Alameda County property record for 4278 Comet Cir, Union City, CA 94587
| Property Type | Townhouse |
|---|---|
| Details | 3 bd · 2 ba · 1,255 sqft · built 1972 |
| Lot Size | 0.033 acres (1,474 sqft) |
| Owner | Company Name on Record |
| Last Sale | $270,000 (Nov 2000) |
| Tax Bill | $5,971 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 483-102-56 |
| Primary APN | 483-102-56 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,255 sqft Living Area |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1973 |
| Architectural Style | Other |
| Construction Type | Wood |
| Lot Area | 1,474 sqft (0.033 acres) |
| Street Address | 4278 COMET CIR |
|---|---|
| City | UNION CITY |
| State | CA |
| Zip | 94587-4026 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Townhouse |
| Legal Description | TR 3307 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | FREMONT |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 440306 |
Source: Alameda County records, as of October 20, 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 4278 COMET CIR, UNION CITY, CA 94587-4026 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 28, 2000 · Amount on Record |
| Deed Sale | Nov 28, 2000 · Amount on Record |
| Prior Sale | Sep 10, 2001 |
| Deed Document Number | 0000348867 |
| Deed Book / Page | 483 |
| Last Transfer Date | Jul 16, 2015 |
| Transfer Doc | 0000196875 |
| Record Updated | Jun 8, 2026 |
Source: Alameda County assessment roll, as of July 1, 2025
| 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 |
|---|---|---|
| 2025 | $5,971.00 (+0.15%) | $406,816 (+4.04%) Land $122,045 Building $284,771 |
| 2023 | $5,962.00 Homeowner's exemption | $391,021 Land $117,306 Building $273,715 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 2 in force |
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | Under 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 712 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Unwired, Verizon.
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