3221 Castro St, Martinez, CA 94553 Property Records

Contra Costa County property record for 3221 Castro St, Martinez, CA 94553 · Last verified July 2026

Property Summary

Property Type	Single Family Home
Details	2 bd · 1.5 ba · 1,251 sqft · built 1905
Lot Size	0.103 acres (4,500 sqft)
Owner	Individual Name on File
Last Sale	$200,000 (Aug 2011)
Tax Bill	$3,828 (2025)
Flood Zone	Zone AO (high risk)
APN	`370-253-014-2`

Property Details

APN / Parcel Number

Primary APN	`370-253-014-2`
Alternative APN	`370-253-014`

Interior

Bedrooms	2 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,251 sqft Living Area
1st Floor Area	1,251 sqft

Exterior

Year Built	Built 1905
Effective Year Built	Effective 1912
Lot Area	4,500 sqft (0.103 acres)
Garage Type	Attached
Garage Area	312 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	3221 CASTRO ST
City	MARTINEZ
State	CA
Zip	94553-3257
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	CASTRO ST EXTEN LOT 4 POR 3 BLK 110
Legal Subdivision	CASTRO STREET EXT
Legal Block	110
Legal Lot Number	4
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3007
Census Tract	318000

Owner

Source: Contra Costa County records · APN 370-253-014-2

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	3221 CASTRO ST, MARTINEZ, CA 94553-3257
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Aug 01, 2011 · Amount on Record
Deed Sale	Aug 01, 2011 · Amount on Record
Prior Sale	Apr 02, 2010 · Amount on Record
Deed Document Number	2011151926
Last Transfer Date	Mar 21, 2014
Transfer Doc	0000046796
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		$256,223 (+2%) Land $209,978 Building $46,245
2025	$3,828.00 (+6.54%) Homeowner's exemption	$251,200 (+4.04%) Land $205,861 Building $45,339
2023	$3,593.00 (+1.55%) Homeowner's exemption	$241,447 Land $197,868 Building $43,579
2022	$3,538.00

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 060133180003, 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 109 individual NFIP policies nearby
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 Storm	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

Wildfire

Wildfire Risk	Low above 37% of the US · above 22% of California
Wildfire Likelihood	About 1 in 1,887 per year
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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, availability as of December 31, 2025 · Published October 2026 · based on 422 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
Xfinity	Cable	2,000 / 250
Radiate Holdings	Fiber	1,500 / 1,500
Unwired	Fixed Wireless	300 / 25
Verizon	Fixed Wireless	300 / 20
T-Mobile USA	Fixed Wireless	100 / 20
AT&T	Fixed Wireless	100 / 20
AT&T	DSL	100 / 20

May also be available at this address: AT&T. Availability varies by address; speeds are provider-advertised maximums, not measured.