Contra Costa County property record for 5105 Pioneer Ct, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,533 sqft · built 1993 |
| Lot Size | 0.143 acres (6,245 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $445,000 (Sep 2004) |
| Tax Bill | $7,128 (2025) |
| Deeds & Mortgages | Dec 2020 Mortgage Dec 2018 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-210-034-7 |
| Primary APN | 056-210-034-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 1,533 sqft Living Area |
| 1st Floor Area | 862 sqft |
| 2nd Floor Area | 671 sqft |
| Year Built | Built 1993 |
|---|---|
| Effective Year Built | Effective 1993 |
| Lot Area | 6,245 sqft (0.143 acres) |
| Garage Type | Attached |
| Garage Area | 69 sqft |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 5105 PIONEER CT |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-8467 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | A-2 |
| Legal Description | T7618 L437 |
| Legal Subdivision | SUBDIVISION 7618 |
| Legal Tract | 7618 |
| Legal Lot Number | 437 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 303207 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Shannon-Williamson Ranch listed 1987 · 12 contributing resources · NRIS 87000003 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
5105 Pioneer Ct is owned and occupied by two individuals who bought it in September 2004.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 5105 PIONEER CT, ANTIOCH, CA 94531-8467 |
| 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.
| Date | Document |
|---|---|
| Dec 28, 2020 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE LLC |
| Dec 17, 2018 | Deed of Trust, Mortgage · Conventional Mortgage MONEY SOURCE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 10, 2004 · Amount on File |
| Deed Sale | Sep 10, 2004 · Amount on File |
| Prior Sale | Mar 19, 2003 · Amount on File |
| Deed Document Number | 2004350036 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 5105 PIONEER CT, ANTIOCH, CA 94531-8467 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | PLACER TITLE |
| Name | Verified Name |
|---|---|
| Address | 5105 PIONEER CT, ANTIOCH, CA 94531-8467 |
| Document Number | 0000326177 |
|---|---|
| Date | Dec 28, 2020 |
| Instrument | 2020-326177 |
| Name | UNITED WHOLESALE MORTGAGE LLC |
|---|---|
| Type | Non-Lending Institution |
| Address | PONTIAC, MI 48341 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jan 1, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 5105 PIONEER CT, ANTIOCH, CA 94531-8467 |
| Document Number | 0000204567 |
| Instrument Date | Dec 17, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Jan 4, 2019 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 5105 PIONEER CT ANTIOCH CA 945318467, ANTIOCH, CA 94531-8467 |
| Document Number | 0000204567 |
|---|---|
| Date | Dec 21, 2018 |
| Instrument | 204567 |
| Name | MONEY SOURCE |
|---|---|
| Type | Funding / Finance Company |
| Address | MELVILLE, NY 11747 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Dec 20, 2048 |
The 2025 property tax bill for 5105 Pioneer Ct was $7,128 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 | $633,107 (+2%) Land $227,478 Building $405,629 | |
| 2025 | $7,128.00 Homeowner's exemption | $620,694 Land $223,018 Building $397,676 |
| 2023 | $6,719.00 (+1.63%) Homeowner's exemption | $596,594 Land $214,359 Building $382,235 |
| 2022 | $6,611.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 5105 Pioneer Ct in Zone X, an area of minimal flood risk.
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.
Wildfire risk around 5105 Pioneer Ct is low, with a 0.06% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 62% of the US · lower than 77% of California |
|---|---|
| Wildfire Likelihood | 0.06% annual chance |
| Exposure | Indirect 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 638 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 | 100 / 20 |
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