Contra Costa County property record for 20 Mt Alpine Pl, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 2,041 sqft · built 1971 |
| Lot Size | 0.25 acres (10,878 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $2,683 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-152-015-2 |
| Primary APN | 119-152-015-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,041 sqft Living Area |
| 1st Floor Area | 2,041 sqft |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1971 |
| Architectural Style | Cluster |
| Lot Area | 10,878 sqft (0.25 acres) |
| Garage Type | Attached |
| Garage Area | 451 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 20 MT ALPINE PL |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1501 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 3576 LOT 22 EX MR |
| Legal Subdivision | DANA HILLS SUBDIVISION 3576 |
| Legal Tract | 3576 |
| Legal Lot Number | 22 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4004 |
| Census Tract | 355306 |
20 Mt Alpine Pl is owner-occupied and held in a trust since September 2009.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 20 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| 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 | Sep 3, 2009 |
| Transfer Doc | 0000213333 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 20 Mt Alpine Pl was $2,683 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 | $136,249 (+2%) Land $42,874 Building $93,375 | |
| 2025 | $2,683.00 Homeowner's exemption | $133,579 Land $42,034 Building $91,545 |
| 2023 | $2,588.00 (+2.58%) Homeowner's exemption | $128,393 Land $40,402 Building $87,991 |
| 2022 | $2,523.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 20 Mt Alpine Pl 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 20 Mt Alpine Pl is moderate, ranking above 64% 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 64% of the US · lower than 60% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect 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 | 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 420 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 |
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