24538 Oneil Ave
Hayward 94544 · Hayward · Coordinates: 37.66246, -122.07758
Executive Verdict · Public-Records Synthesis
Zoned MB-CN in Hayward with likely ministerial ADU eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $1,142,000 ($971,000–$1,313,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone MB-CN 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)
- ! Delayed or open permit activity on this parcel
4 new homes: Active in "Issued" for 21 mo (first record Feb 24, 2025) with no new permit activity recorded in 21 mo. High-impact scale (4 housing units across 0 permits).
Source: Alameda County building permits (review-time benchmark)
- ! 5 slow or stalled nearby projects within ½ mile
Closest lead: Berry Ave Multifamily (0.48 mi SE, entitled). 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:
- 5,118 sq ft (0.12 ac)
- Assessor use:
- Vacant residential land, zoned 4 units or less
- Tax rate area:
- 25
- Addresses on lot:
- 24538 ONEIL AVE; 24538 ONEIL AVE UNIT 1; 24538 ONEIL AVE UNIT 2
Zoning & Land Use
MB-CN — Mission Boulevard - Corridor Neighborhood - 17.5 To 35 Units/Acre (Hayward)
MB-CN — Mission Boulevard - Corridor Neighborhood - 17.5 To 35 Units/Acre (Hayward)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned MB-CN (mixed use): state law allows ADUs where homes are allowed. The parcel point also falls in MB-CN. 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 lotUnlikely
Zoned MB-CN (mixed use), not a single-family residential zone. The parcel point also falls in MB-CN.
- SB 9: split into two lotsUnlikely
Zoned MB-CN (mixed use), not a single-family residential zone. The parcel point also falls in MB-CN.
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
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $971,000 – $1,313,000 · 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 —)
5 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
- 4 new homes (Issued)On this parcel
Active in "Issued" for 21 mo (first record Feb 24, 2025) with no new permit activity recorded in 21 mo. High-impact scale (4 housing units across 0 permits).
- Berry Ave Multifamily (Entitled)0.48 mi SE
Active in "Entitled" for 5.5 yr (first record May 27, 2021) with no new permit activity recorded in 5.5 yr. High-impact scale (18 housing units, 2 deed-restricted affordable across 0 permits).
- Belmont Estates-Tract 11371-25107 Belmont (PR-00 (Issued)0.41 mi SE
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)0.41 mi SE
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).
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 2025).