Contra Costa County property record for 21 Mount Rainier Ct, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 2 ba · 2,083 sqft · built 1971 |
| Lot Size | 0.218 acres (9,500 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $315,500 (Jul 1998) |
| Tax Bill | $6,732 (2025) |
| Deeds & Mortgages | Mar 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-153-002-9 |
| Primary APN | 119-153-002-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,083 sqft Living Area |
| 1st Floor Area | 2,083 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1972 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 9,500 sqft (0.218 acres) |
| Lot Dimensions | 100 ft deep x 95 ft wide |
| Garage Type | Attached |
| Garage Area | 359 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | Deck Area |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 21 MT RAINIER CT |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1510 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T04011 L0031 B EX 1/2 MR |
| Legal Subdivision | SUBDIVISION 4011 |
| Legal Tract | 04011 |
| Legal Lot Number | 31 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4005 |
| Census Tract | 355306 |
Source: Contra Costa County records, as of July 14, 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 Record |
|---|---|
| Mailing Address | 21 MT RAINIER CT, CLAYTON, CA 94517-1510 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 7, 1998 · Amount on Record |
| Deed Sale | Jul 7, 1998 · Amount on Record |
| Deed Document Number | 1998155876 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 21 MT RAINIER CT, CLAYTON, CA 94517-1510 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | WFG NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 21 MT RAINIER CT, CLAYTON, CA 94517-1510 |
| Document Number | 0000091314 |
|---|---|
| Date | Mar 26, 2021 |
| Instrument | 2021-091314 |
| Name | RESIDENTIAL MORTGAGE FUNDING INC |
|---|---|
| Type | Mortgage Company |
| Address | ORANGE, CA 92867 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 1, 2051 |
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 | $504,482 (+2%) Land $167,889 Building $336,593 | |
| 2025 | $6,732.00 (+4.79%) Homeowner's exemption | $494,592 (+4.04%) Land $164,598 Building $329,994 |
| 2023 | $6,424.00 (+1.57%) Homeowner's exemption | $475,388 Land $158,207 Building $317,181 |
| 2022 | $6,325.00 |
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 69% of the US · above 44% of California |
|---|---|
| Wildfire Likelihood | 0.3% 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 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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