Contra Costa County property record for 3700 Sunset Ln, Antioch, CA 94509
| Property Type | Medical Building |
|---|---|
| Details | 11,040 sqft · built 1983 |
| Lot Size | 0.51 acres (22,216 sqft) |
| Owner | Company Name on File |
| Tax Bill | $22,753 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 068-361-010-9 |
| Primary APN | 068-361-010-9 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 11,040 sqft Gross Area |
| 1st Floor Area | 11,040 sqft |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1984 |
| Lot Area | 22,216 sqft (0.51 acres) |
| Street Address | 3700 SUNSET LN |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-6199 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Medical Building |
| Legal Description | T06343 L0006 B EX 1/2 MR |
| Legal Tract | 06343 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 4 |
| Census Block | 4009 |
| Census Tract | 308001 |
3700 Sunset Ln, a commercial property, is owned by a company.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 3725 LONE TREE WAY, E, ANTIOCH, CA 94509-6012 |
| Owner Type | Company |
| Vesting | Partnership |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 3700 Sunset Ln was $22,753.
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 | $1,706,480 (+2%) Land $98,880 Building $1,607,600 | |
| 2025 | $22,753.00 | $1,673,021 Land $96,942 Building $1,576,079 |
| 2023 | $21,419.00 (+1.47%) | $1,608,058 Land $93,179 Building $1,514,879 |
| 2022 | $21,109.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3700 Sunset Ln in Zone X, an area of minimal flood risk.
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.
Wildfire risk around 3700 Sunset Ln is low, with a 0.01% annual chance of wildfire.
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 489 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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