506 Mount Dell Dr, Clayton, CA 94517 Property Records

Contra Costa County property record for 506 Mount Dell Dr, Clayton, CA 94517

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,141 sqft · built 1972
Lot Size	0.207 acres (9,000 sqft)
Owner	2 Individual Names on File
Last Sale	$521,500 (Jan 2010)
Tax Bill	$8,701 (2025)
Deeds & Mortgages	Sep 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`119-172-021-6`

Property Details

APN / Parcel Number

Primary APN	`119-172-021-6`
Alternative APN	`119-172-021`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	1 Story
Building Area	2,141 sqft Living Area
1st Floor Area	1,731 sqft
Basement Area	410 sqft

Exterior

Year Built	Built 1972
Effective Year Built	Effective 1978
Architectural Style	Cluster
Lot Area	9,000 sqft (0.207 acres)
Garage Type	Attached
Garage Area	491 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	506 MT DELL DR
City	CLAYTON
State	CA
Zip	94517-1503
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T04012 L0035 B EX MR
Legal Subdivision	SUBDIVISION 4012
Legal Tract	04012
Legal Lot Number	35
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3009
Census Tract	355306

Owner

506 Mount Dell Dr is owned and occupied by two individuals who bought it in January 2010.

Source: Contra Costa County records, as of July 14, 2026

Owner of Record	2 Individual Names on File
Mailing Address	506 MT DELL DR, CLAYTON, CA 94517-1503
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.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jan 14, 2010 · Amount on File
Deed Sale	Jan 14, 2010 · Amount on File
Prior Sale	Nov 2, 2009 · Amount on File
Deed Document Number	20107814
Prior Transfer Date	Nov 30, 2004
Prior Transfer Doc	0000468970
Record Updated	Oct 29, 2026

September 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	506 MT DELL DR, CLAYTON, CA 94517-1503
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	WESTMINSTER TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	506 MT DELL DR, CLAYTON, CA 94517-1503

Mortgage

Document Number	0000213503
Date	Sep 23, 2020
Instrument	2020-213503

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company
Address	PONTIAC, MI 48341

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2050

Tax Assessment & Valuation

The 2025 property tax bill for 506 Mount Dell Dr was $8,701 with a homeowner's exemption.

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Clayton City
Unified School District	Mount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$686,215 (+2%) Land $473,981 Building $212,234
2025	$8,701.00 Homeowner's exemption	$672,761 Land $464,688 Building $208,073
2023	$8,322.00 (+1.4%) Homeowner's exemption	$646,640 Land $446,645 Building $199,995
2022	$8,207.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 506 Mount Dell Dr in Zone X, an area of minimal flood risk.

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
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

Wildfire risk around 506 Mount Dell Dr is high, ranking above 76% of the US, with a 0.4% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	High above 76% of the US · above 53% of California
Wildfire Likelihood	0.4% 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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

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