Contra Costa County property record for 4820 Massive Peak Way, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 3,275 sqft · built 1992 |
| Lot Size | 0.15 acres (6,552 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $5,929 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 072-330-116-4 |
| Primary APN | 072-330-116-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 3,275 sqft Living Area |
| 1st Floor Area | 1,603 sqft |
| 2nd Floor Area | 1,672 sqft |
| Year Built | Built 1992 |
|---|---|
| Effective Year Built | Effective 1995 |
| Lot Area | 6,552 sqft (0.15 acres) |
| Garage Type | Attached |
| Garage Area | 660 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 4820 MASSIVE PEAK WAY |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-8310 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7317 L116 |
| Legal Tract | 7317 |
| Legal Lot Number | 116 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2000 |
| 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 | 4820 MASSIVE PEAK WAY, ANTIOCH, CA 94531-8310 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Sep 6, 2005 |
| Transfer Doc | 0000389155 |
| 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 | $526,611 (+2%) Land $77,794 Building $448,817 | |
| 2025 | $5,929.00 (+6.29%) Homeowner's exemption | $516,286 (+4.04%) Land $76,269 Building $440,017 |
| 2023 | $5,578.00 (+1.62%) Homeowner's exemption | $496,240 Land $73,308 Building $422,932 |
| 2022 | $5,489.00 |
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 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; 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 | 0.02% 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 484 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, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: T-Mobile, Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures