Contra Costa County property record for 321 Windmill Canyon Pl, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,877 sqft · built 1994 |
| Lot Size | 0.184 acres (8,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $600,000 (Jul 2013) |
| Tax Bill | $9,769 (2025) |
| Deeds & Mortgages | Jun 2018 Line of Credit Apr 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 118-451-011-1 |
| Primary APN | 118-451-011-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 1,877 sqft Living Area |
| 1st Floor Area | 943 sqft |
| 2nd Floor Area | 934 sqft |
| Year Built | Built 1994 |
|---|---|
| Effective Year Built | Effective 1994 |
| Lot Area | 8,000 sqft (0.184 acres) |
| Garage Type | Attached |
| Garage Area | 539 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 321 WINDMILL CANYON PL |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1904 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7262 L61 |
| Legal Subdivision | WINDMILL CNAYON UN |
| Legal Tract | 7262 |
| Legal Lot Number | 61 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 355307 |
321 Windmill Canyon Pl is owned and occupied by two individuals who acquired it in September 2014.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 321 WINDMILL CANYON PL, CLAYTON, CA 94517-1904 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Jun 29, 2018 | Deed of Trust, Mortgage · Line of Credit UNCLE CU |
| Apr 28, 2017 | Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 25, 2013 · Amount on File |
| Deed Sale | Jul 25, 2013 · Amount on File |
| Prior Sale | Jul 22, 2005 · Amount on File |
| Deed Document Number | 2013185394 |
| Last Transfer Date | Sep 3, 2014 |
| Transfer Doc | 0000150744 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 WINDMILL CANYON PL, CLAYTON, CA 94517-1904 |
| Document Number | 0000131695 |
| Instrument Date | Jun 29, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Aug 27, 2018 |
| Title Company | SERVICELINK |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 321 WINDMILL CANYON PL CLAYTON CA 945171904, CLAYTON, CA 94517-1904 |
| Document Number | 0000131695 |
|---|---|
| Date | Aug 17, 2018 |
| Instrument | 131695 |
| Name | UNCLE CU |
|---|---|
| Type | Credit Union |
| Address | LIVERMORE, CA 94551 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Term | 300 Months |
| Due | Aug 16, 2043 |
| Rate Type | Adjustable Rate |
|---|
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 WINDMILL CANYON PL, CLAYTON, CA 94517-1904 |
| Document Number | 0000078212 |
| Instrument Date | Apr 28, 2017 |
| Transaction Type | Mortgage |
| Record Updated | May 15, 2017 |
| Title Company | TSI TITLE COMPANY/CA INC, TSI TITLE CO/CA INC |
| Name | Verified Name |
|---|---|
| Relationship | Husband and Wife |
| Address | 321 WINDMILL CANYON PL CLAYTON CA 945171904, CLAYTON, CA 94517-1904 |
| Document Number | 0000078212 |
|---|---|
| Date | May 5, 2017 |
| Instrument | 78212 |
| Name | QUICKEN LNS |
|---|---|
| Type | Funding / Finance Company |
| Address | DETROIT, MI 48226-1906 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | May 4, 2047 |
The 2025 property tax bill for 321 Windmill Canyon Pl was $9,769.
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 | $750,215 (+2%) Land $450,131 Building $300,084 | |
| 2025 | $9,769.00 | $735,505 Land $441,305 Building $294,200 |
| 2023 | $9,101.00 (+0.52%) | $706,946 Land $424,169 Building $282,777 |
| 2022 | $9,054.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 321 Windmill Canyon 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 321 Windmill Canyon Pl is high, ranking above 80% of the US, with a 0.5% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 80% of the US · above 58% of California |
|---|---|
| Wildfire Likelihood | 0.5% 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 308 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
May also be available: Unwired, Verizon.
5G (outdoors only) and 4G LTE
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