623 Main St, Martinez, CA 94553 Property Records

Contra Costa County property record for 623 Main St, Martinez, CA 94553

Property Summary

Property Type	Retail Stores (Personal Services, Photography, Travel)
Details	5,166 sqft · built 1915
Lot Size	0.221 acres (9,640 sqft)
Owner	Individual Name on File
Last Sale	$460,000 (Jul 2001)
Tax Bill	$12,131 (2025)
Flood Zone	Zone AO (high risk)
APN	`373-191-008-3`

Property Details

APN / Parcel Number

Primary APN	`373-191-008-3`
Alternative APN	`373-191-008`

Interior

Stories	1 Story
Building Area	5,166 sqft Gross Area
1st Floor Area	5,166 sqft

Exterior

Year Built	Built 1915
Effective Year Built	Effective 1940
Construction Type	Frame
Roof Type	Flat
Roof Material	Built-Up Asphalt
Lot Area	9,640 sqft (0.221 acres)

Utilities, Heating & Cooling

Heating System	HVAC

Location & Zoning

Street Address	623 MAIN ST
City	MARTINEZ
State	CA
Zip	94553-1128
Property Category	Commercial
Property Type	Commercial > Retail > Retail Stores (Personal Services, Photography, Travel)
Legal Description	ORIGINAL SURVEY LT 7 POR 2,3 & 6 BLK 205
Legal Subdivision	TOWN MARTINEZ
Legal Block	205
Legal Lot Number	7
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1028
Census Tract	316000

Owner

Source: Contra Costa County records · APN 373-191-008-3

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	Individual Name on File
Mailing Address	316 CASTLE CREEK CT, MARTINEZ, CA 94553-9703
Owner Type	Individual
Vesting	Single Person

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Jul 06, 2001 · Amount on Record
Deed Sale	Jul 06, 2001 · Amount on Record
Deed Document Number	2001193343
Prior Transfer Date	Jul 02, 2001
Prior Transfer Doc	0000193342
Record Updated	Sep 20, 2026

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		$753,402 (+2%) Land $226,015 Building $527,387
2025	$12,131.00 (+11.39%)	$738,631 (+4.04%) Land $221,584 Building $517,047
2023	$10,891.00 (-11.01%)	$709,951 Land $212,981 Building $496,970
2022	$12,238.00

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 42 policies
Nearby Flood Policies	42 in force
Nearby Flood Claims	20 (1982–2017)
Claims Outside the SFHA	4 of 20
Most Recent Claim	Jan 2017 · Severe Winter Storms, Flooding, And Mudslides
Claims by Event	Severe Storms, Flooding, Mudslides, And Landslides, Jan 2006 · 3 claims Coastal Storms, Floods, Slides & Tornadoes, Mar 1983 · 5 claims Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 3 claims

Wildfire

Wildfire Risk	Low lower than 64% of the US · lower than 78% of California
Wildfire Likelihood	0.04% 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)
Radiate Holdings Fiber · Cable in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 2,000
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless · DSL	100 / 20
T-Mobile USA Fixed Wireless	100 / 20

Based on FCC filings for 371 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.