550 Bertola St, Martinez, CA 94553 Property Records

Contra Costa County property record for 550 Bertola St, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 1,391 sqft · built 1952
Lot Size	0.103 acres (4,500 sqft)
Owner	2 Individual Names on Record
Tax Bill	$5,017 (2025)
Deeds & Mortgages	Sep 2023 Transfer Feb 2021 Transfer
Flood Zone	Zone AO (high risk)
APN	`372-211-015-6`

Property Details

APN / Parcel Number

Primary APN	`372-211-015-6`
Alternative APN	`372-211-015`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,391 sqft Living Area
1st Floor Area	1,391 sqft

Exterior

Year Built	Built 1952
Effective Year Built	Effective 1952
Lot Area	4,500 sqft (0.103 acres)
Garage Type	Attached
Garage Area	215 sqft
Parking Spaces	1 Parking Space

Location & Zoning

Street Address	550 BERTOLA ST
City	MARTINEZ
State	CA
Zip	94553-3243
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	BERTOLA TRACT POR 5&6187
Legal Subdivision	BERTOLA
Legal Block	187
Legal Lot Number	5,6
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3003
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	550 BERTOLA ST, MARTINEZ, CA 94553-3243
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Sep 28, 2023	Affidavit of Death of Joint Tenant, Transfer
Feb 1, 2021	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Sep 22, 2023
Transfer Doc	0000093718
Record Updated	Sep 20, 2026

September 2023: Affidavit of Death of Joint Tenant, Transfer

Document Type	Affidavit of Death of Joint Tenant
Jurisdiction	CONTRA COSTA CA
Recording Date	Sep 28, 2023
Property Address	550 BERTOLA ST, MARTINEZ, CA 94553-3243
Document Number	0000093718
Map Reference	MB 23 PG 686&687
Instrument Date	Sep 12, 2023
Instrument	2023-093718
Transaction Type	Transfer
Record Updated	Oct 9, 2023

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Severalty

February 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Feb 1, 2021
Property Address	550 BERTOLA ST, MARTINEZ, CA 94553-3243
Document Number	0000030389
Map Reference	MB 23 PG 686&687
Instrument Date	Jan 11, 2021
Instrument	2021-030389
Transaction Type	Transfer
Record Updated	Nov 3, 2022

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
Address	511 VINE HILL WAY, MARTINEZ, CA 94553-5362

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		$352,456 (+2%) Land $275,962 Building $76,494
2025	$5,017.00 (+229.85%)	$345,546 (+4.04%) Land $270,551 Building $74,995
2023	$1,521.00 (+1.26%) Homeowner's exemption	$332,131 Land $260,047 Building $72,084
2022	$1,502.00

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 43% of the US · lower than 74% of California
Wildfire Likelihood	0.08% annual chance
Exposure	Direct burnable vegetation

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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