-impact scale (4 housing units across 0 permits).
- 4 new homes (Entitled)470 ft NW
Active in "Entitled" for 3.5 yr (first record May 10, 2023) with no new permit activity recorded in 3.5 yr. High-impact scale (4 housing units across 0 permits).
- New home (Issued)350 ft SE
Active in "Issued" for 2.3 yr (first record Jul 31, 2024) with no new permit activity recorded in 2.3 yr.
- Eldridge Residence (Entitled)430 ft N
Active in "Entitled" for 12 mo (first record Nov 10, 2025) with no new permit activity recorded in 12 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: 2 entries (report years 2022, 2024).