Contra Costa County property record for 1523 Walnut Ave, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,069 sqft · built 1953 |
| Lot Size | 0.347 acres (15,125 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $120,000 (Jul 2011) |
| Tax Bill | $1,747 (2025) |
| Deeds & Mortgages | Jan 2026 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 051-073-015-3 |
| Primary APN | 051-073-015-3 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,069 sqft Living Area |
| 1st Floor Area | 1,069 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1958 |
| Lot Area | 15,125 sqft (0.347 acres) |
| Garage Type | Attached |
| Garage Area | 243 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 1523 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 N 55 FT OF LOT 34 |
| Legal Subdivision | VIERA SUB |
| Legal Lot Number | 34 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2016 |
| Census Tract | 306002 |
1523 Walnut Ave is owned and occupied by two individuals who acquired it in December 2016.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 1523 WALNUT AVE, ANTIOCH, CA 94509-7224 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
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 Sale | Jul 8, 2011 · Amount on File |
| Deed Sale | Jul 8, 2011 · Amount on File |
| Deed Document Number | 2011134113 |
| Last Transfer Date | Dec 20, 2016 |
| Transfer Doc | 0000275757 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jan 30, 2026 |
| Property Address | 1523 WALNUT AVE, ANTIOCH, CA 94509-7224 |
| Document Number | 0000009855 |
| Map Reference | MB 27 PG 15 |
| Instrument Date | Jan 30, 2026 |
| Instrument | 2026- 009855 |
| Transaction Type | Transfer |
| Record Updated | Feb 11, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Right of Survivorship |
| Address | 1523 WALNUT AVE, ANTIOCH, CA 94509-7224 |
The 2025 property tax bill for 1523 Walnut Ave was $1,747.
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 | $153,727 (+2%) Land $64,051 Building $89,676 | |
| 2025 | $1,747.00 | $150,714 Land $62,796 Building $87,918 |
| 2023 | $1,678.00 (+1.7%) | $144,863 Land $60,358 Building $84,505 |
| 2022 | $1,650.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1523 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 1523 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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