Contra Costa County property record for 109 Mount Trinity Ct, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,691 sqft · built 1977 |
| Lot Size | 0.391 acres (17,040 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,575,000 (Jul 2023) |
| Tax Bill | $19,076 (2025) |
| Deeds & Mortgages | Jul 2023 Sale & Mortgage Mar 2021 Mortgage + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-520-006-6 |
| Primary APN | 119-520-006-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 2,691 sqft Living Area |
| 1st Floor Area | 1,499 sqft |
| 2nd Floor Area | 1,192 sqft |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | Cluster |
| Lot Area | 17,040 sqft (0.391 acres) |
| Garage Type | Attached |
| Garage Area | 637 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 109 MT TRINITY CT |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1617 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T04018 L0023 B EX MR |
| Legal Subdivision | SUBDIVISION 4018 |
| Legal Tract | 04018 |
| Legal Lot Number | 23 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3011 |
| Census Tract | 355306 |
Source: Contra Costa County records · APN 119-520-006-6
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants in Common |
| Date | Document |
|---|---|
| Jul 17, 2023 | Grant Deed, Transfer · Conventional Mortgage CORNERSTONE FIRST MORTGAGE INC |
| Mar 26, 2021 | Deed of Trust, Mortgage · Conventional Mortgage SIERRA PACIFIC MORTGAGE CO INC |
| Apr 21, 2022 | Grant Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA |
| Mar 22, 2017 | Deed of Trust, Mortgage |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jul 17, 2023 · Amount on Record |
| Deed Sale | Jul 17, 2023 · Amount on Record |
| Prior Sale | Apr 21, 2022 · Amount on Record |
| Deed Document Number | 202367900 |
| Prior Transfer Date | Aug 10, 2004 |
| Prior Transfer Doc | 0000340610 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 17, 2023 |
| Property Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Document Number | 0000067900 |
| Map Reference | MB 195 PG 31 |
| Instrument Date | Jul 10, 2023 |
| Instrument | 2023-067900 |
| Transaction Type | Transfer |
| Record Updated | Jul 26, 2023 |
| Title Company | CHICAGO TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants in Common |
| Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Document Number | 0000067901 |
|---|---|
| Date | Jul 17, 2023 |
| Instrument | 2023-067901 |
| Name | CORNERSTONE FIRST MORTGAGE INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Aug 01, 2053 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Transaction Type | Mortgage |
| Record Updated | Nov 03, 2022 |
| Title Company | CHICAGO TITLE |
| Name | Verified Name |
|---|---|
| Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Document Number | 0000092039 |
|---|---|
| Date | Mar 26, 2021 |
| Instrument | 2021-092039 |
| Name | SIERRA PACIFIC MORTGAGE CO INC |
|---|---|
| Type | Mortgage Company |
| Address | FOLSOM, CA 95630 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 01, 2051 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Apr 21, 2022 |
| Property Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Document Number | 0000069397 |
| Map Reference | MB 195 PG 31 |
| Instrument Date | Apr 15, 2022 |
| Instrument | 2022-069397 |
| Transaction Type | Transfer |
| Record Updated | Nov 03, 2022 |
| Title Company | CHICAGO TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| 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 | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Document Number | 0000069398 |
|---|---|
| Date | Apr 21, 2022 |
| Instrument | 2022-069398 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 01, 2052 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 109 MT TRINITY CT, CLAYTON, CA 94517-1617 |
| Document Number | 0000243591 |
| Instrument Date | Mar 22, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Aug 29, 2018 |
| Name | Verified Name |
|---|---|
| Address | 109 MT TRINITY CT CLAYTON CA 945171617, CLAYTON, CA 94517-1617 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Clayton City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,638,630 (+2%) Land $769,896 Building $868,734 | |
| 2025 | $19,076.00 (-14.84%) | $1,606,500 (-16%) Land $754,800 Building $851,700 |
| 2023 | $22,399.00 (+75.27%) | $1,912,500 (+83.31%) Land $1,249,500 Building $663,000 |
| 2022 | $12,780.00 Homeowner's exemption | $1,043,335 Land $459,330 Building $584,005 |
Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 4 in force |
| Wildfire Risk | High above 89% of the US · above 70% of California |
|---|---|
| Wildfire Likelihood | 1% annual chance |
| Exposure | Direct burnable vegetation at the parcel |
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.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
Based on FCC filings for 86 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CONTRA COSTA WATER DISTRICT serves 210,500 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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