Contra Costa County property record for 4525 Bison Way, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,706 sqft · built 1999 |
| Lot Size | 0.146 acres (6,360 sqft) |
| Owner | Trust Name on File |
| Last Sale | $252,500 (Oct 1999) |
| Tax Bill | $4,728 (2025) |
| Deeds & Mortgages | Aug 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 053-560-026-6 |
| Primary APN | 053-560-026-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,706 sqft Living Area |
| 1st Floor Area | 1,473 sqft |
| 2nd Floor Area | 1,233 sqft |
| Year Built | Built 1999 |
|---|---|
| Effective Year Built | Effective 1999 |
| Lot Area | 6,360 sqft (0.146 acres) |
| Garage Type | Attached |
| Garage Area | 630 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4525 BISON WAY |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-7467 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7285 L744 |
| Legal Subdivision | SUBDIVISION 7285 |
| Legal Tract | 7285 |
| Legal Lot Number | 744 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 355111 |
4525 Bison Way is held in a trust since March 2005.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 10823 TOPBRANCH LN, COLUMBIA, MD 21044-3683 |
| Owner Type | Company |
| Vesting | Trust |
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 | Oct 1, 1999 · Amount on File |
| Deed Sale | Oct 1, 1999 · Amount on File |
| Deed Document Number | 1999261821 |
| Last Transfer Date | Mar 8, 2005 |
| Transfer Doc | 0000164247 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 4525 BISON WAY, ANTIOCH, CA 94531-7467 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | STATES TITLE INC |
| Name | Verified Name |
|---|
| Document Number | 0000178407 |
|---|---|
| Date | Aug 21, 2020 |
| Instrument | 2020-178407 |
| Name | SIERRA PACIFIC MORTGAGE CO INC |
|---|---|
| Type | Mortgage Company |
| Address | FOLSOM, CA 95630 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 181 Months |
| Due | Sep 1, 2035 |
The 2025 property tax bill for 4525 Bison Way was $4,728.
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 | $398,021 (+2%) Land $78,374 Building $319,647 | |
| 2025 | $4,728.00 | $390,218 Land $76,838 Building $313,380 |
| 2023 | $4,374.00 (+1.58%) Homeowner's exemption | $375,067 Land $73,855 Building $301,212 |
| 2022 | $4,306.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4525 Bison Way in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2010.
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 Claims | 1 (2010) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Mar 2010 · other causes |
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 4525 Bison Way 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 536 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 Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
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