Contra Costa County property record for 712 I St, Antioch, CA 94509
| Property Type | Apartments (5+ Units) |
|---|---|
| Details | 41,833 sqft · built 2007 |
| Lot Size | 1.73 acres (75,770 sqft) |
| Owner | Company Name on File |
| Last Sale | $264,000 (Nov 2006) |
| Tax Bill | $49,056 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 066-212-013-8 |
| Primary APN | 066-212-013-8 |
|---|---|
| Alternative APN |
|
| Total Rooms | 40 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 41,833 sqft Living Area |
| 1st Floor Area | 41,833 sqft |
| Year Built | Built 2007 |
|---|---|
| Effective Year Built | Effective 2007 |
| Lot Area | 75,770 sqft |
| Street Address | 712 I ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-1582 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Apartments (5+ Units) |
| Legal Description | TN OF ANTIOCH POR BLKS 73,90 & TR ADJ |
| Legal Subdivision | ANTIOCH |
| Legal Block | 73,90 |
| Legal Lot Number | 1,2,9 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 5 |
| Census Block | 5020 |
| Census Tract | 305000 |
712 I St, a residential property, is owned by a company that bought it in November 2006 and is owner-occupied.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 22645 GRAND ST, HAYWARD, CA 94541-5031 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Partnership |
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 | Name on Deed |
|---|---|
| Last Sale | Nov 1, 2006 · Amount on File |
| Deed Sale | Nov 1, 2006 · Amount on File |
| Prior Sale | Nov 30, 2005 · Amount on File |
| Deed Document Number | 2006351806 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 712 I St was $49,056 with an additional exemption.
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 | $6,866,640 (+2%) Land $2,080,800 Building $4,785,840 | |
| 2025 | $49,056.00 Additional exemption filed | $6,732,000 Land $2,040,000 Building $4,692,000 |
| 2023 | $46,468.00 (%) Additional exemption filed | $7,575,080 Land $2,525,024 Building $5,050,056 |
| 2022 | $46,470.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 712 I St in Zone X, an area of minimal flood risk, though there have been 47 flood claims nearby since 1982.
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 |
| 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 I 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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