303 Warren St, Martinez, CA 94553 Property Records

Contra Costa County property record for 303 Warren St, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 1,095 sqft · built 1918
Lot Size	0.083 acres (3,600 sqft)
Owner	2 Individual Names on File
Last Sale	$385,000 (Sep 2014)
Tax Bill	$6,391 (2025)
Deeds & Mortgages	Aug 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`372-301-011-6`

Property Details

APN / Parcel Number

Primary APN	`372-301-011-6`
Alternative APN	`372-301-011`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,095 sqft Living Area
1st Floor Area	1,095 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1918
Effective Year Built	Effective 1975
Architectural Style	Bungalow
Exterior Material	Wood Siding
Roof Material	Composition Shingle
Lot Area	3,600 sqft (0.083 acres)
Garage Area	160 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	303 WARREN ST
City	MARTINEZ
State	CA
Zip	94553-2434
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	ORIGINAL SURVEY POR LOT 5 BLK 59
Legal Subdivision	MARTINEZ
Legal Block	59
Legal Lot Number	5
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1011
Census Tract	318000

Owner

Source: Contra Costa County records · APN 372-301-011-6

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 Record	2 Individual Names on File
Mailing Address	303 WARREN ST, MARTINEZ, CA 94553-2434
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Sep 04, 2014 · Amount on Record
Deed Sale	Sep 04, 2014 · Amount on Record
Prior Sale	Oct 30, 2013 · Amount on Record
Deed Document Number	2014150127
Last Transfer Date	Sep 26, 2016
Transfer Doc	0000206746
Record Updated	Sep 20, 2026

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	303 WARREN ST, MARTINEZ, CA 94553-2434
Transaction Type	Mortgage
Record Updated	Nov 03, 2022
Title Company	ORANGE COAST TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000168724
Date	Aug 12, 2020
Instrument	2020-168724

Lender

Name	OWNING CORPORATION
Type	Non-Lending Institution
Address	ORANGE, CA 92868

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Aug 01, 2050

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 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

Assessed value is set for property tax purposes and is not a market price estimate.

Year	Tax Bill	Assessed Value
2026		$471,956 (+2%) Land $300,337 Building $171,619
2025	$6,391.00 (+6.46%)	$462,703 (+4.04%) Land $294,449 Building $168,254
2023	$6,003.00 (+1.63%)	$444,737 Land $283,016 Building $161,721
2022	$5,907.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AO, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 23 policies
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	23 in force
Nearby Flood Claims	12 (1980–2022)
Claims Outside the SFHA	3 of 12
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Storms, Flooding, Mudslides, And Landslides, Jan 2006 · 5 claims Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 2 claims

Wildfire

Wildfire Risk	Moderate above 48% of the US · lower than 71% of California
Wildfire Likelihood	0.1% annual chance
Exposure	Indirect 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 as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
AT&T Fiber · DSL	5,000 / 5,000
Xfinity Cable	2,000 / 250
Radiate Holdings Fiber · Cable in parts of the area	1,500 / 1,500
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20

May also be available: Unwired.

Based on FCC filings for 853 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CITY OF MARTINEZ serves 31,015 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.