Contra Costa County property record for 3404 Serpentine Dr, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,625 sqft · built 1980 |
| Lot Size | 0.176 acres (7,665 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $3,863 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 068-561-005-7 |
| Primary APN | 068-561-005-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,625 sqft Living Area |
| 1st Floor Area | 1,625 sqft |
| Year Built | Built 1980 |
|---|---|
| Effective Year Built | Effective 1981 |
| Lot Area | 7,665 sqft (0.176 acres) |
| Garage Type | Attached |
| Garage Area | 472 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 3404 SERPENTINE DR |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-5181 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | T05510 L0601 B EX 1/2 MR |
| Legal Tract | 05510 |
| Legal Lot Number | 601 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2022 |
| Census Tract | 308001 |
3404 Serpentine Dr is owner-occupied and held in a trust since December 2005.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 3404 SERPENTINE DR, ANTIOCH, CA 94509-5181 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
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 Transfer Date | Dec 19, 2005 |
| Transfer Doc | 0000059150 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 3404 Serpentine Dr was $3,863 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Antioch City |
| Unified School District | Antioch Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $307,107 (+2%) Land $76,419 Building $230,688 | |
| 2025 | $3,863.00 Homeowner's exemption | $301,086 Land $74,921 Building $226,165 |
| 2023 | $3,658.00 (+1.55%) Homeowner's exemption | $289,396 Land $72,012 Building $217,384 |
| 2022 | $3,602.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3404 Serpentine Dr in Zone X, an area of moderate flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 3404 Serpentine Dr has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land 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 | CITY OF ANTIOCH serves 116,781 people · EPA ID CA0710001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2024 |
| 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 613 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
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