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623 W 16th St, Antioch, CA 94509 Property Records

Contra Costa County property record for 623 W 16th St, Antioch, CA 94509

Property Summary

Property TypeDuplex
Details4 bd · 2 ba · 2,160 sqft · built 1973
Lot Size0.115 acres (5,000 sqft)
OwnerCompany Name on Record
Last Sale$143,000 (Aug 2010)
Tax Bill$3,165 (2025)
Deeds & MortgagesFeb 2022 Transfer
Feb 2022 Transfer
Flood ZoneZone X (minimal risk)
APN067-202-009-6

Property Details

APN / Parcel Number

Primary APN067-202-009-6
Alternative APN
  • 067-202-009

Interior

Bedrooms4 Beds
Full Baths2 Baths
Total Rooms10 Rooms
Stories2 Stories
Building Area2,160 sqft Living Area
1st Floor Area1,080 sqft
2nd Floor Area1,080 sqft

Exterior

Year BuiltBuilt 1973
Effective Year BuiltEffective 1974
Architectural StyleDuplex Single
Lot Area5,000 sqft (0.115 acres)
Garage TypeAttached
Garage Area480 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Heating SystemCentral

Location & Zoning

Street Address623 W 16TH ST
CityANTIOCH
StateCA
Zip94509-2252
Property CategoryResidential
Property TypeResidential > Multi-Unit > Duplex
Local Zoning CodeR2
Legal DescriptionGREENE SUBN LOT 6 BLK 7
Legal SubdivisionGREENE SUB
Legal Block7
Legal Lot Number6
JurisdictionCONTRA COSTA CA
Township / Civil DivisionANTIOCH-PITTSBURG
Census Block Group1
Census Block1009
Census Tract307102

Owner

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

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

Owner of RecordCompany Name on Record
Mailing Address1892 SCHOOL ST, MORAGA, CA 94556-1753
Owner TypeCompany
VestingTrust

Deeds, Mortgages & Sale History

DateDocument
Feb 25, 2022Intrafamily Transfer, Transfer
Feb 25, 2022Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed NamesName on Deed
Last SaleAug 31, 2010 · Amount on Record
Deed SaleAug 31, 2010 · Amount on Record
Prior SaleJul 21, 2010 · Amount on Record
Deed Document Number2010182837
Last Transfer DateFeb 22, 2022
Transfer Doc0000035143
Record UpdatedOct 29, 2026

February 2022: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateFeb 25, 2022
Property Address623 W 16TH ST, ANTIOCH, CA 94509-2252
Document Number0000035143
Map ReferenceMB 18 PG 413
Instrument DateFeb 22, 2022
Instrument2022-035143
Transaction TypeTransfer
Record UpdatedNov 3, 2022

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property
Address1892 SCHOOL ST, MORAGA, CA 94556-1753

February 2022: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateFeb 25, 2022
Property Address623 W 16TH ST, ANTIOCH, CA 94509-2252
Document Number0000035144
Map ReferenceMB 18 PG 413
Instrument DateFeb 22, 2022
Instrument2022-035144
Transaction TypeTransfer
Record UpdatedJun 7, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address1892 SCHOOL ST, MORAGA, CA 94556-1753

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityAntioch City
Unified School DistrictAntioch Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$186,857 (+2%) Land $39,198 Building $147,659
2025$3,165.00 (+7.29%)$183,194 (+4.04%) Land $38,430 Building $144,764
2023$2,950.00 (+1.17%)$176,083 Land $36,939 Building $139,144
2022$2,916.00

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 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 SystemCITY OF ANTIOCH
serves 116,781 people · EPA ID CA0710001
Water SourceSurface water
Last State InspectionJan 2024
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 605 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
AT&T
Fiber · Fixed Wireless, DSL in parts of the area		5,000 / 5,000
Xfinity
Cable		2,000 / 250
Unwired
Fixed Wireless		300 / 25

May also be available: T-Mobile, Verizon.

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