3424 Keystone Loop, Discovery Bay, CA 94505 Property Records

Contra Costa County property record for 3424 Keystone Loop, Discovery Bay, CA 94505 · Last verified July 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	4 Beds
Bathrooms	4 Baths
Year Built	Built 2003
Square Footage	3,517 sqft Living Area
Lot Size	6,500 sqft (0.149 acres)
Occupancy	Owner Occupied
Last Sale	$539,000 (2003)
Tax Bill	$10,505.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`011-421-041-2`
Alternative APN	`011-421-041`

Interior

Bedrooms	4 Beds
Full Baths	4 Baths
Total Rooms	11 Rooms
Building Area	3,517 sqft Living Area
1st Floor	1,719 sqft 1st Floor
2nd Floor	1,798 sqft 2nd Floor
Stories	2 Stories

Exterior

Year Built	Built 2003
Effective Year Built	Effective 2003
Architectural Style	Cluster Style
Lot Area	6,500 sqft (0.149 acres)
Parking Spaces	2 Parking Spaces
Garage Type	Attached Garage
Garage Area	596 sqft Garage

Utilities and HVAC

Cooling System	Central Cooling

Location & Zoning

Street Address	3424 KEYSTONE LOOP
City	DISCOVERY BAY
State	CA
Zip	94505-2324
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	T8430 L41
Legal Subdivision	SUBDIVISION 8430
Legal Tract	8430
Legal Lot Number	41
Jurisdiction	CONTRA COSTA CA
Minor Civil Division	EAST CONTRA COSTA
Census Blockgroup	3
Census Block	3003
Census Tract	304007

Owner

Source: Contra Costa County records · APN 011-421-041-2

Assessment roll updated July 14, 2026 · Last verified July 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 File
Mailing Address	3424 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2324
Occupancy	Owner Occupied
Owner Type	Owner is a Company
Vesting	Owner is a Trust, Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Nov 20, 2003 · Amount on Record
Deed Sale	Nov 20, 2003 · Amount on Record
Deed Doc Number	2003567365
Prior Transfer Date	Oct 16, 2002
Prior Transfer Doc	0000401496
Record Refreshed	Sep 20, 2026

October 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 22, 2020
Property Address	3424 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2324
Document Number	0000246777
Instrument Date	Aug 27, 2020
Instrument	246777
Transaction Type	Transfer
Record Updated	Nov 02, 2020
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Document

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	3424 KEYSTONE LOOP DISCOVERY BAY CA 945052324, DISCOVERY BAY, CA 94505-2324

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Elementary School District	Byron Union Elementary School District (KG - 08)
Secondary School District	Liberty Union High School District (09 - 12)

Tax Bill & Assessment History

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

Year	Tax Bill	Assessed Value
2026		$781,367 (+2%) Land $181,269 Building $600,098
2025	$10,505.00 (+6.48%) Homeowner's exemption	$766,047 (+4.04%) Land $177,715 Building $588,332
2023	$9,866.00 (+1.67%) Homeowner's exemption	$736,303 Land $170,815 Building $565,488
2022	$9,704.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Flood Hazard	Moderate
500-Year Floodplain	Yes
Special Flood Hazard Area	No
Nearest Special Flood Hazard Area	Zone A, within 500 ft

Wildfire

Wildfire Risk	Not rated no burnable land in reach
Wildfire Likelihood	Negligible
Exposure	None beyond ember reach

Values are read at the parcel center point; lenders make the official flood determination.