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4100 Diorite Ct, Antioch, CA 94531 Property Records

Contra Costa County property record for 4100 Diorite Ct, Antioch, CA 94531 · Last verified July 2026

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 3,180 sqft · built 2001
Lot Size0.188 acres (8,197 sqft)
Owner2 Individual Names on File
Last Sale$828,000 (Feb 2023)
Tax Bill$9,835 (2025)
Deeds & MortgagesMay 2026 Mortgage
May 2026 Mortgage
+ 4 more
Flood ZoneZone X (minimal risk)
APN053-640-011-2

Property Details

APN / Parcel Number

Primary APN053-640-011-2
Alternative APN
  • 053-640-011

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms9 Rooms
Building Area3,180 sqft Living Area
1st Floor Area2,032 sqft 1st Floor
2nd Floor Area1,148 sqft 2nd Floor
Stories2 Stories

Exterior

Year BuiltBuilt 2001
Effective Year BuiltEffective 2002
Lot Area8,197 sqft (0.188 acres)
Parking Spaces2 Parking Spaces
Garage TypeAttached
Garage Area680 sqft Garage

Utilities, Heating & Cooling

Cooling SystemCentral

Location & Zoning

Street Address4100 DIORITE CT
CityANTIOCH
StateCA
Zip94531-9372
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionT8231 L198
Legal SubdivisionSUBDIVISION 8231
Legal Tract8231
Legal Lot Number198
JurisdictionCONTRA COSTA CA
Township / Civil DivisionANTIOCH-PITTSBURG
Census Block Group2
Census Block2011
Census Tract355111

Owner

Source: Contra Costa County records · APN 053-640-011-2

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 Individual Names on File
Mailing Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
OccupancyOwner Occupied
Owner TypeIndividual
VestingJoint Tenants

Deeds, Mortgages & Sale History

DateDocument
May 15, 2026Deed of Trust, Mortgage · Conventional Mortgage
NONE LISTED ON DOCUMENT
May 29, 2026Deed of Trust, Mortgage · Conventional Mortgage
FIRST AMERICAN TITLE
Feb 28, 2023Grant Deed, Transfer · Conventional Mortgage
NEW WAVE LENDING GROUP INC
Nov 27, 2018Deed of Trust, Mortgage · Stand-Alone Second Mortgage
SAFEAMERICA CU
Oct 07, 2020Quit Claim Deed, Transfer
FIRST AMERICAN TITLE
Oct 07, 2020Grant Deed, Transfer
FIRST AMERICAN TITLE COMPANY

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleFeb 28, 2023 · Amount on Record
Deed SaleFeb 28, 2023 · Amount on Record
Prior SaleOct 07, 2020 · Amount on Record
Deed Document Number202317955
Prior Transfer DateSep 25, 2020
Prior Transfer Doc0000229707
Record UpdatedSep 20, 2026

May 2026: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCONTRA COSTA CA
Recording DateMay 15, 2026
Property Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
Document Number0000051288
Instrument DateMay 13, 2026
Instrument202651288
Transaction TypeMortgage
Record UpdatedJul 12, 2026
Title CompanyNONE LISTED ON DOCUMENT

Transferred To (Grantee/Buyer)

NameVerified Name
Address4100 DIORITE CT, ANTIOCH, CA 94531-9372

Mortgage

Document Number0000051288,
DateMay 15, 2026
Instrument202651288
Lender
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term360 Months
Interest
Rate6.3%
Max Rate-1%

May 2026: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCONTRA COSTA CA
Recording DateMay 29, 2026
Property Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
Document Number0000056652
Instrument DateMay 06, 2026
Instrument202656652
Transaction TypeMortgage
Record UpdatedJul 12, 2026
Title CompanyFIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

NameVerified Name
Address4100 DIORITE CT, ANTIOCH, CA 94531-9372

Mortgage

Document Number0000056652,
DateMay 29, 2026
Instrument202656652
Lender
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term360 Months
Interest
Rate6.37%
Max Rate-1%

February 2023: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateFeb 28, 2023
Property Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
Document Number2018007694
Map ReferenceMB 426 PG 10
Instrument DateFeb 22, 2023
Instrument2018-007694
Transaction TypeTransfer
Record UpdatedMar 09, 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
Address4100 DIORITE CT, ANTIOCH, CA 94531-9372

Mortgage

Document Number0000017956
DateFeb 28, 2023
Instrument2023-017956
Lender
NameNEW WAVE LENDING GROUP INC
TypeNon-Lending Institution
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term361 Months
DueMar 01, 2053

November 2018: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCONTRA COSTA CA
Property Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
Transaction TypeMortgage
Record UpdatedNov 03, 2022
Title CompanyNORTH AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000190108
DateNov 27, 2018
Instrument2018-190108
Lender
NameSAFEAMERICA CU
TypeCredit Union
AddressPLEASANTON, CA 94588
Agreement
TypeStand-Alone Second Mortgage
AmountAmount Recorded
Term181 Months
DueDec 01, 2033

October 2020: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateOct 07, 2020
Property Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
Document Number0000229707
Instrument DateSep 25, 2020
Instrument229707
Transaction TypeTransfer
Record UpdatedOct 23, 2020
Title CompanyFIRST AMERICAN TITLE

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipSeparate Estate/Property
Address4100 DIORITE CT ANTIOCH CA 945319372, ANTIOCH, CA 94531-9372

October 2020: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateOct 07, 2020
Property Address4100 DIORITE CT, ANTIOCH, CA 94531-9372
Document Number0000229706
Map ReferenceMB 426 PG 10
Instrument DateSep 25, 2020
Instrument2020-229706
Transaction TypeTransfer
Record UpdatedJul 27, 2021
Title CompanyFIRST AMERICAN TITLE COMPANY

Transaction

AmountAmount Recorded
Tax$0.00
Amount AccuracyRounded by County
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address4100 DIORITE CT, ANTIOCH, CA 94531-9372

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
MunicipalityAntioch City
Unified School DistrictAntioch Unified School District (KG - 12)

Tax Bill & Assessment History

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

YearTax BillAssessed Value
2026$878,679 (+2%) Land $206,935 Building $671,744
2025$9,835.00 (+11.12%)$861,451 (+9.67%) Land $202,878 Building $658,573
2023$8,851.00 (+1.63%)$785,502 Land $176,868 Building $608,634
2022$8,709.00

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 HazardMinimal
500-Year FloodplainNo
Special Flood Hazard AreaNo

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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