828 Main St, Martinez, CA 94553 Property Records

Contra Costa County property record for 828 Main St, Martinez, CA 94553 · Last verified July 2026

Property Summary

Property Type	Commercial Office
Details	6,940 sqft · built 1927
Lot Size	0.163 acres (7,100 sqft)
Owner	2 Company Names on File
Last Sale	$335,000 (Mar 1997)
Tax Bill	$7,898 (2025)
Flood Zone	Zone AO (high risk)
APN	`373-162-005-4`

Property Details

APN / Parcel Number

Primary APN	`373-162-005-4`
Alternative APN	`373-162-005`

Interior

Stories	1 Story
Building Area	6,940 sqft Gross Area
1st Floor Area	6,940 sqft

Exterior

Year Built	Built 1927
Effective Year Built	Effective 1935
Lot Area	7,100 sqft (0.163 acres)

Location & Zoning

Street Address	828 MAIN ST, 836
City	MARTINEZ
State	CA
Zip	94553-1226
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Legal Description	ADDL SURVEY LOT 1 POR 2 BLK 324
Legal Subdivision	MARTINEZ
Legal Block	324
Legal Lot Number	1
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1031
Census Tract	316000

Owner

Source: Contra Costa County records · APN 373-162-005-4

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 Company Names on File
Mailing Address	50 CRESTVIEW DR, ORINDA, CA 94563-3920
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Mar 25, 1997 · Amount on Record
Deed Sale	Mar 25, 1997 · Amount on Record
Deed Document Number	199747555
Last Transfer Date	Oct 23, 2000
Transfer Doc	0000250893
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		$581,453 (+2%) Land $166,113 Building $415,340
2025	$7,898.00 (+5.49%)	$570,053 (+4.04%) Land $162,856 Building $407,197
2023	$7,487.00 (-0.13%)	$547,919 (+2%) Land $156,533 Building $391,386
2022	$7,497.00	$537,176 Land $153,464 Building $383,712

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133160001, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone AO sheet flow 1–3 ft
Special Flood Hazard Area	Yes
Flood Hazard	High
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	Varies along the reach; see FIRM
Flood Insurance Requirement	Required (federally backed mortgages)
Flood Insurance Cost	Premium on Record median of 42 individual NFIP policies nearby
Nearby Flood Policies	42 in force 9 of 42 on primary residences
Nearby Flood Claims	20 (1982–2017)
Claims Outside the SFHA	4 of 20
Most Recent Claim	Jan 2017, rainfall accumulation, Severe Winter Storms, Flooding, And Mudslides
Flood Events	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	Not rated no burnable land in reach
Wildfire Likelihood	Negligible
Exposure	None beyond 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.