640 Ross Cir, Martinez, CA 94553 Property Records

Contra Costa County property record for 640 Ross Cir, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 1,805 sqft · built 2000
Lot Size	0.101 acres (4,399 sqft)
Owner	Individual Name on File
Last Sale	$260,000 (Aug 2000)
Tax Bill	$5,785 (2025)
Flood Zone	Zone X (minimal risk)
APN	`380-170-022-4`

Property Details

APN / Parcel Number

Primary APN	`380-170-022-4`
Alternative APN	`380-170-022`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	1,805 sqft Living Area
1st Floor Area	776 sqft
2nd Floor Area	1,029 sqft

Exterior

Year Built	Built 2000
Effective Year Built	Effective 2000
Lot Area	4,399 sqft (0.101 acres)
Garage Type	Attached
Garage Area	423 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	640 ROSS CIR
City	MARTINEZ
State	CA
Zip	94553-2251
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	P1
Legal Description	T7503 L29
Legal Tract	7503
Legal Lot Number	29
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	2
Census Block	2001
Census Tract	320001

Owner

Source: Contra Costa County records · APN 380-170-022-4

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	Individual Name on File
Mailing Address	3430 ROSSMOOR PKWY, 3, WALNUT CREEK, CA 94595-3818
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Aug 25, 2000 · Amount on Record
Deed Sale	Aug 25, 2000 · Amount on Record
Deed Document Number	2000183297
Last Transfer Date	Feb 24, 2016
Transfer Doc	0000033616
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
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		$409,582 (+2%) Land $122,946 Building $286,636
2025	$5,785.00 (+7.35%)	$401,552 (+4.04%) Land $120,536 Building $281,016
2023	$5,389.00 (+2.88%)	$385,960 Land $115,856 Building $270,104
2022	$5,238.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), as of October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133200012, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 22 policies
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	22 in force
Nearby Flood Claims	11 (1986–2022)
Claims Outside the SFHA	2 of 11
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Dec 2022 · 4 claims Severe Winter Storms, Flooding, And Mudslides, Feb 2017 · 2 claims

Wildfire

Wildfire Risk	Low lower than 99.8% of the US · lower than 99.8% of California
Wildfire Likelihood	Under 0.01% annual chance
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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20

May also be available: Radiate Holdings.

Based on FCC filings for 497 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system CA0710003, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CONTRA COSTA WATER DISTRICT serves 210,500 people
Water Source	Surface water
Last State Inspection	Jan 2022
Lead	Under 1 ppb (2026–2028) 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.