Contra Costa County property record for 5104 Aubrey Ct, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,560 sqft · built 2004 |
| Lot Size | 0.172 acres (7,474 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $810,000 (Apr 2022) |
| Tax Bill | $7,978 (2025) |
| Deeds & Mortgages | Apr 2022 Sale & Mortgage Oct 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-240-035-8 |
| Primary APN | 056-240-035-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 13 Rooms |
| Stories | 2 Stories |
| Building Area | 2,560 sqft Living Area |
| 1st Floor Area | 1,341 sqft |
| 2nd Floor Area | 1,219 sqft |
| Year Built | Built 2004 |
|---|---|
| Effective Year Built | Effective 2004 |
| Lot Area | 7,474 sqft (0.172 acres) |
| Garage Type | Attached |
| Garage Area | 597 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 5104 AUBREY CT |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-8589 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8565 L2 |
| Legal Subdivision | SUBDIVISION 8565 |
| Legal Tract | 8565 |
| Legal Lot Number | 2 |
| 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.
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 | 5104 AUBREY CT, ANTIOCH, CA 94531-8589 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Apr 14, 2022 | Grant Deed, Transfer · Conventional Mortgage CORNERSTONE HOME LENDING INC |
| Oct 20, 2020 | Intrafamily Transfer, Transfer · Conventional Mortgage MASON MCDUFFIE MORTGAGE CORP |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 14, 2022 · Amount on Record |
| Deed Sale | Apr 14, 2022 · Amount on Record |
| Prior Sale | Aug 26, 2011 · Amount on Record |
| Deed Document Number | 202264906 |
| Prior Transfer Date | Oct 9, 2020 |
| Prior Transfer Doc | 0000243218 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Apr 14, 2022 |
| Property Address | 5104 AUBREY CT, ANTIOCH, CA 94531-8589 |
| Document Number | 0000064906 |
| Map Reference | MB 453 PG 50 |
| Instrument Date | Apr 11, 2022 |
| Instrument | 2022-064906 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 5104 AUBREY CT, ANTIOCH, CA 94531-8589 |
| Document Number | 0000064907 |
|---|---|
| Date | Apr 14, 2022 |
| Instrument | 2022-064907 |
| Name | CORNERSTONE HOME LENDING INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 1, 2052 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Oct 20, 2020 |
| Property Address | 5104 AUBREY CT, ANTIOCH, CA 94531-8589 |
| Document Number | 0000243218 |
| Map Reference | MB 455 PG 50 |
| Instrument Date | Oct 9, 2020 |
| Instrument | 2020-243218 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 5104 AUBREY CT, ANTIOCH, CA 94531-8589 |
| Document Number | 0000243219 |
|---|---|
| Date | Oct 20, 2020 |
| Instrument | 2020-243219 |
| Name | MASON MCDUFFIE MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 301 Months |
| Due | Nov 1, 2045 |
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 | $731,000 (+3.69%) Land $234,642 Building $496,358 | |
| 2025 | $7,978.00 (+8.72%) | $705,000 (+6.82%) Land $226,297 Building $478,703 |
| 2023 | $7,338.00 (+87.1%) | $660,000 Land $212,000 Building $448,000 |
| 2022 | $3,922.00 |
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 | Low lower than 65% of the US · lower than 79% of California |
|---|---|
| Wildfire Likelihood | 0.05% 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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