Contra Costa County property record for 1817 Mount Silliman Way, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,710 sqft · built 1992 |
| Lot Size | 0.103 acres (4,500 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $80,000 (Apr 1999) |
| Tax Bill | $4,014 (2025) |
| Deeds & Mortgages | Aug 2018 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 055-040-020-4 |
| Primary APN | 055-040-020-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,710 sqft Living Area |
| 1st Floor Area | 944 sqft |
| 2nd Floor Area | 766 sqft |
| Year Built | Built 1992 |
|---|---|
| Effective Year Built | Effective 1992 |
| Lot Area | 4,500 sqft (0.103 acres) |
| Garage Type | Attached |
| Garage Area | 448 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 1817 MOUNT SILLIMAN WAY |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-8805 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7554 L94 |
| Legal Subdivision | SUBDIVISION 7554 |
| Legal Tract | 7554 |
| Legal Lot Number | 94 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 355120 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 1817 MOUNT SILLIMAN WAY, ANTIOCH, CA 94531-8805 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 29, 1999 · Amount on Record |
| Deed Sale | Apr 29, 1999 · Amount on Record |
| Deed Document Number | 1999115072 |
| Last Transfer Date | Aug 24, 2001 |
| Transfer Doc | 0000262966 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 1817 MOUNT SILLIMAN WAY, ANTIOCH, CA 94531-8805 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000136147 |
|---|---|
| Date | Aug 24, 2018 |
| Instrument | 2018-136147 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57104 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Sep 1, 2048 |
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 | $336,919 (+2%) Land $90,171 Building $246,748 | |
| 2025 | $4,014.00 (+6.59%) Homeowner's exemption | $330,313 (+4.04%) Land $88,403 Building $241,910 |
| 2023 | $3,766.00 (+1.54%) Homeowner's exemption | $317,488 Land $84,971 Building $232,517 |
| 2022 | $3,709.00 |
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 753 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: Verizon.
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