Contra Costa County property record for 421 W 10th St, Antioch, CA 94509 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,383 sqft · built 1907 |
| Lot Size | 0.189 acres (8,250 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $163,000 (Apr 2008) |
| Tax Bill | $2,966 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 067-070-015-2 |
| Primary APN | 067-070-015-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,383 sqft Living Area |
| 1st Floor Area | 1,383 sqft |
| Year Built | Built 1907 |
|---|---|
| Effective Year Built | Effective 1907 |
| Lot Area | 8,250 sqft (0.189 acres) |
| Garage Type | Attached |
| Garage Area | 175 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|
| Street Address | 421 W 10TH ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-1651 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | SOUTH PARK ADDN POR LOT 1 BLK 1 |
| Legal Subdivision | SOUTH PARK ADD |
| Legal Block | 1 |
| Legal Lot Number | 1 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2001 |
| Census Tract | 305000 |
Source: Contra Costa County records · APN 067-070-015-2
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 421 W 10TH ST, ANTIOCH, CA 94509-1651 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Apr 11, 2008 · Amount on Record |
| Deed Sale | Apr 11, 2008 · Amount on Record |
| Prior Sale | May 30, 2007 · Amount on Record |
| Deed Document Number | 200878265 |
| Prior Transfer Date | Feb 14, 2007 |
| Prior Transfer Doc | 0000047241 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Antioch City |
| Unified School District | Antioch Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $217,966 (+2%) Land $133,969 Building $83,997 | |
| 2025 | $2,966.00 (+5.85%) | $213,693 (+4.04%) Land $131,343 Building $82,350 |
| 2023 | $2,802.00 (+1.45%) | $205,397 Land $126,244 Building $79,153 |
| 2022 | $2,762.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
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