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312 Downham Ct, Walnut Creek, CA 94598 Property Records

Contra Costa County property record for 312 Downham Ct, Walnut Creek, CA 94598

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 2,262 sqft · built 1977
Lot Size0.251 acres (10,925 sqft)
Owner2 Individual Names on File
Last Sale$1,505,000 (Aug 2021)
Tax Bill$16,698 (2025)
Deeds & MortgagesAug 2021 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN143-103-018-6

Property Details

APN / Parcel Number

Primary APN143-103-018-6
Alternative APN
  • 143-103-018

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms10 Rooms
Stories2 Stories
Building Area2,262 sqft Living Area
Gross Area2,800 sqft
1st Floor Area1,223 sqft
2nd Floor Area1,039 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1977
Effective Year BuiltEffective 1978
Architectural StyleRanch
Exterior MaterialStucco
Construction TypeFrame
Roof MaterialWood Shingle
Lot Area10,925 sqft (0.251 acres)
Lot Dimensions102 ft deep x 95 ft wide
Garage TypeAttached
Garage Area538 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemForced Air with A/C
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address312 DOWNHAM CT
CityWALNUT CREEK
StateCA
Zip94598-2320
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR10
Legal DescriptionTRACT 4591 LOT 30
Legal SubdivisionSUBDIVISION 4591
Legal Tract4591
Legal Lot Number30
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group2
Census Block2021
Census Tract338201

Owner

312 Downham Ct is owned and occupied by two individuals who bought it in August 2021.

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

Owner of Record2 Individual Names on File
Mailing Address312 DOWNHAM CT, WALNUT CREEK, CA 94598-2320
OccupancyOwner Occupied
Owner TypeIndividual
VestingCommunity Property

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

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleAug 26, 2021 · Amount on File
Deed SaleAug 26, 2021 · Amount on File
Prior SaleDec 13, 2000 · Amount on File
Deed Document Number2021238998
Prior Transfer DateFeb 18, 2016
Prior Transfer Doc0000031054
Record UpdatedOct 29, 2026

August 2021: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateAug 26, 2021
Property Address312 DOWNHAM CT, WALNUT CREEK, CA 94598-2320
Document Number0000238998
Map ReferenceMB 168 PG 45
Instrument DateAug 24, 2021
Instrument2021-238998
Transaction TypeTransfer
Record UpdatedNov 3, 2022
Title CompanyCHICAGO TITLE COMPANY

Transaction

AmountAmount on Record
DownpaymentDownpayment on Record
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
RelationshipCommunity Property with Right of Survivorship
Address312 DOWNHAM CT, WALNUT CREEK, CA 94598-2320

Mortgage

Document Number0000238999
DateAug 26, 2021
Instrument2021-238999
Lender
NameALAMEDA MORTGAGE CORP
TypeMortgage Company
Agreement
TypeConventional Mortgage
AmountAmount on Record
Term361 Months
DueSep 1, 2051

Tax Assessment & Valuation

The 2025 property tax bill for 312 Downham Ct was $16,698 with a homeowner's exemption.

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

Property Jurisdictions

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

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$1,450,000 (+0.69%) Land $789,070 Building $660,930
2025$16,698.00 Homeowner's exemption$1,440,000 Land $783,628 Building $656,372
2023$16,234.00 (-7.7%) Homeowner's exemption$1,400,000 Land $750,000 Building $650,000
2022$17,589.00

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

Flood

FEMA maps place 312 Downham Ct in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Community Rating SystemClass 8 (10% premium discount)
Nearby Flood Policies2 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

The area around 312 Downham Ct has no burnable land within ember reach, so its wildfire risk is not rated.

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

Wildfire RiskNot rated
no burnable land within 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 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 369 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 250
Astound Broadband
Cable · Fiber in parts of the area		1,500 / 50
Unwired
Fixed Wireless		300 / 25
Verizon
Fixed Wireless		300 / 20
AT&T
DSL		100 / 20

May also be available: Etheric Networks, Sonic Telecom, T-Mobile.

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