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3620 Serrano St, Martinez, CA 94553 Property Records

Contra Costa County property record for 3620 Serrano St, Martinez, CA 94553

Property Summary

Property TypeSingle Family Home
Details8 bd · 2 ba · 3,054 sqft · built 1932
Lot Size0.156 acres (6,800 sqft)
OwnerIndividual Name on File
Last Sale$224,500 (Sep 1997)
Tax Bill$5,093 (2025)
Deeds & MortgagesApr 2024 Line of Credit
Mar 2021 Mortgage
Flood ZoneZone X (minimal risk)
APN370-094-020-2

Property Details

APN / Parcel Number

Primary APN370-094-020-2
Alternative APN
  • 370-094-020

Interior

Bedrooms8 Beds
Full Baths2 Baths
Total Rooms14 Rooms
Stories2 Stories
Building Area3,054 sqft Living Area
1st Floor Area995 sqft
2nd Floor Area1,157 sqft
Basement Area902 sqft

Exterior

Year BuiltBuilt 1932
Effective Year BuiltEffective 1950
Lot Area6,800 sqft (0.156 acres)
Garage TypeAttached
Garage Area306 sqft
Parking Spaces1 Parking Space

Location & Zoning

Street Address3620 SERRANO ST
CityMARTINEZ
StateCA
Zip94553-3751
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR1
Legal DescriptionALTA LOMA POR LOTS 38,39 & 40
Legal SubdivisionALTA LOMA
Legal Lot Number38
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group2
Census Block2016
Census Tract318000

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 RecordIndividual Name on File
Mailing Address3620 SERRANO ST, MARTINEZ, CA 94553-3751
OccupancyOwner Occupied
Owner TypeIndividual
VestingSingle Person

Deeds, Mortgages & Sale History

DateDocument
Apr 26, 2024Deed of Trust, Mortgage · Line of Credit
GTE FCU
Mar 17, 2021Deed of Trust, Mortgage · Conventional Mortgage
CMG MORTGAGE INC

Assessor's Deed Record

Deed NamesName on Deed
Last SaleSep 25, 1997 · Amount on File
Deed SaleSep 25, 1997 · Amount on File
Deed Document Number1997177350
Last Transfer DateAug 10, 2005
Transfer Doc0000310256
Record UpdatedSep 20, 2026

April 2024: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCONTRA COSTA CA
Property Address3620 SERRANO ST, MARTINEZ, CA 94553-3751
Transaction TypeMortgage
Record UpdatedMay 7, 2024

Transferred To (Grantee/Buyer)

NameVerified Name
Address3620 SERRANO ST, MARTINEZ, CA 94553-3751

Mortgage

Document Number0000039064
DateApr 26, 2024
Instrument2024-039064
Lender
NameGTE FCU
TypeCredit Union
AddressTAMPA, FL 33602
Agreement
TypeLine of Credit
AmountAmount on Record
Term360 Months
DueApr 25, 2054
Interest
Rate TypeAdjustable Rate
Change FrequencyMonthly

March 2021: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionCONTRA COSTA CA
Property Address3620 SERRANO ST, MARTINEZ, CA 94553-3751
Transaction TypeMortgage
Record UpdatedNov 3, 2022
Title CompanyFIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

NameVerified Name
Address3620 SERRANO ST, MARTINEZ, CA 94553-3751

Mortgage

Document Number0000081204
DateMar 17, 2021
Instrument2021-081204
Lender
NameCMG MORTGAGE INC
TypeMortgage Company
AddressSAN RAMON, CA 94583
Agreement
TypeConventional Mortgage
AmountAmount on Record
Term359 Months
DueFeb 1, 2051

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityMartinez City
Unified School DistrictMartinez Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$365,611 (+2%) Land $133,537 Building $232,074
2025$5,093.00 (+6.53%) Homeowner's exemption$358,443 (+4.04%) Land $130,919 Building $227,524
2023$4,781.00 (+1.62%) Homeowner's exemption$344,526 Land $125,836 Building $218,690
2022$4,705.00

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 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies3 in force
Nearby Flood Claims5 (1982–2017)
Claims Outside the SFHA4 of 5
Most Recent ClaimJan 2017 · Severe Winter Storms, Flooding, And Mudslides

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

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

Wildfire RiskHigh
above 74% of the US · above 49% of California
Wildfire Likelihood0.4% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 MARTINEZ
serves 31,015 people · EPA ID CA0710006
Water SourcePurchased surface water from CONTRA COSTA WATER DISTRICT
Last State InspectionOct 2025
LeadUnder 1 ppb (2023–2025)
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 335 locations within half a mile, as of December 31, 2025

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

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