3170 Castro St, Martinez, CA 94553 Property Records

Contra Costa County property record for 3170 Castro St, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 1,677 sqft · built 2007
Lot Size	0.129 acres (5,619 sqft)
Owner	2 Individual Names on Record
Last Sale	$685,000 (Jun 2019)
Tax Bill	$9,854 (2025)
Deeds & Mortgages	Apr 2024 Line of Credit Aug 2021 Line of Credit + 3 more
Flood Zone	Zone AO (high risk)
APN	`370-251-019-3`

Property Details

APN / Parcel Number

Primary APN	`370-251-019-3`
Alternative APN	`370-251-019`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	10 Rooms
Stories	1 Story
Building Area	1,677 sqft Living Area
1st Floor Area	1,677 sqft

Exterior

Year Built	Built 2007
Effective Year Built	Effective 2008
Lot Area	5,619 sqft (0.129 acres)
Garage Type	Attached
Garage Area	492 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	3170 CASTRO ST
City	MARTINEZ
State	CA
Zip	94553-3222
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T199PM11 PCL 2
Legal Subdivision	MINOR SUB 551-06
Legal Tract	199PM11
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3008
Census Tract	318000

Owner

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

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on Record
Mailing Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Apr 8, 2024	Deed of Trust, Mortgage · Line of Credit UNITED WHOLESALE MORTGAGE
Aug 5, 2021	Deed of Trust, Mortgage · Line of Credit FREMONT BANK
May 20, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE
Jun 4, 2019	Grant Deed, Transfer · Conventional with PMI QUICKEN LNS
Jun 4, 2019	Quit Claim Deed, Transfer OLD REPUBLIC TITLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 4, 2019 · Amount on Record
Deed Sale	Jun 4, 2019 · Amount on Record
Prior Sale	Dec 28, 2012 · Amount on Record
Deed Document Number	201982407
Last Transfer Date	May 11, 2021
Transfer Doc	0000150119
Record Updated	Oct 29, 2026

April 2024: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222
Transaction Type	Mortgage
Record Updated	Apr 17, 2024
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE CO

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222

Mortgage

Document Number	0000032065
Date	Apr 8, 2024
Instrument	2024-032065

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2054

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

August 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	SERVICELINK

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222

Mortgage

Document Number	0000218860
Date	Aug 5, 2021
Instrument	2021-218860

Lender

Name	FREMONT BANK
Type	Bank
Address	LIVERMORE, CA 94551

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Aug 1, 2051

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	May 20, 2021
Property Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222
Document Number	0000150119
Map Reference	MB 199 PG 11
Instrument Date	May 11, 2021
Instrument	2021-150119
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222

Mortgage

Document Number	0000150120
Date	May 20, 2021
Instrument	2021-150120

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jun 1, 2051

June 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 4, 2019
Property Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222
Document Number	0000082407
Instrument Date	May 31, 2019
Instrument	82407
Transaction Type	Transfer
Record Updated	Jun 18, 2019
Title Company	OLD REPUBLIC TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$753.50
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	3170 CASTRO ST MARTINEZ CA 945533222, MARTINEZ, CA 94553-3222

Mortgage

Document Number	82409
Date	Jun 4, 2019
Instrument	82409

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional with PMI
Amount	Amount Recorded
Term	360 Months
Due	Jun 3, 2049

June 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 4, 2019
Property Address	3170 CASTRO ST, MARTINEZ, CA 94553-3222
Document Number	0000082408
Instrument Date	May 29, 2019
Instrument	82408
Transaction Type	Transfer
Record Updated	Jun 18, 2019
Title Company	OLD REPUBLIC TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	3170 CASTRO ST MARTINEZ CA 945533222, MARTINEZ, CA 94553-3222

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Martinez City
Unified School District	Martinez Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$779,406 (+2%) Land $432,371 Building $347,035
2025	$9,854.00 (+6.51%) Homeowner's exemption	$764,125 (+4.04%) Land $423,894 Building $340,231
2023	$9,252.00 (+1.69%) Homeowner's exemption	$734,455 Land $407,435 Building $327,020
2022	$9,098.00

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 Zone	Zone AO high risk · sheet flow 1–3 ft
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	Varies along the reach; see FIRM
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on Record median of 109 policies
Nearby Flood Policies	109 in force
Nearby Flood Claims	32 (1980–2019)
Claims Outside the SFHA	3 of 32
Most Recent Claim	Feb 2019
Claims by Event	Severe Storms, Flooding, Mudslides, And Landslides, Jan 2006 · 12 claims Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 5 claims Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 6 claims

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 Risk	Moderate above 59% of the US · lower than 64% of California
Wildfire Likelihood	0.2% annual chance
Exposure	Indirect 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 System	CITY OF MARTINEZ serves 31,015 people · EPA ID CA0710006
Water Source	Purchased surface water from CONTRA COSTA WATER DISTRICT
Last State Inspection	Oct 2025
Lead	Under 1 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None 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 358 locations within half a mile, as of December 31, 2025

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

May also be available: Unwired.

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