Contra Costa County property record for 121 Ridgerock Dr, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,362 sqft · built 1966 |
| Lot Size | 0.161 acres (7,020 sqft) |
| Owner | Individual Name on Record |
| Tax Bill | $1,706 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 072-021-006-1 |
| Primary APN | 072-021-006-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,362 sqft Living Area |
| 1st Floor Area | 1,362 sqft |
| Year Built | Built 1966 |
|---|---|
| Effective Year Built | Effective 1967 |
| Lot Area | 7,020 sqft (0.161 acres) |
| Garage Type | Attached |
| Garage Area | 437 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 121 RIDGEROCK DR |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-6224 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | TRACT 3435 LOT 6 EX MR |
| Legal Tract | 3435 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 355109 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 121 RIDGEROCK DR, ANTIOCH, CA 94509-6224 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 5, 1995 |
| Deed Sale | Oct 5, 1995 |
| Deed Document Number | 1995169087 |
| Last Transfer Date | Jun 19, 2013 |
| Transfer Doc | 0000173429 |
| Record Updated | Sep 20, 2026 |
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 | $103,099 (+2%) Land $32,999 Building $70,100 | |
| 2025 | $1,706.00 (+7.03%) | $101,078 (+4.04%) Land $32,352 Building $68,726 |
| 2023 | $1,594.00 (+1.14%) | $97,155 Land $31,097 Building $66,058 |
| 2022 | $1,576.00 |
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 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 376 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 DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
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