Contra Costa County property record for 600 L St, Antioch, CA 94509
| Property Type | Federal Property (Exempt) |
|---|---|
| Details | 2 bd · 2 ba · 1,244 sqft · built 1940 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | Company Name on File |
| Flood Zone | Zone X (minimal risk) |
| APN | 066-128-001-6 |
| Primary APN | 066-128-001-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Building Area | 1,244 sqft |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1940 |
| Lot Area | 5,000 sqft (0.115 acres) |
| Lot Dimensions | 100 ft deep x 50 ft wide |
| Heating Fuel | Gas |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 600 L ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509 |
| Property Category | Public Works |
| Property Type | Public Works > Federal Property (Exempt) |
| Local Zoning Code | R1 |
| Legal Description | TOWN OF ANTIOCH POR LOTS 1 & 2 BLK 48 |
| Legal Subdivision | TOWN ANTIOCH |
| Legal Block | 48 |
| Legal Lot Number | 1,2 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 5 |
| Census Block | 5015 |
| Census Tract | 305000 |
600 L St, a public works property, is owned by a company.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | PO BOX 5007, ANTIOCH, CA 94531-5007 |
| Owner Type | 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 |
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 | Assessed Value |
|---|---|
| 2026 | $119,032 Land $119,032 |
| 2023 | $112,168 Land $112,168 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 600 L 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 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 File 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.
The area around 600 L St 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 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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