Contra Costa County property record for 3109 Windsor Dr, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,402 sqft · built 1958 |
| Lot Size | 0.207 acres (9,000 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $292,000 (Jan 2015) |
| Tax Bill | $4,498 (2025) |
| Deeds & Mortgages | Jul 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 068-292-014-5 |
| Primary APN | 068-292-014-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,402 sqft Living Area |
| 1st Floor Area | 1,402 sqft |
| Year Built | Built 1958 |
|---|---|
| Effective Year Built | Effective 1959 |
| Lot Area | 9,000 sqft (0.207 acres) |
| Garage Type | Attached |
| Garage Area | 520 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 3109 WINDSOR DR |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-5052 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | TRACT 2445 LOT 50 |
| Legal Subdivision | 2445 WINDSOR HILLS |
| Legal Tract | 2445 |
| Legal Lot Number | 50 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 308001 |
Source: Contra Costa County records, 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 | 2 Individual Names on Record |
|---|---|
| Mailing Address | 3109 WINDSOR DR, ANTIOCH, CA 94509-5052 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jan 30, 2015 · Amount on Record |
| Deed Sale | Jan 30, 2015 · Amount on Record |
| Deed Document Number | 201516662 |
| Prior Transfer Date | Sep 14, 2005 |
| Prior Transfer Doc | 0000356803 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 3109 WINDSOR DR, ANTIOCH, CA 94509-5052 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | TIMIOS INC |
| Name | Verified Name |
|---|
| Document Number | 0000138652 |
|---|---|
| Date | Jul 13, 2020 |
| Instrument | 2020-138652 |
| Name | ROYAL UNITED MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | INDIANAPOLIS, IN 46250 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Aug 1, 2050 |
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 | $357,945 (+2%) Land $106,890 Building $251,055 | |
| 2025 | $4,498.00 (+5.31%) | $350,928 (+4.04%) Land $104,795 Building $246,133 |
| 2023 | $4,271.00 (+1.55%) | $337,303 Land $100,727 Building $236,576 |
| 2022 | $4,206.00 |
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 |
|---|
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 613 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
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