Contra Costa County property record for 5423 Geronimo Ct, Antioch, CA 94531 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,438 sqft · built 1998 |
| Lot Size | 0.431 acres (18,774 sqft) |
| Owner | Individual Name on File |
| Last Sale | $318,000 (May 2012) |
| Tax Bill | $4,908 (2025) |
| Deeds & Mortgages | Aug 2017 Mortgage Feb 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 055-450-021-5 |
| Primary APN | 055-450-021-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 3,438 sqft Living Area |
| 1st Floor Area | 1,700 sqft |
| 2nd Floor Area | 1,738 sqft |
| Year Built | Built 1998 |
|---|---|
| Effective Year Built | Effective 1999 |
| Lot Area | 18,774 sqft (0.431 acres) |
| Garage Type | Attached |
| Garage Area | 699 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 5423 GERONIMO CT |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-9030 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8122 L375 |
| Legal Subdivision | SUBDIVISION 8122 |
| Legal Tract | 8122 |
| Legal Lot Number | 375 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 303207 |
Source: Contra Costa County records · APN 055-450-021-5
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 5423 GERONIMO CT, ANTIOCH, CA 94531-9030 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Aug 10, 2017 | Intrafamily Transfer, Transfer · Conventional Mortgage ALAMEDA MORTGAGE CORP |
| Feb 09, 2017 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | May 03, 2012 · Amount on Record |
| Deed Sale | May 03, 2012 · Amount on Record |
| Prior Sale | Oct 28, 2011 · Amount on Record |
| Deed Document Number | 2012103384 |
| Last Transfer Date | Aug 04, 2017 |
| Transfer Doc | 0000144094 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Aug 10, 2017 |
| Property Address | 5423 GERONIMO CT, ANTIOCH, CA 94531-9030 |
| Document Number | 0000144094 |
| Map Reference | MB400 PG31 |
| Instrument Date | Aug 04, 2017 |
| Instrument | 2017-144094 |
| Transaction Type | Transfer |
| Record Updated | Nov 03, 2022 |
| Title Company | CHICAGO TITLE COMPANY |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 5423 GERONIMO CT, ANTIOCH, CA 94531-9030 |
| Document Number | 0000144095 |
|---|---|
| Date | Aug 10, 2017 |
| Instrument | 2017-144095 |
| Name | ALAMEDA MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Sep 01, 2047 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Feb 09, 2017 |
| Property Address | 5423 GERONIMO CT, ANTIOCH, CA 94531-9030 |
| Document Number | 0000025614 |
| Instrument Date | Oct 05, 2016 |
| Instrument | 25614 |
| Transaction Type | Transfer |
| Record Updated | Feb 20, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Separate Estate/Property |
| Address | 5423 GERONIMO CT ANTIOCH CA 945319030, ANTIOCH, CA 94531-9030 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Antioch City |
| Unified School District | Antioch Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $407,399 (+2%) Land $51,239 Building $356,160 | |
| 2025 | $4,908.00 (+6.21%) | $399,412 (+4.04%) Land $50,235 Building $349,177 |
| 2023 | $4,621.00 (+1.52%) | $383,904 Land $48,285 Building $335,619 |
| 2022 | $4,552.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | High above 76% of the US · above 53% of California |
|---|---|
| Wildfire Likelihood | About 1 in 219 per year |
| Exposure | Direct burnable vegetation at the parcel |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 530 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Verizon | Fixed Wireless | 300 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: T-Mobile USA, Unwired, AT&T. Availability varies by address; speeds are provider-advertised maximums, not measured.
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