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820 Main St, Martinez, CA 94553 Property Records

Contra Costa County property record for 820 Main St, Martinez, CA 94553 · Last verified July 2026

Property Summary

Property TypeRetail Stores (Personal Services, Photography, Travel)
Details5,850 sqft · built 1904
Lot Size0.089 acres (3,861 sqft)
OwnerCompany Name on File
Tax Bill$2,430 (2025)
Deeds & MortgagesDec 2017 Transfer
Flood ZoneZone AO (high risk)
APN373-162-004-7

Property Details

APN / Parcel Number

Primary APN373-162-004-7
Alternative APN
  • 373-162-004

Interior

Total Rooms4 Rooms
Stories1 Story
Building Area5,850 sqft Gross Area
1st Floor Area5,850 sqft

Exterior

Year BuiltBuilt 1904
Effective Year BuiltEffective 1934
Lot Area3,861 sqft (0.089 acres)

Location & Zoning

Street Address820 MAIN ST, 826
CityMARTINEZ
StateCA
Zip94553-1226
Property CategoryCommercial
Property TypeCommercial > Retail > Retail Stores (Personal Services, Photography, Travel)
Legal DescriptionADDL SURVEY POR LOT 2 BLK 324
Legal SubdivisionMARTINEZ
Legal Block324
Legal Lot Number2
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group1
Census Block1031
Census Tract316000

Owner

Source: Contra Costa County records · APN 373-162-004-7

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 RecordCompany Name on File
Mailing AddressPO BOX 747, MARTINEZ, CA 94553-0074
Owner TypeCompany
VestingPartnership

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed NamesVerified Name on Deed
Last Transfer DateFeb 20, 2007
Transfer Doc0000081401
Record UpdatedSep 20, 2026

December 2017: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionCONTRA COSTA CA
Recording DateDec 22, 2017
Property Address820 MAIN ST, MARTINEZ, CA 94553-1226
Document Number0000240872
Instrument DateJun 06, 2017
Instrument240872
Transaction TypeTransfer
Record UpdatedJan 03, 2018

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipLimited Partnership
AddressPO BOX 747 MARTINEZ CA 945530074, MARTINEZ, CA 94553-0074

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 DistrictMartinez 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$129,955 (+2%) Land $46,227 Building $83,728
2025$2,430.00 (+4.02%)$127,408 (+4.04%) Land $45,321 Building $82,087
2023$2,336.00 (-0.3%)$122,462 Land $43,562 Building $78,900
2022$2,343.00

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 060133160001, 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 AO
sheet flow 1–3 ft
Special Flood Hazard AreaYes
Flood HazardHigh
100-Year FloodplainYes
1% annual chance
FloodwayNo
Base Flood ElevationVaries along the reach; see FIRM
Flood Insurance RequirementRequired (federally backed mortgages)
Flood Insurance CostPremium on Record
median of 42 individual NFIP policies nearby
Nearby Flood Policies42 in force
Nearby Flood Claims20 (1982–2017)
Claims Outside the SFHA4 of 20
Most Recent ClaimJan 2017, rainfall accumulation, Severe Winter Storms, Flooding, And Mudslides
Claims By Storm
  • Severe Storms, Flooding, Mudslides, And Landslides, Jan 2006 · 3 claims
  • Coastal Storms, Floods, Slides & Tornadoes, Mar 1983 · 5 claims
  • Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 3 claims

Wildfire

Wildfire RiskLow
above 36% of the US · above 21% of California
Wildfire LikelihoodAbout 1 in 2,500 per year
ExposureIndirect
within 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 371 locations within about half a mile of this property

ProviderTechnologyDownload / Upload (Mbps)
Radiate HoldingsFiber5,000 / 5,000
XfinityCable2,000 / 2,000
UnwiredFixed Wireless300 / 25
VerizonFixed Wireless300 / 20
AT&TFixed Wireless100 / 20
T-Mobile USAFixed Wireless100 / 20
AT&TDSL100 / 20

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

Mobile Coverage

5G and 4G LTE

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