421 Jones St, Martinez, CA 94553 Property Records

Contra Costa County property record for 421 Jones St, Martinez, CA 94553

Property Summary

Property Type	Triplex
Details	2,574 sqft · built 1941
Lot Size	0.115 acres (5,000 sqft)
Owner	2 Company Names on File
Tax Bill	$4,013 (2025)
Deeds & Mortgages	Nov 2020 Transfer
Flood Zone	Zone AO (high risk)
APN	`372-321-007`

Property Details

APN / Parcel Number

Primary APN	`372-321-007`
Alternative APN	`372-321-007-0`

Interior

Total Rooms	3 Rooms
Stories	1 Story
Building Area	2,574 sqft Living Area
1st Floor Area	2,574 sqft

Exterior

Year Built	Built 1941
Effective Year Built	Effective 1941
Architectural Style	Triplex
Lot Area	5,000 sqft (0.115 acres)
Parking Spaces	3 Parking Spaces

Location & Zoning

Street Address	421 JONES ST, 431
City	MARTINEZ
State	CA
Zip	94553-2422
Property Category	Residential
Property Type	Residential > Multi-Unit > Triplex
Legal Description	ORIGINAL SURVEY POR 7&8 51
Legal Subdivision	MARTINEZ
Legal Block	51
Legal Lot Number	7,8
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	2
Census Block	2013
Census Tract	317000

Owner

Source: Contra Costa County records · APN 372-321-007

Assessment roll updated July 14, 2026 · Last verified August 2026

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

Owner of Record	2 Company Names on File
Mailing Address	3732 ELM AVE, LONG BEACH, CA 90807-3402
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Transfer Date	Dec 11, 2024
Transfer Doc	0000133670
Record Updated	Sep 20, 2026

November 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 05, 2020
Property Address	421 JONES ST, MARTINEZ, CA 94553-2422
Document Number	0000264611
Instrument Date	Oct 04, 2020
Instrument	264611
Transaction Type	Transfer
Record Updated	Nov 16, 2020
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	421 JONES ST #431 MARTINEZ CA 945532422, 431, MARTINEZ, CA 94553-2422

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified August 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		$149,440 (+2%) Land $44,821 Building $104,619
2025	$4,013.00 (+2.92%)	$146,511 (+4.04%) Land $43,943 Building $102,568
2023	$3,899.00 (-1.71%)	$140,824 Land $42,238 Building $98,586
2022	$3,967.00

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 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 70 policies
Nearby Flood Policies	70 in force
Nearby Flood Claims	51 (1980–2018)
Claims Outside the SFHA	1 of 51
Most Recent Claim	Sep 2018
Claims by Event	Severe Winter Storms, Flooding, And Mudslides, Feb 2017 · 6 claims Severe Storms, Flooding, Mudslides, And Landslides, Dec 2005 · 12 claims Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 9 claims

Wildfire

Wildfire Risk	Moderate above 66% of the US · above 41% of California
Wildfire Likelihood	0.3% annual chance
Exposure	Direct burnable vegetation at the parcel

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)
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
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Unwired.

Based on FCC filings for 348 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.