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3435 Keystone Loop, Discovery Bay, CA 94505 Property Records

Contra Costa County property record for 3435 Keystone Loop, Discovery Bay, CA 94505 · Last verified July 2026

Property Highlights

Property TypeResidential > Single Family > Home
Bedrooms5 Beds
Bathrooms4 Baths
Year BuiltBuilt 2003
Square Footage4,011 sqft Living Area
Lot Size7,300 sqft (0.168 acres)
GarageAttached, 438 sqft
Last Sale$609,000 (2020)
Tax Bill$9,485.00 (2025)

Property Details

APN / Parcel Number

Primary APN011-421-006-5
Alternative APN
  • 011-421-006

Interior

Bedrooms5 Beds
Full Baths4 Baths
Total Rooms12 Rooms
Building Area4,011 sqft Living Area
1st Floor1,984 sqft 1st Floor
2nd Floor2,027 sqft 2nd Floor
Stories2 Stories

Exterior

Year BuiltBuilt 2003
Effective Year BuiltEffective 2003
Architectural StyleCluster Style
Lot Area7,300 sqft (0.168 acres)
Parking Spaces2 Parking Spaces
Garage TypeAttached Garage
Garage Area438 sqft Garage

Utilities and HVAC

Cooling SystemCentral Cooling

Location & Zoning

Street Address3435 KEYSTONE LOOP
CityDISCOVERY BAY
StateCA
Zip94505-2320
Property UsageResidential Property Usage
TypeResidential > Single Family > Home
Legal DescriptionT8430 POR LOT 6
Legal SubdivisionSUB 8430
Legal Tract8430
Legal Lot Number6
JurisdictionCONTRA COSTA CA
Minor Civil DivisionEAST CONTRA COSTA
Census Blockgroup3
Census Block3001
Census Tract304007

Owner

Source: Contra Costa County records · APN 011-421-006-5

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 Record2 Company Names on File
Mailing Address3310 BYER RD, BYRON, CA 94514-1516
Owner TypeOwner is a Company
VestingOwner is a Trust, Trust

Deeds, Mortgages & Sale History

DateDocument
Sep 07, 2023Intrafamily Transfer, Transfer
Jul 01, 2020Intrafamily Transfer, Transfer · Conventional Mortgage
FREMONT BANK
May 01, 2020Grant Deed, Transfer
FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO
May 01, 2020Affidavit of Death, Transfer
FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleMay 01, 2020 · Amount on Record
Deed SaleMay 01, 2020 · Amount on Record
Deed Doc Number202083207
Last Transfer DateJul 28, 2023
Transfer Doc0000086276
Record RefreshedSep 20, 2026

September 2023: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateSep 07, 2023
Property Address3435 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Document Number0000086276
Map ReferenceMB 436 PG 17
Instrument DateJul 28, 2023
Instrument2023-086276
Transaction TypeTransfer
Record UpdatedSep 15, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Interfamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipLiving Trust
Address3310 BYER RD, BYRON, CA 94514-1516

July 2020: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateJul 01, 2020
Property Address3435 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Document Number0000129913
Map ReferenceMB 436 PG 17
Instrument DateJun 16, 2020
Instrument2020-129913
Transaction TypeTransfer
Record UpdatedNov 03, 2022
Title CompanyFIDELITY NATIONAL TITLE

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Interfamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants
Address3435 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320

Mortgage

Document Number0000129914
DateJul 01, 2020
Instrument2020-129914
Lender
NameFREMONT BANK
TypeBank
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term360 Months
DueJul 01, 2050

May 2020: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateMay 01, 2020
Property Address3435 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Document Number0000083207
Instrument DateApr 28, 2020
Instrument83207
Transaction TypeTransfer
Record UpdatedMay 14, 2020
Title CompanyFIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

AmountAmount Recorded
Tax$670.00
Amount AccuracyFull Value
Additional
  • Notice of Default
  • Arms Length Transaction

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property
Address3310 BYER RD BYRON CA 945141516, BYRON, CA 94514-1516

May 2020: Affidavit of Death, Transfer

Document TypeAffidavit of Death
JurisdictionCONTRA COSTA CA
Recording DateMay 01, 2020
Property Address3435 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Document Number0000083206
Instrument DateApr 28, 2020
Instrument83206
Transaction TypeTransfer
Record UpdatedMay 14, 2020
Title CompanyFIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Tax$0.00
Additional
  • Interfamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address5554 WOODLEAF DR CARMICHAEL CA 95608, CARMICHAEL, CA 95608

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
Elementary School DistrictByron Union Elementary School District (KG - 08)
Secondary School DistrictLiberty 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.

YearTax BillAssessed Value
2026$679,346 (+2%) Land $100,394 Building $578,952
2025$9,485.00 (+6.61%)$666,026 (+4.04%) Land $98,426 Building $567,600
2023$8,897.00 (+1.66%)$640,165 Land $94,605 Building $545,560
2022$8,752.00

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 ZoneZone X
Flood HazardModerate
500-Year FloodplainYes
Special Flood Hazard AreaNo
Nearest Special Flood Hazard AreaZone A, within 500 ft

Wildfire

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

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

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