Contra Costa County property record for 527 Mount Dell Dr, Clayton, CA 94517
| Property Type | Townhouse |
|---|---|
| Details | 4 bd · 2 ba · 1,813 sqft · built 1975 |
| Lot Size | 0.088 acres (3,850 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $230,000 (Jul 1998) |
| Tax Bill | $3,487 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-302-004-5 |
| Primary APN | 119-302-004-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,813 sqft Living Area |
| Gross Area | 2,254 sqft |
| 1st Floor Area | 1,813 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1975 |
|---|---|
| Effective Year Built | Effective 1976 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 3,850 sqft (0.088 acres) |
| Garage Type | Attached |
| Garage Area | 441 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Forced Air with A/C |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 527 MT DELL DR |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1502 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Townhouse |
| Legal Description | T04504 L0006 B |
| Legal Tract | 04504 |
| Legal Lot Number | 6 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 355306 |
527 Mount Dell Dr, a townhouse, is owned and occupied by two individuals who bought it in July 1998.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 527 MT DELL DR, CLAYTON, CA 94517-1502 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Jul 8, 1998 · Amount on File |
| Deed Sale | Jul 8, 1998 · Amount on File |
| Deed Document Number | 1998157019 |
| Prior Transfer Date | May 15, 1998 |
| Prior Transfer Doc | 0000157018 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 527 Mount Dell Dr was $3,487 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 | $207,837 (+2%) Land $62,541 Building $145,296 | |
| 2025 | $3,487.00 Homeowner's exemption | $203,763 Land $61,315 Building $142,448 |
| 2023 | $3,296.00 (+2.2%) Homeowner's exemption | $195,852 Land $58,935 Building $136,917 |
| 2022 | $3,225.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 527 Mount Dell Dr in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 4 in force |
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.
Wildfire risk around 527 Mount Dell Dr is high, ranking above 88% of the US, with a 1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 88% of the US · above 69% of California |
|---|---|
| Wildfire Likelihood | 1% annual chance |
| Exposure | Direct burnable vegetation |
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 107 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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