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4018 Dunbarton Cir, San Ramon, CA 94583 Property Records

Contra Costa County property record for 4018 Dunbarton Cir, San Ramon, CA 94583

Property Summary

Property TypeSingle Family Home
Details4 bd · 2 ba · 2,073 sqft · built 1985
Lot Size0.301 acres (13,120 sqft)
OwnerTrust Name on File
Last Sale$1,185,000 (Aug 2018)
Tax Bill$16,961 (2025)
Deeds & MortgagesJul 2019 Transfer
Aug 2018 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN213-112-014-5

Property Details

APN / Parcel Number

Primary APN213-112-014-5
Alternative APN
  • 213-112-014

Interior

Bedrooms4 Beds
Full Baths2 Baths
Total Rooms10 Rooms
Stories1 Story
Building Area2,073 sqft Living Area
1st Floor Area2,073 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1985
Effective Year BuiltEffective 1988
Architectural StyleContemporary
Lot Area13,120 sqft (0.301 acres)
Garage TypeAttached
Garage Area615 sqft
Parking Spaces2 Parking Spaces
PorchPorch

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemForced Air with A/C

Location & Zoning

Street Address4018 DUNBARTON CIR
CitySAN RAMON
StateCA
Zip94583-2565
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionT05520 L0020 B
Legal SubdivisionSUBDIVISION 5520
Legal Tract05520
Legal Lot Number20
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group1
Census Block1000
Census Tract345111

Owner

4018 Dunbarton Cir is held in a trust since July 2019.

Source: Contra Costa County records, as of July 14, 2026

Owner of RecordTrust Name on File
Mailing Address4018 DUNBARTON CIR, SAN RAMON, CA 94583-2565
Owner TypeCompany
VestingTrust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

DateDocument
Jul 17, 2019Quit Claim Deed, Transfer
NOT AVAILABLE
Aug 2, 2018Grant Deed, Transfer
KING FAMILY TRUST (PT)

Assessor's Deed Record

Deed NamesName on Deed
Last SaleAug 2, 2018 · Amount on File
Deed SaleAug 2, 2018 · Amount on File
Deed Document Number2018123482
Last Transfer DateJul 12, 2019
Transfer Doc0000110455
Record UpdatedOct 29, 2026

July 2019: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateJul 17, 2019
Property Address4018 DUNBARTON CIR, SAN RAMON, CA 94583-2565
Document Number0000110455
Instrument DateJul 12, 2019
Instrument110455
Transaction TypeTransfer
Record UpdatedJul 24, 2019
Title CompanyNOT AVAILABLE

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipLiving Trust
Address4018 DUNBARTON CIR SAN RAMON CA 945832565, SAN RAMON, CA 94583-2565

August 2018: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateAug 2, 2018
Property Address4018 DUNBARTON CIR, SAN RAMON, CA 94583-2565
Document Number0000123482
Instrument DateJul 30, 2018
Instrument123482
Transaction TypeTransfer
Record UpdatedAug 9, 2018
Title CompanyFIDELITY NATIONAL TITLE

Transaction

AmountAmount on Record
DownpaymentDownpayment on Record
Loan-to-Value (LTV)LTV on Record
Tax$1,303.50
Amount AccuracyFull Value
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address4018 DUNBARTON CIR SAN RAMON CA 945832565, SAN RAMON, CA 94583-2565

Mortgage

Document Number123483
DateAug 2, 2018
Instrument123483
Lender
NameKING FAMILY TRUST (PT)
Address4066 DUNBARTON CIR, SAN RAMON, CA 94583-2565
Agreement
AmountAmount on Record

Tax Assessment & Valuation

The 2025 property tax bill for 4018 Dunbarton Cir was $16,961.

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalitySan Ramon City
Unified School DistrictSan Ramon Valley Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$1,496,964 (+2%) Land $976,936 Building $520,028
2025$16,961.00$1,467,613 Land $957,781 Building $509,832
2023$15,371.00 (+4.44%)$1,320,126 Land $920,590 Building $399,536
2022$14,717.00

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

Flood

FEMA maps place 4018 Dunbarton Cir in Zone X, an area of minimal flood risk.

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

Wildfire risk around 4018 Dunbarton Cir is low, with less than a 0.01% annual chance of wildfire.

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

Wildfire RiskLow
lower than 96% of the US · lower than 97.4% of California
Wildfire LikelihoodUnder 0.01% annual chance
ExposureNone
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 SystemEAST BAY MUD
serves 1,468,000 people · EPA ID CA0110005
Water SourceSurface water
Last State InspectionDec 2021
LeadUnder 1 ppb (2022–2024)
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. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 686 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 2,000
Unwired
Fixed Wireless		300 / 25
Etheric Networks
Fixed Wireless		250 / 100
AT&T
DSL · Fixed Wireless in parts of the area		100 / 20

May also be available: T-Mobile, Verizon.

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