Contra Costa County property record for 166 Mount Vernon Dr, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.5 ba · 2,730 sqft · built 1976 |
| Lot Size | 0.275 acres (11,990 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $8,082 (2025) |
| Deeds & Mortgages | Aug 2017 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-391-002-1 |
| Primary APN | 119-391-002-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 2,730 sqft Living Area |
| 1st Floor Area | 2,730 sqft |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1982 |
| Lot Area | 11,990 sqft (0.275 acres) |
| Garage Type | Attached |
| Garage Area | 426 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 166 MT VERNON DR |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1312 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R12 |
| Legal Description | T04654 L0002 B |
| Legal Subdivision | SUBDIVISION 4654 |
| Legal Tract | 04654 |
| Legal Lot Number | 2 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 355306 |
166 Mount Vernon Dr is owner-occupied and held in a trust since December 2010.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 166 MT VERNON DR, CLAYTON, CA 94517-1312 |
| Occupancy | Owner Occupied |
| 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 Transfer Date | Dec 10, 2010 |
| Transfer Doc | 0000009076 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 166 MT VERNON DR, CLAYTON, CA 94517-1312 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIRST AMERICAN TITLE OFS |
| Name | Verified Name |
|---|
| Document Number | 0000142872 |
|---|---|
| Date | Aug 8, 2017 |
| Instrument | 2017-142872 |
| Name | FREMONT BANK |
|---|---|
| Type | Bank |
| Address | LIVERMORE, CA 94551 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Aug 1, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 166 Mount Vernon Dr was $8,082 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Clayton City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $635,575 (+2%) Land $200,002 Building $435,573 | |
| 2025 | $8,082.00 Homeowner's exemption | $623,114 Land $196,081 Building $427,033 |
| 2023 | $7,789.00 (+1.43%) Homeowner's exemption | $598,919 Land $188,468 Building $410,451 |
| 2022 | $7,679.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 166 Mount Vernon Dr in Zone X, an area of minimal flood risk.
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 Policies | 4 in force |
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.
Wildfire risk around 166 Mount Vernon Dr is moderate, ranking above 60% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 60% of the US · lower than 64% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 351 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 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, AT&T.
5G (outdoors only) and 4G LTE
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