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4803 Keller Ridge Dr, Clayton, CA 94517 Property Records

Contra Costa County property record for 4803 Keller Ridge Dr, Clayton, CA 94517

Property Summary

Property TypeCondominium
Details2 bd · 2.5 ba · 1,252 sqft · built 1997
Lot Size0.01 acres (455 sqft)
Owner2 Individual Names on File
Last Sale$645,000 (Jun 2023)
Tax Bill$8,941 (2025)
Deeds & MortgagesJun 2023 Sale & Mortgage
Feb 2022 Transfer
Flood ZoneZone X (minimal risk)
APN118-590-029-5

Property Details

APN / Parcel Number

Primary APN118-590-029-5
Alternative APN
  • 118-590-029

Interior

Bedrooms2 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms7 Rooms
Stories2 Stories
Building Area1,252 sqft Living Area
1st Floor Area664 sqft
2nd Floor Area588 sqft

Exterior

Year BuiltBuilt 1997
Effective Year BuiltEffective 1998
Architectural StyleCondo/Apartment
Lot Area455 sqft (0.01 acres)
Garage TypeAttached
Garage Area444 sqft
Parking Spaces2 Parking Spaces

Location & Zoning

Street Address4803 KELLER RIDGE DR
CityCLAYTON
StateCA
Zip94517-1938
Property CategoryResidential
Property TypeResidential > Condominium / Townhouse > Condominium
Legal DescriptionT7766 L37 B37 U7
Legal SubdivisionDIABLO RIDGE
Legal Tract7766
Legal Block37
Legal Lot Number37
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group1
Census Block1000
Census Tract355307

Owner

Source: Contra Costa County assessment roll, 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 Record2 Individual Names on File
Mailing Address4803 KELLER RIDGE DR, CLAYTON, CA 94517-1938
OccupancyOwner Occupied
Owner TypeIndividual
VestingJoint Tenants

Deeds, Mortgages & Sale History

DateDocument
Jun 20, 2023Grant Deed, Transfer · Conventional Mortgage
MASON MCDUFFIE MORTGAGE CORP
Feb 7, 2022Transfer on Death Deed, Transfer

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleJun 20, 2023 · Amount on Record
Deed SaleJun 20, 2023 · Amount on Record
Prior SaleNov 15, 2016 · Amount on Record
Deed Document Number202358397
Prior Transfer DateJan 18, 2022
Prior Transfer Doc0000023474
Record UpdatedSep 20, 2026

June 2023: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateJun 20, 2023
Property Address4803 KELLER RIDGE DR, CLAYTON, CA 94517-1938
Document Number0000058397
Map ReferenceMB 374 PG 28
Instrument DateJun 12, 2023
Instrument2023-058397
Transaction TypeTransfer
Record UpdatedAug 1, 2023
Title CompanyCHICAGO TITLE COMPANY

Transaction

AmountAmount Recorded
DownpaymentDownpayment on File
Loan-to-Value (LTV)LTV on Record
Tax$0.00
Amount AccuracyRounded by County
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants
Address4803 KELLER RIDGE DR, CLAYTON, CA 94517-1938

Mortgage

Document Number0000058398
DateJun 20, 2023
Instrument2023-058398
Lender
NameMASON MCDUFFIE MORTGAGE CORP
TypeMortgage Company
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term361 Months
DueJul 1, 2053

February 2022: Transfer on Death Deed, Transfer

Document TypeTransfer on Death Deed
JurisdictionCONTRA COSTA CA
Recording DateFeb 7, 2022
Property Address4803 KELLER RIDGE DR, CLAYTON, CA 94517-1938
Document Number0000023474
Map ReferenceDOC 97-024211
Instrument DateJan 18, 2022
Instrument2022-023474
Transaction TypeTransfer
Record UpdatedAug 1, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address4803 KELLER RIDGE DR, CLAYTON, CA 94517-1938

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityClayton City
Unified School DistrictMount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$684,478 (+2%) Land $382,034 Building $302,444
2025$8,941.00 (+31.93%) Homeowner's exemption$671,058 (+33.68%) Land $374,544 Building $296,514
2023$6,777.00 (+0.76%)$501,979 (+2%) Land $267,722 Building $234,257
2022$6,726.00$492,137 Land $262,473 Building $229,664

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 ZoneZone X
minimal risk
Flood Insurance RequirementNot 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 RiskHigh
above 80% of the US · above 58% of California
Wildfire Likelihood0.5% annual chance
ExposureDirect
burnable vegetation at the parcel

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemCONTRA COSTA WATER DISTRICT
serves 210,500 people · EPA ID CA0710003
Water SourceSurface water
Last State InspectionJan 2022
LeadUnder 1 ppb (2026–2028)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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 188 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 250
Starlink
Satellite		280 / 30

May also be available: T-Mobile USA, Unwired, Verizon.

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