Contra Costa County property record for 309 Ross Ave, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,379 sqft · built 1953 |
| Lot Size | 0.129 acres (5,600 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $2,822 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 068-511-011-6 |
| Primary APN | 068-511-011-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,379 sqft Living Area |
| Gross Area | 1,747 sqft |
| 1st Floor Area | 1,379 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1953 |
| Exterior Material | Stucco |
| Roof Material | Tar & Gravel |
| Lot Area | 5,600 sqft (0.129 acres) |
| Garage Type | Attached |
| Garage Area | 368 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Wall Unit |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 309 ROSS AVE |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-2645 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | WOODLAND MANOR #3 LOT 98 |
| Legal Subdivision | WOODLAND MANOR 03 |
| Legal Lot Number | 98 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 3 |
| Census Block | 3009 |
| Census Tract | 306003 |
309 Ross Ave is owner-occupied and held in a trust since June 2006.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 309 ROSS AVE, ANTIOCH, CA 94509-2645 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Jun 1, 2006 |
| Transfer Doc | 0000221953 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 309 Ross Ave was $2,822 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 | $211,991 (+2%) Land $106,086 Building $105,905 | |
| 2025 | $2,822.00 Homeowner's exemption | $207,835 Land $104,006 Building $103,829 |
| 2023 | $2,661.00 (+1.49%) Homeowner's exemption | $199,767 Land $99,968 Building $99,799 |
| 2022 | $2,622.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 309 Ross Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1998.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
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 309 Ross Ave 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 741 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures