Contra Costa County property record for 4912 Opal Way, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,485 sqft · built 1995 |
| Lot Size | 0.071 acres (3,092 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $395,000 (May 2007) |
| Tax Bill | $6,219 (2025) |
| Deeds & Mortgages | Dec 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-110-124-7 |
| Primary APN | 056-110-124-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,485 sqft Living Area |
| 1st Floor Area | 709 sqft |
| 2nd Floor Area | 776 sqft |
| Year Built | Built 1995 |
|---|---|
| Effective Year Built | Effective 1995 |
| Lot Area | 3,092 sqft (0.071 acres) |
| Garage Type | Attached |
| Garage Area | 463 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 4912 OPAL WAY |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-8184 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7125, POR L 453 |
| Legal Subdivision | SUBDIVISION 7125 |
| Legal Tract | 7125 |
| Legal Lot Number | 453 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1021 |
| Census Tract | 302009 |
4912 Opal Way is owned and occupied by two individuals who bought it in May 2007.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4912 OPAL WAY, ANTIOCH, CA 94531-8184 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 30, 2007 · Amount on File |
| Deed Sale | May 30, 2007 · Amount on File |
| Prior Sale | May 30, 2007 · Amount on File |
| Deed Document Number | 2007157145 |
| Prior Transfer Date | Jan 4, 2006 |
| Prior Transfer Doc | 0000010073 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 4912 OPAL WAY, ANTIOCH, CA 94531-8184 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIRST AMER TTL CO RES DIV |
| Name | Verified Name |
|---|---|
| Address | 4912 OPAL WAY, ANTIOCH, CA 94531-8184 |
| Document Number | 0000328385 |
|---|---|
| Date | Dec 29, 2020 |
| Instrument | 2020-328385 |
| Name | MASON MCDUFFIE MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Address | LAKEWOOD, NJ 08701 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 181 Months |
| Due | Jan 1, 2036 |
The 2025 property tax bill for 4912 Opal Way was $6,219 with a homeowner's 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 | $539,786 (+2%) Land $225,479 Building $314,307 | |
| 2025 | $6,219.00 Homeowner's exemption | $529,203 Land $221,058 Building $308,145 |
| 2023 | $5,861.00 (+1.59%) Homeowner's exemption | $508,655 Land $212,475 Building $296,180 |
| 2022 | $5,769.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4912 Opal Way in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 1 in force |
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.
Wildfire risk around 4912 Opal Way is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 611 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
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