Contra Costa County property record for 613 W 12th St, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,008 sqft · built 1938 |
| Lot Size | 0.085 acres (3,700 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $465,000 (May 2025) |
| Tax Bill | $5,321 (2025) |
| Deeds & Mortgages | Sep 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 067-142-005-7 |
| Primary APN | 067-142-005-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,008 sqft Living Area |
| 1st Floor Area | 828 sqft |
| 2nd Floor Area | 180 sqft |
| Year Built | Built 1938 |
|---|---|
| Effective Year Built | Effective 1938 |
| Architectural Style | Bungalow |
| Exterior Material | Metal |
| Roof Material | Composition Shingle |
| Lot Area | 3,700 sqft (0.085 acres) |
| Garage Type | Attached |
| Garage Area | 180 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Wall Unit |
|---|---|
| Heating Fuel | Solar |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 613 W 12TH ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-2263 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R2 |
| Legal Description | NASON ADDN E 37.5 FT LOT 2 BLK 5 |
| Legal Subdivision | NASON ADD |
| Legal Block | 5 |
| Legal Lot Number | 2 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 307102 |
613 W 12th St is owned and occupied by two individuals who bought it in May 2025.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 613 W 12TH ST, ANTIOCH, CA 94509-2263 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants in Common |
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 | May 15, 2025 · Amount on File |
| Deed Sale | May 15, 2025 · Amount on File |
| Prior Sale | Sep 12, 2024 · Amount on File |
| Deed Document Number | 202548452 |
| Prior Transfer Date | Sep 5, 2024 |
| Prior Transfer Doc | 0000090182 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 613 W 12TH ST, ANTIOCH, CA 94509-2263 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Name | Verified Name |
|---|---|
| Address | 613 W 12TH ST, ANTIOCH, CA 94509-2263 |
| Document Number | 0000250851 |
|---|---|
| Date | Sep 8, 2021 |
| Instrument | 2021-250851 |
| Name | I-IOMEIAP INVESTMENT PARTNERS III SPVLLC |
|---|---|
| Type | Non-Lending Institution |
| Address | BOSTON, MA 02199 |
| Amount | Amount on Record |
|---|
The 2025 property tax bill for 613 W 12th St was $5,321.
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 | $474,300 (+11.6%) Land $229,500 Building $244,800 | |
| 2025 | $5,321.00 | $425,000 Land $232,000 Building $193,000 |
| 2023 | $2,307.00 (+39.4%) Homeowner's exemption | $112,229 Land $49,207 Building $63,022 |
| 2022 | $1,655.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 613 W 12th St in Zone X, an area of minimal flood risk.
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.
The area around 613 W 12th St 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 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, Verizon.
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