Contra Costa County property record for 515 W 12th St, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.5 ba · 1,173 sqft · built 1929 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | Individual Name on File |
| Last Sale | $170,000 (Sep 2016) |
| Tax Bill | $2,782 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 067-132-007-5 |
| Primary APN | 067-132-007-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,173 sqft Living Area |
| 1st Floor Area | 1,173 sqft |
| Year Built | Built 1929 |
|---|---|
| Effective Year Built | Effective 1935 |
| Lot Area | 5,000 sqft (0.115 acres) |
| Garage Type | Attached |
| Garage Area | 198 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Central |
|---|
| Street Address | 515 W 12TH ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-2261 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R2 |
| Legal Description | SOUTH PARK ADDN LOT 4 BLK 5 |
| Legal Subdivision | SOUTH PARK ADD |
| Legal Block | 5 |
| Legal Lot Number | 4 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 305000 |
Source: Contra Costa County assessment roll, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 515 W 12TH ST, ANTIOCH, CA 94509-2261 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Sep 20, 2016 · Amount on Record |
| Deed Sale | Sep 20, 2016 · Amount on Record |
| Deed Document Number | 2016192882 |
| Prior Transfer Date | Dec 8, 2015 |
| Prior Transfer Doc | 0000264535 |
| 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 | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $201,238 (+2%) Land $106,301 Building $94,937 | |
| 2025 | $2,782.00 (+5.94%) | $197,293 (+4.04%) Land $104,217 Building $93,076 |
| 2023 | $2,626.00 (+1.43%) | $189,633 Land $100,171 Building $89,462 |
| 2022 | $2,589.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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 605 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: T-Mobile USA, Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures