4420 Black Walnut Ct, Concord, CA 94521 Property Records

Contra Costa County property record for 4420 Black Walnut Ct, Concord, CA 94521

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,130 sqft · built 1973
Lot Size	0.131 acres (5,700 sqft)
Owner	Company Name on Record
Last Sale	$510,000 (Aug 2003)
Tax Bill	$11,798 (2025)
Deeds & Mortgages	Feb 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`133-250-011-3`

Property Details

APN / Parcel Number

Primary APN	`133-250-011-3`
Alternative APN	`133-250-011`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,130 sqft Living Area
Gross Area	2,568 sqft
1st Floor Area	1,048 sqft
2nd Floor Area	1,082 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1973
Effective Year Built	Effective 1975
Architectural Style	Cluster
Exterior Material	Stucco
Roof Material	Wood Shingle
Lot Area	5,700 sqft (0.131 acres)
Lot Dimensions	95 ft deep x 60 ft wide
Garage Type	Attached
Garage Area	438 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	4420 BLACK WALNUT CT
City	CONCORD
State	CA
Zip	94521-4320
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	PD
Legal Description	TRACT 3941 LOT 536 EX MR
Legal Subdivision	COWELL
Legal Tract	3941
Legal Lot Number	536
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	2
Census Block	2004
Census Tract	334006

Owner

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	Company Name on Record
Mailing Address	721 TAHOE CT, FAIRFIELD, CA 94534-6692
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Aug 18, 2003 · Amount on Record
Deed Sale	Aug 18, 2003 · Amount on Record
Deed Document Number	2003405830
Last Transfer Date	Jan 17, 2017
Transfer Doc	0000028615
Record Updated	Oct 29, 2026

February 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Feb 15, 2017
Property Address	4420 BLACK WALNUT CT, CONCORD, CA 94521-4320
Document Number	0000028615
Instrument Date	Jan 17, 2017
Instrument	28615
Transaction Type	Transfer
Record Updated	Feb 21, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	721 TAHOE CT FAIRFIELD CA 945346692, FAIRFIELD, CA 94534-6692

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$739,594 (+2%) Land $355,294 Building $384,300
2025	$11,798.00 (+3.39%)	$725,093 (+4.04%) Land $348,328 Building $376,765
2023	$11,411.00 (+0.97%)	$696,939 Land $334,803 Building $362,136
2022	$11,301.00

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

Flood

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

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

Wildfire Risk	Moderate above 43% of the US · lower than 74% of California
Wildfire Likelihood	0.07% annual chance
Exposure	None beyond ember reach

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 669 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Astound Broadband Cable	1,500 / 50
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20
AT&T DSL	100 / 20