Contra Costa County property record for 1515 Walnut Ave, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,283 sqft · built 1953 |
| Lot Size | 0.421 acres (18,358 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $1,876 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 051-082-014-5 |
| Primary APN | 051-082-014-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,283 sqft Living Area |
| 1st Floor Area | 1,283 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1953 |
| Lot Area | 18,358 sqft (0.421 acres) |
| Street Address | 1515 WALNUT AVE |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-7224 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10 |
| Legal Description | VIERA SUBN POR LOT 33 |
| Legal Subdivision | VIERA SUB |
| Legal Lot Number | 33 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2016 |
| Census Tract | 306002 |
1515 Walnut Ave is owned and occupied by an individual.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 1515 WALNUT AVE, ANTIOCH, CA 94509-7224 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
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 |
The 2025 property tax bill for 1515 Walnut Ave was $1,876 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 | $172,611 (+2%) Land $48,523 Building $124,088 | |
| 2025 | $1,876.00 Homeowner's exemption | $169,227 Land $47,572 Building $121,655 |
| 2023 | $1,798.00 (+1.81%) Homeowner's exemption | $162,658 Land $45,726 Building $116,932 |
| 2022 | $1,766.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1515 Walnut Ave in Zone X, an area of minimal flood risk.
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 |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 6 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.
Wildfire risk around 1515 Walnut Ave is low, with a 0.05% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 64% of the US · lower than 78% of California |
|---|---|
| Wildfire Likelihood | 0.05% annual chance |
| Exposure | Direct burnable vegetation |
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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 19 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| AT&T Fiber · Fixed Wireless in parts of the area | 1,000 / 1,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
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