Contra Costa County property record for 4031 Boulder Dr, Antioch, CA 94509
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,866 sqft · built 1978 |
| Lot Size | 0.238 acres (10,370 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $2,267 (2025) |
| Deeds & Mortgages | Jun 2017 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 072-103-003-9 |
| Primary APN | 072-103-003-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,866 sqft Living Area |
| 1st Floor Area | 1,866 sqft |
| Year Built | Built 1978 |
|---|---|
| Effective Year Built | Effective 1978 |
| Lot Area | 10,370 sqft (0.238 acres) |
| Garage Type | Attached |
| Garage Area | 441 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4031 BOULDER DR |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-6234 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | TRACT 4693 LOT 180 EX 1/4 MR |
| Legal Subdivision | SUBDIVISION 4693 |
| Legal Tract | 4693 |
| Legal Lot Number | 180 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 1 |
| Census Block | 1011 |
| 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 | Company Name on Record |
|---|---|
| Mailing Address | 4031 BOULDER DR, ANTIOCH, CA 94509-6234 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Feb 9, 2016 |
| Transfer Doc | 0000028827 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 4031 BOULDER DR, ANTIOCH, CA 94509-6234 |
| Document Number | 0000119603 |
| Instrument Date | Jun 26, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Aug 23, 2018 |
| Title Company | TITLE SERVICE AND LIAISON COMPANIES, INDECOMM GLOBAL SVCS |
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 4031 BOULDER DR ANTIOCH CA 945096234, ANTIOCH, CA 94509-6234 |
| Document Number | 0000119603 |
|---|---|
| Date | Jul 5, 2017 |
| Instrument | 119603 |
| Name | BANK OF AMERICA |
|---|---|
| Type | Bank |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Rate Type | Adjustable Rate |
|---|
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 | $161,433 (+2%) Land $36,932 Building $124,501 | |
| 2025 | $2,267.00 (+6.48%) Homeowner's exemption | $158,268 (+4.04%) Land $36,208 Building $122,060 |
| 2023 | $2,129.00 (+1.43%) Homeowner's exemption | $152,124 Land $34,803 Building $117,321 |
| 2022 | $2,099.00 |
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 645 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 | 100 / 20 |
May also be available: Verizon.
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