Alameda County property record for 4259 Horner St, Union City, CA 94587
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 1,870 sqft · built 1994 |
| Lot Size | 0.113 acres (4,905 sqft) |
| Owner | Individual Name on File |
| Last Sale | $568,000 (Apr 2008) |
| Tax Bill | $10,351 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 482-10-49 |
| Primary APN | 482-10-49 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 1,870 sqft Living Area |
| Year Built | Built 1994 |
|---|---|
| Effective Year Built | Effective 1994 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 4,905 sqft (0.113 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4259 HORNER ST |
|---|---|
| City | UNION CITY |
| State | CA |
| Zip | 94587-2521 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00025 BLK: TR: 6097 |
| Legal Tract | 6097 |
| Legal Lot Number | 25 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | FREMONT |
| Census Block Group | 1 |
| Census Block | 1009 |
| Census Tract | 440331 |
4259 Horner St is owned and occupied by an individual who acquired it in August 2012.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 4259 HORNER ST, UNION CITY, CA 94587-2521 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 25, 2008 · Amount on File |
| Deed Sale | Apr 25, 2008 · Amount on File |
| Prior Sale | Sep 23, 1994 · Amount on File |
| Deed Document Number | 2008139841 |
| Last Transfer Date | Aug 2, 2012 |
| Transfer Doc | 0000262132 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4259 Horner St was $10,351.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Municipality | Union City |
| Unified School District | New Haven Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $760,943 (+2%) Land $228,283 Building $532,660 | ||
| 2025 | $10,351.00 | $746,027 Land $223,808 Building $522,219 | |
| 2023 | $10,323.00 | $717,065 Land $215,119 Building $501,946 | $1,059,930 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4259 Horner St in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 23 individual policies |
| Nearby Flood Policies | 25 units insured incl. 2 condo units |
| Nearby Flood Claims | 1 (1986) |
| Most Recent Claim | Mar 1986 · Severe Storms & Flooding |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 4259 Horner St is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Indirect within ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | ALAMEDA COUNTY WATER DISTRICT serves 344,000 people · EPA ID CA0110001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Nov 2025 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 621 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| RobinsonHSS Fixed Wireless | 1,000 / 1,000 |
| Tekify Fiber & Wireless Fixed Wireless | 570 / 120 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
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