Alameda County property record for 3939 Smith St, Union City, CA 94587
| Property Type | Commercial Office |
|---|---|
| Details | 6 bd · 2 ba · 4,151 sqft · built 1931 |
| Lot Size | 0.372 acres (16,200 sqft) |
| Owner | Company Name on File |
| Tax Bill | $2,482 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 483-10-32-1 |
| Primary APN | 483-10-32-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 12 Rooms |
| Units | 6 Units |
| Stories | 2 Stories |
| Building Area | 4,151 sqft Total Area |
| Year Built | Built 1931 |
|---|---|
| Effective Year Built | Effective 1958 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Fire Resistance | Wood or Wood & Steel Frame |
| Lot Area | 16,200 sqft (0.372 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 3939 SMITH ST |
|---|---|
| City | UNION CITY |
| State | CA |
| Zip | 94587-2615 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | LOT: 00007 BLK: 0079 MP: 0017 PAGE: 0054 ;LOT: 00008 BLK: 0079 MP: 0017 PAGE: 0054 ;LOT: 00009 BLK: 0079 MP: 0017 PAGE: 0054 |
| Legal Subdivision | ALVARADO |
| Legal Block | 79 |
| Legal Lot Number | 7-9 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | FREMONT |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 440331 |
3939 Smith St, a commercial property, is owned by a company.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 3939 SMITH ST, UNION CITY, CA 94587-2615 |
| Owner Type | Company |
| Vesting | Company |
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 |
|---|---|
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 3939 Smith St was $2,482.
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 | $100,851 (+2%) Land $24,034 Building $76,817 | |
| 2025 | $2,482.00 | $98,874 Land $23,563 Building $75,311 |
| 2023 | $2,337.00 | $95,035 Land $22,648 Building $72,387 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3939 Smith St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| 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 3939 Smith 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 | Direct burnable vegetation |
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 602 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| RobinsonHSS Fixed Wireless | 1,000 / 1,000 |
| Tekify Fiber & Wireless Fixed Wireless | 580 / 125 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fixed Wireless in parts of the area | 100 / 20 |
May also be available: GeoLinks, Verizon.
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