Contra Costa County property record for 21 Mt Alpine Pl, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,128 sqft · built 1971 |
| Lot Size | 0.215 acres (9,350 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $825,000 (Jun 2019) |
| Tax Bill | $12,506 (2025) |
| Deeds & Mortgages | Dec 2019 Mortgage May 2020 Mortgage + 3 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-152-022-8 |
| Primary APN | 119-152-022-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,128 sqft Living Area |
| Gross Area | 2,716 sqft |
| 1st Floor Area | 2,039 sqft |
| Basement Area | 89 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1981 |
| Architectural Style | Cluster |
| Exterior Material | Stucco |
| Roof Material | Wood Shingle |
| Lot Area | 9,350 sqft (0.215 acres) |
| Garage Type | Attached |
| Garage Area | 588 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 21 MT ALPINE PL |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1501 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 3576 LOT 29 EX MR |
| Legal Subdivision | SUBDIVISION 3576 |
| Legal Tract | 3576 |
| Legal Lot Number | 29 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4004 |
| Census Tract | 355306 |
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 Individual Names on File |
|---|---|
| Mailing Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Date | Document |
|---|---|
| Dec 2, 2019 | Deed of Trust, Mortgage · Conventional Mortgage COMMERCE HOME MORTGAGE LLC |
| May 4, 2020 | Deed of Trust, Mortgage · Conventional Mortgage COMMERCE HOME MORTGAGE LLC |
| May 16, 2022 | Deed of Trust, Mortgage · Line of Credit FARMERS & MERCHANTS BANK OF CENTRAL CA |
| Jun 4, 2019 | Grant Deed, Transfer · Conventional Mortgage COMMERCE MORTGAGE |
| Sep 6, 2018 | Deed of Trust, Mortgage · Line of Credit BANK OF AMERICA |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 4, 2019 · Amount on File |
| Deed Sale | Jun 4, 2019 · Amount on File |
| Prior Sale | Jan 4, 2012 · Amount on File |
| Deed Document Number | 201982594 |
| Prior Transfer Date | Dec 6, 1996 |
| Prior Transfer Doc | 0000232821 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000215099 |
|---|---|
| Date | Dec 2, 2019 |
| Instrument | 2019-215099 |
| Name | COMMERCE HOME MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | SAN RAMON, CA 94583 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Dec 1, 2049 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | OLD REPUBLIC TTL CO BERKELEY |
| Name | Verified Name |
|---|
| Document Number | 0000084013 |
|---|---|
| Date | May 4, 2020 |
| Instrument | 2020-084013 |
| Name | COMMERCE HOME MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92606 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | May 1, 2050 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | ACCOMMODATION |
| Name | Verified Name |
|---|---|
| Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Document Number | 0000083692 |
|---|---|
| Date | May 16, 2022 |
| Instrument | 2022-083692 |
| Name | FARMERS & MERCHANTS BANK OF CENTRAL CA |
|---|---|
| Type | Bank |
| Address | LODI, CA 95241 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jun 4, 2019 |
| Property Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Document Number | 0000082594 |
| Map Reference | MB 129 PG 26 |
| Instrument Date | May 30, 2019 |
| Instrument | 2019-082594 |
| Transaction Type | Transfer |
| Record Updated | Jul 27, 2021 |
| Title Company | FIDELITY NATIONAL TITLE CO |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 21 MOUNTAIN ALPINE PLACE, CLAYTON, CA 94517 |
| Document Number | 0000082595 |
|---|---|
| Date | Jun 4, 2019 |
| Instrument | 2019-082595 |
| Name | COMMERCE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jul 1, 2049 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 21 MT ALPINE PL, CLAYTON, CA 94517-1501 |
| Document Number | 0000149594 |
| Instrument Date | Sep 6, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Sep 28, 2018 |
| Title Company | AMERICAN TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 21 MT ALPINE PL CLAYTON CA 945171501, CLAYTON, CA 94517-1501 |
| Document Number | 0000149594 |
|---|---|
| Date | Sep 19, 2018 |
| Instrument | 149594 |
| Name | BANK OF AMERICA |
|---|---|
| Type | Bank |
| Address | TAMPA, FL 33634 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|
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 | $1,038,255 (+2%) Land $512,020 Building $526,235 | |
| 2025 | $12,506.00 (+14.2%) Homeowner's exemption | $1,017,898 (+15.07%) Land $501,981 Building $515,917 |
| 2023 | $10,951.00 (+1.28%) Homeowner's exemption | $884,564 Land $482,490 Building $402,074 |
| 2022 | $10,813.00 |
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 | 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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