Contra Costa County property record for 804 O St, Antioch, CA 94509 · Last verified July 2026
| Property Type | Residential > Multi-Unit > Quadplex |
|---|---|
| Architecture Style | Quadruplex |
| Year Built | Built 1971 |
| Square Footage | 3,398 sqft Living Area |
| Lot Size | 4,242 sqft (0.097 acres) |
| Last Sale | $675,000 (2004) |
| Tax Bill | $5,449.00 (2025) |
| Primary APN | 074-130-086-7 |
|---|---|
| Alternative APN |
|
| Total Rooms | 4 Rooms |
|---|---|
| Building Area | 3,398 sqft Living Area |
| 1st Floor | 3,398 sqft 1st Floor |
| Stories | 1 Stories |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1971 |
| Architectural Style | Quadruplex Style |
| Lot Area | 4,242 sqft (0.097 acres) |
| Street Address | 804 O ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-1050 |
| Property Usage | Residential Property Usage |
| Type | Residential > Multi-Unit > Quadplex |
| Legal Description | POR RO LOS MEDANOS |
| Legal Subdivision | RO LOS MEDANOS |
| Jurisdiction | CONTRA COSTA CA |
| Minor Civil Division | ANTIOCH-PITTSBURG |
| Census Blockgroup | 5 |
| Census Block | 5008 |
| Census Tract | 305000 |
Source: Contra Costa County records · APN 074-130-086-7
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 44 TARAVAL ST, SAN FRANCISCO, CA 94116-1931 |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Tenants In Common |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 14, 2004 · Amount on Record |
| Deed Sale | Dec 14, 2004 · Amount on Record |
| Prior Sale | Dec 30, 2003 · Amount on Record |
| Deed Doc Number | 2004478604 |
| Prior Transfer Date | Jul 10, 2002 |
| Prior Transfer Doc | 0000377574 |
| Record Refreshed | Sep 20, 2026 |
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 and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $294,978 (+2%) Land $85,224 Building $209,754 | |
| 2025 | $5,449.00 (+7.79%) | $289,195 (+4.04%) Land $83,553 Building $205,642 |
| 2023 | $5,055.00 (+1.08%) | $277,966 Land $80,309 Building $197,657 |
| 2022 | $5,001.00 |
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