Contra Costa County property record for 233 Boulder Dr, Antioch, CA 94509 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,877 sqft · built 1967 |
| Lot Size | 0.231 acres (10,080 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $300,000 (Mar 2015) |
| Tax Bill | $4,605 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 072-041-019 |
| Primary APN | 072-041-019 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,877 sqft Living Area |
| 1st Floor Area | 1,877 sqft |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1967 |
| Lot Area | 10,080 sqft (0.231 acres) |
| Garage Type | Attached |
| Garage Area | 457 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 233 BOULDER DR |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-6205 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 3596 LOT 49 & POR 48 EX MR |
| Legal Subdivision | RIDGEROCK PARK |
| Legal Tract | 3596 |
| Legal Lot Number | 49 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 355109 |
Source: Contra Costa County records · APN 072-041-019
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 | 233 BOULDER DR, ANTIOCH, CA 94509-6205 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 02, 2015 · Amount on Record |
| Deed Sale | Mar 02, 2015 · Amount on Record |
| Deed Document Number | 201535375 |
| Prior Transfer Date | Feb 06, 2013 |
| Prior Transfer Doc | 0000047313 |
| Record Updated | 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 is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $367,754 (+2%) Land $85,806 Building $281,948 | |
| 2025 | $4,605.00 (+5.31%) | $360,544 (+4.04%) Land $84,124 Building $276,420 |
| 2023 | $4,373.00 (+1.56%) | $346,545 Land $80,858 Building $265,687 |
| 2022 | $4,306.00 |
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 | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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 645 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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