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3477 Keystone Loop, Discovery Bay, CA 94505 Property Records

Contra Costa County property record for 3477 Keystone Loop, Discovery Bay, CA 94505 · Last verified July 2026

Property Highlights

Property TypeResidential > Single Family > Home
Bedrooms3 Beds
Bathrooms2 Baths
Year BuiltBuilt 2004
Square Footage2,033 sqft Living Area
Lot Size7,000 sqft (0.161 acres)
GarageAttached, 482 sqft
Last Sale$552,000 (2018)
Tax Bill$9,069.00 (2025)

Property Details

APN / Parcel Number

Primary APN011-421-013-1
Alternative APN
  • 011-421-013

Interior

Bedrooms3 Beds
Full Baths2 Baths
Total Rooms7 Rooms
Building Area2,033 sqft Living Area
1st Floor2,033 sqft 1st Floor
Stories1 Stories

Exterior

Year BuiltBuilt 2003
Effective Year BuiltEffective 2004
Architectural StyleCluster Style
Lot Area7,000 sqft (0.161 acres)
Parking Spaces2 Parking Spaces
Garage TypeAttached Garage
Garage Area482 sqft Garage

Utilities and HVAC

Cooling SystemCentral Cooling

Location & Zoning

Street Address3477 KEYSTONE LOOP
CityDISCOVERY BAY
StateCA
Zip94505-2320
Property UsageResidential Property Usage
TypeResidential > Single Family > Home
Legal DescriptionT8430 L13
Legal SubdivisionSUBDIVISION 8430
Legal Tract8430
Legal Lot Number13
JurisdictionCONTRA COSTA CA
Minor Civil DivisionEAST CONTRA COSTA
Census Blockgroup3
Census Block3001
Census Tract304007

Owner

Source: Contra Costa County records · APN 011-421-013-1

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 RecordCompany Name on File
Mailing Address3477 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Owner TypeOwner is a Company
VestingOwner is a Trust, Trust

Deeds, Mortgages & Sale History

DateDocument
Jun 22, 2020Deed of Trust, Mortgage · Conventional Mortgage
GUILD MORTGAGE CO
Oct 17, 2018Quit Claim Deed, Transfer
Quitclaim Document
May 29, 2018Grant Deed, Transfer · Conventional Mortgage
GUILD MORTGAGE CO

Assessor's Deed Record

Deed NamesVerified Name on Deed
Last SaleMay 29, 2018 · Amount on Record
Deed SaleMay 29, 2018 · Amount on Record
Prior SaleJul 15, 2013 · Amount on Record
Deed Doc Number201883803
Prior Transfer DateMar 27, 2014
Prior Transfer Doc0000050758
Record RefreshedSep 20, 2026

June 2020: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCONTRA COSTA CA
Property Address3477 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Transaction TypeMortgage
Record UpdatedNov 03, 2022
Title CompanyFIDELITY TITLE COMPANY

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000120930
DateJun 22, 2020
Instrument2020-120930
Lender
NameGUILD MORTGAGE CO
TypeMortgage Company
AddressSAN DIEGO, CA 92111
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term181 Months
DueJul 01, 2035

October 2018: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateOct 17, 2018
Property Address3477 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Document Number0000164383
Instrument DateOct 16, 2018
Instrument164383
Transaction TypeTransfer
Record UpdatedOct 26, 2018

Transaction

Tax$0.00
Additional
  • Quitclaim Document
  • Interfamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipRevocable Trust
Address3477 KEYSTONE LOOP DISCOVERY BAY CA 945052320, DISCOVERY BAY, CA 94505-2320

May 2018: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateMay 29, 2018
Property Address3477 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320
Document Number0000083803
Map ReferenceMB 436 PG 17
Instrument DateMay 21, 2018
Instrument2018-083803
Transaction TypeTransfer
Record UpdatedNov 03, 2022
Title CompanyNORTH AMERICAN TITLE

Transaction

AmountAmount Recorded
DownpaymentDownpayment on File
Loan-to-Value (LTV)LTV on Record
Tax$0.00
Amount AccuracyRounded Values by County
Additional
  • Arms Length Transaction

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants
Address3477 KEYSTONE LOOP, DISCOVERY BAY, CA 94505-2320

Mortgage

Document Number0000083804
DateMay 29, 2018
Instrument2018-083804
Lender
NameGUILD MORTGAGE CO
TypeMortgage Company
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term361 Months
DueJun 01, 2048

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$640,637 (+2%) Land $150,874 Building $489,763
2025$9,069.00 (+6.69%)$628,076 (+4.04%) Land $147,916 Building $480,160
2023$8,500.00 (+1.66%)$603,689 Land $142,173 Building $461,516
2022$8,361.00

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 AE, within 500 ft

Wildfire

Wildfire RiskModerate
above 56% of the US · above 33% of California
Wildfire LikelihoodAbout 1 in 847 per year
ExposureDirect
burnable vegetation at the parcel

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

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