Contra Costa County property record for 508 K St, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,408 sqft · built 1946 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | Individual Name on Record |
| Tax Bill | $2,614 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 066-134-001-8 |
| Primary APN | 066-134-001-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,408 sqft Living Area |
| 1st Floor Area | 1,408 sqft |
| Year Built | Built 1946 |
|---|---|
| Effective Year Built | Effective 1946 |
| Lot Area | 5,000 sqft (0.115 acres) |
| Garage Type | Attached |
| Garage Area | 216 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 508 K ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R3 |
| Legal Description | TOWN OF ANTIOCH LOT 12 BLK 36 |
| Legal Subdivision | ANTIOCH |
| Legal Block | 36 |
| Legal Lot Number | 12 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 5 |
| Census Block | 5011 |
| Census Tract | 305000 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 508 K ST, ANTIOCH, CA 94509 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 20, 1999 |
| Deed Sale | Jul 20, 1999 |
| Deed Document Number | 1999190383 |
| Last Transfer Date | Oct 19, 2006 |
| Transfer Doc | 0000349758 |
| Record Updated | Sep 20, 2026 |
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 | $186,619 (+2%) Land $77,586 Building $109,033 | |
| 2025 | $2,614.00 (+6.09%) | $182,961 (+4.04%) Land $76,065 Building $106,896 |
| 2023 | $2,464.00 (+1.4%) | $175,858 Land $73,112 Building $102,746 |
| 2022 | $2,430.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 12, 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 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 16 policies |
| Nearby Flood Policies | 16 in force |
| Nearby Flood Claims | 47 (1982–2022) |
| Claims Outside the SFHA | 15 of 47 |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
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 | 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 372 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
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