Alameda County property record for 33863 10th St, Union City, CA 94587
| Property Type | Quadplex |
|---|---|
| Details | 9 bd · 4 ba · 3,482 sqft · built 1972 |
| Lot Size | 0.138 acres (6,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $580,000 (May 2003) |
| Tax Bill | $13,555 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 486-30-14-2 |
| Primary APN | 486-30-14-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 9 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 17 Rooms |
| Units | 4 Units |
| Stories | 2 Stories |
| Building Area | 3,482 sqft Living Area |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1972 |
| Construction Type | Wood |
| Lot Area | 6,000 sqft (0.138 acres) |
| Lot Dimensions | 100 ft deep x 60 ft wide |
| Heating System | HVAC |
|---|
| Street Address | 33863 10TH ST |
|---|---|
| City | UNION CITY |
| State | CA |
| Zip | 94587-3455 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Legal Description | LOT: 00002 BLK: 0014 AR: 0486 PAGE: 0030 |
| Legal Subdivision | DECOTO |
| Legal Block | E |
| Legal Lot Number | 10 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | FREMONT |
| Census Block Group | 2 |
| Census Block | 2012 |
| Census Tract | 440200 |
33863 10th St, a quadplex, is owned by two individuals who acquired it in January 2004.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4408 QUEENSBORO WAY, UNION CITY, CA 94587-3848 |
| 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 | 2 Names on Deed |
|---|---|
| Last Sale | May 22, 2003 · Amount on File |
| Deed Sale | May 22, 2003 · Amount on File |
| Prior Sale | Jun 28, 2000 · Amount on File |
| Deed Document Number | 2003298745 |
| Last Transfer Date | Jan 28, 2004 |
| Transfer Doc | 0000039722 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 33863 10th St was $13,555.
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 |
|---|---|---|
| 2026 | $856,751 (+2%) Land $257,025 Building $599,726 | |
| 2025 | $13,555.00 | $839,955 Land $251,986 Building $587,969 |
| 2023 | $15,394.00 | $807,347 Land $242,204 Building $565,143 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 33863 10th St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 33863 10th 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 | None beyond 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 220 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| Tekify Fiber & Wireless Fixed Wireless | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable · Fiber in parts of the area | 2,000 / 250 |
| RobinsonHSS Fixed Wireless | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: GeoLinks, Sail Internet, T-Mobile.
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