Contra Costa County property record for 100 E 18th St, Antioch, CA 94509
| Property Type | Commercial Office |
|---|---|
| Details | 936 sqft · built 1963 |
| Lot Size | 0.148 acres (6,447 sqft) |
| Owner | Trust Name on File |
| Last Sale | $105,000 (Dec 2013) |
| Tax Bill | $2,482 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 068-041-032-1 |
| Primary APN | 068-041-032-1 |
|---|---|
| Alternative APNs |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 1 Story |
| Building Area | 936 sqft Gross Area |
| 1st Floor Area | 936 sqft |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1963 |
| Lot Area | 6,447 sqft (0.148 acres) |
| Street Address | 100 E 18TH ST |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94509-2429 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | POR SEC 19 T2N R2E & POR ADJ TR |
| Legal Range | 02E |
| Legal Township | 02N |
| Legal Section | 19 |
| Legal Subdivision | MOUNTAIN VIEW SUBDIVISION |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 306003 |
100 E 18th St, a commercial property, is held in a trust since December 2013.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 501 RAILROAD AVE, PITTSBURG, CA 94565-2304 |
| Owner Type | Company |
| Vesting | Trust |
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 |
|---|---|
| Last Sale | Dec 31, 2013 · Amount on File |
| Deed Sale | Dec 31, 2013 · Amount on File |
| Prior Sale | Sep 30, 2011 · Amount on File |
| Deed Document Number | 2013297300 |
| Prior Transfer Date | Aug 19, 2011 |
| Prior Transfer Doc | 0000173516 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 100 E 18th St was $2,482.
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 | $131,276 (+2%) Land $62,513 Building $68,763 | |
| 2025 | $2,482.00 | $128,703 Land $61,288 Building $67,415 |
| 2023 | $2,284.00 (+1.06%) | $123,708 Land $58,909 Building $64,799 |
| 2022 | $2,260.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 100 E 18th St 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.
The area around 100 E 18th St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 741 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: Verizon.
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