Contra Costa County property record for 4648 Winchester Dr, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 2,590 sqft · built 2002 |
| Lot Size | 0.154 acres (6,699 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $7,452 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 034-350-013-8 |
| Primary APN | 034-350-013-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,590 sqft Living Area |
| 1st Floor Area | 2,590 sqft |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Lot Area | 6,699 sqft (0.154 acres) |
| Garage Type | Attached |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4648 WINCHESTER DR |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-6349 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | P-1 |
| Legal Description | T7658 L13 |
| Legal Subdivision | SUBDIVISION 7658 |
| Legal Tract | 7658 |
| Legal Lot Number | 13 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 302014 |
4648 Winchester Dr is held in a trust since May 2024.
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 4648 WINCHESTER DR, OAKLEY, CA 94561-6349 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 20, 2002 |
| Deed Sale | Dec 20, 2002 |
| Deed Document Number | 2002487564 |
| Last Transfer Date | May 23, 2024 |
| Transfer Doc | 0000050621 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4648 Winchester Dr was $7,452.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Oakley City |
| Secondary School District | Liberty Union High School District (09 - 12) |
| Elementary School District | Oakley Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $510,971 (+2%) Land $132,944 Building $378,027 | |
| 2025 | $7,452.00 | $500,953 Land $130,338 Building $370,615 |
| 2023 | $7,151.00 (+1.13%) Homeowner's exemption | $481,503 Land $125,278 Building $356,225 |
| 2022 | $7,071.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4648 Winchester Dr in Zone X, an area of minimal flood risk.
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 |
| Nearby Flood Policies | 2 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.
The area around 4648 Winchester Dr 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 | DIABLO WATER DISTRICT serves 47,158 people · EPA ID CA0710007 |
|---|---|
| Water Source | Purchased surface water from RANDALL-BOLD WATER TREATMENT PLANT |
| Last State Inspection | Jan 2024 |
| Also Mapped Here | CONTRA COSTA WATER DISTRICT |
| Lead | 2 ppb (2020–2022) 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 542 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 |
| AT&T DSL | 100 / 20 |
May also be available: Verizon.
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