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481 William Way, Martinez, CA 94553 Property Records

Contra Costa County property record for 481 William Way, Martinez, CA 94553 · Last verified July 2026

Property Summary

Property TypeSingle Family Home
Details3 bd · 2.5 ba · 2,111 sqft · built 2023
Lot Size0.178 acres (7,751 sqft)
Owner2 Individual Names on File
Last Sale$1,119,000 (Sep 2023)
Tax Bill$17,370 (2025)
Deeds & MortgagesSep 2023 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN162-580-029-5

Property Details

APN / Parcel Number

Primary APN162-580-029-5
Alternative APN
  • 162-580-029

Interior

Bedrooms3 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms8 Rooms
Stories1 Story
Building Area2,111 sqft Living Area
1st Floor Area2,111 sqft

Exterior

Year BuiltBuilt 2023
Effective Year BuiltEffective 2023
Lot Area7,751 sqft (0.178 acres)
Garage TypeAttached
Garage Area441 sqft
Parking Spaces2 Parking Spaces

Location & Zoning

Street Address481 WILLIAM WAY
CityMARTINEZ
StateCA
Zip94553-4752
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionT9358 L29
Legal SubdivisionTRADITIONS/THE MDW SUB 9358
Legal Tract9358
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group3
Census Block3014
Census Tract321101

Owner

Source: Contra Costa County records · APN 162-580-029-5

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 Address481 WILLIAM WAY, MARTINEZ, CA 94553-4752
OccupancyOwner Occupied
Owner TypeIndividual
VestingTenants in Common

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleSep 26, 2023 · Amount on Record
Deed SaleSep 26, 2023 · Amount on Record
Deed Document Number202392772
Record UpdatedSep 20, 2026

September 2023: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateSep 26, 2023
Property Address481 WILLIAM WAY, MARTINEZ, CA 94553-4752
Document Number0000092772
Map ReferenceMB 548 PG 21
Instrument DateAug 16, 2023
Instrument2023-092772
Transaction TypeTransfer
Record UpdatedOct 05, 2023
Title CompanyOLD REPUBLIC TITLE, OLD REPUBLIC 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
RelationshipTenants in Common
Address481 WILLIAM WAY, MARTINEZ, CA 94553-4752

Mortgage

Document Number0000092773
DateSep 26, 2023
Instrument2023-092773
Lender
NameROCKET MORTGAGE LLC
TypeMortgage Company
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term361 Months
DueOct 01, 2053

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
MunicipalityMartinez City
Unified School DistrictMount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

YearTax BillAssessed Value
2026$1,163,687 (+2%) Land $624,760 Building $538,927
2025$17,370.00 (+218.83%) Homeowner's exemption$1,140,870 (+429.71%) Land $612,510 Building $528,360
2023$5,448.00 (+193.85%)$215,377 Land $215,377
2022$1,854.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133211013, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood ZoneZone X
Special Flood Hazard AreaNo
Flood HazardMinimal
500-Year FloodplainNo
Nearby Flood Policies1 in force

Wildfire

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

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.

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 528 locations within about half a mile of this property

ProviderTechnologyDownload / Upload (Mbps)
XfinityCable2,000 / 250
Radiate HoldingsFiber1,500 / 1,500
UnwiredFixed Wireless300 / 25
T-Mobile USAFixed Wireless100 / 20
AT&TDSL100 / 20

May also be available at this address: AT&T, Radiate Holdings. Availability varies by address; speeds are provider-advertised maximums, not measured.

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