Contra Costa County property record for 712 O St, Antioch, CA 94509
| Property Type | Apartments (5+ Units) |
|---|---|
| Details | 4,800 sqft · built 1965 |
| Lot Size | 0.19 acres (8,276 sqft) |
| Owner | Company Name on File |
| Last Sale | $4,380,500 (Dec 2014) |
| Tax Bill | $10,099 (2025) |
| Deeds & Mortgages | Jan 2017 Mortgage Apr 2020 Mortgage |
| Flood Zone | Zone AE (high risk) |
| APN | 074-130-053-7 |
| Primary APN | 074-130-053-7 |
|---|---|
| Alternative APN |
|
| Total Rooms | 6 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 4,800 sqft Living Area |
| 1st Floor Area | 4,800 sqft |
| Year Built | Built 1965 |
|---|---|
| Effective Year Built | Effective 1965 |
| Lot Area | 8,276 sqft (0.19 acres) |
| Street Address | 712 O ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-1052 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Apartments (5+ Units) |
| Legal Description | POR RO LOS MEDANOS |
| Legal Subdivision | LOS MEDANOS RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 5 |
| Census Block | 5008 |
| Census Tract | 305000 |
712 O St, a residential property, is owned by a company that bought it in December 2014.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 360 GRAND AVE, OAKLAND, CA 94610-4840 |
| Owner Type | Company |
| Vesting | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Jan 26, 2017 | Deed of Trust, Mortgage · Commercial Mortgage MECHANICS BANK |
| Apr 17, 2020 | Deed of Trust, Mortgage MECHANICS BK |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 18, 2014 · Amount on File |
| Deed Sale | Dec 18, 2014 · Amount on File |
| Deed Document Number | 2014224069 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 712 O ST, ANTIOCH, CA 94509-1052 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | CHICAGO TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000015840 |
|---|---|
| Date | Jan 26, 2017 |
| Instrument | 2017-015840 |
| Name | MECHANICS BANK |
|---|---|
| Type | Bank |
| Address | HERCULES, CA 94547 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 712 O ST, ANTIOCH, CA 94509-1052 |
| Document Number | 0000079287 |
| Instrument Date | Apr 17, 2020 |
| Transaction Type | Mortgage |
| Record Updated | May 12, 2020 |
| Title Company | OLD REPUBLIC TITLE |
| Additional |
|
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 180 GRAND AVE #1405 OAKLAND CA 946123790, 1405, OAKLAND, CA 94612-3790 |
| Document Number | 0000079287 |
|---|---|
| Date | Apr 28, 2020 |
| Instrument | 79287 |
| Name | MECHANICS BK |
|---|---|
| Type | Bank |
| Address | 725 ALFRED NOBEL DR, HERCULES, CA 94547-1806 |
| Amount | Amount on Record |
|---|
| Rate Type | Adjustable Rate |
|---|
The 2025 property tax bill for 712 O St was $10,099.
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 | $619,552 (+2%) Land $294,208 Building $325,344 | |
| 2025 | $10,099.00 | $607,405 Land $288,440 Building $318,965 |
| 2023 | $9,427.00 (+1.2%) | $583,821 Land $277,241 Building $306,580 |
| 2022 | $9,315.00 |
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 712 O St in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 16 policies |
| Nearby Flood Policies | 16 in force |
| Nearby Flood Claims | 47 (1982–2022) |
| Claims Outside the SFHA | 15 of 47 |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
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.
The area around 712 O 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 372 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
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