570 Hemme Ave, Alamo, CA 94507 Property Records

Contra Costa County property record for 570 Hemme Ave, Alamo, CA 94507

Property Summary

Property Type	Rural Home
Lot Size	6.96 acres (303,510 sqft)
Owner	2 Individual Names on Record
Last Sale	$2,000,000 (Sep 2015)
Tax Bill	$3,955 (2025)
Flood Zone	Zone X (minimal risk)
APN	`198-152-012-3`

Property Details

APN / Parcel Number

Primary APN	`198-152-012-3`
Alternative APN	`198-152-012`

Exterior

Lot Area	303,510 sqft

Location & Zoning

Street Address	570 HEMME AVE
City	ALAMO
State	CA
Zip	94507-2114
Property Category	Residential
Property Type	Residential > Single Family > Rural Home
Local Zoning Code	R20
Legal Description	T05153 L000A B
Legal Subdivision	HEMME
Legal Tract	05153
Legal Lot Number	A
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	2
Census Block	2003
Census Tract	345204

Owner

Source: Contra Costa County records, as of July 14, 2026

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

Owner of Record	2 Individual Names on Record
Mailing Address	277 HEMME AVE, ALAMO, CA 94507-2146
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 9, 2015 · Amount on Record
Deed Sale	Sep 9, 2015 · Amount on Record
Deed Document Number	2015188185
Prior Transfer Date	Nov 29, 2007
Prior Transfer Doc	0000001342
Record Updated	Oct 29, 2026

Tax Assessment & Valuation

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Unified School District	San Ramon Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$355,476 (+2%) Land $355,476
2025	$3,955.00 (+3.34%)	$348,506 (+4.04%) Land $348,506
2023	$3,827.00 (+0.71%)	$334,974 Land $334,974
2022	$3,800.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 11 policies
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	11 in force
Nearby Flood Claims	5 (1993–2012)
Claims Outside the SFHA	3 of 5
Most Recent Claim	Dec 2012 · rainfall accumulation

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.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Moderate above 68% of the US · above 42% of California
Wildfire Likelihood	0.2% annual chance
Exposure	Direct burnable vegetation

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source	Surface water
Last State Inspection	Dec 2021
Lead	Under 1 ppb (2022–2024) 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, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 200 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · DSL	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20