12 Corwin Dr, Alamo, CA 94507 Property Records

Contra Costa County property record for 12 Corwin Dr, Alamo, CA 94507

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,662 sqft · built 1955
Lot Size	0.5 acres (21,780 sqft)
Owner	2 Company Names on Record
Tax Bill	$2,269 (2025)
Deeds & Mortgages	Jan 2020 Transfer
Flood Zone	Zone X (minimal risk)
APN	`198-140-007-8`

Property Details

APN / Parcel Number

Primary APN	`198-140-007-8`
Alternative APN	`198-140-007`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,662 sqft Living Area
1st Floor Area	1,662 sqft

Exterior

Year Built	Built 1955
Effective Year Built	Effective 1965
Lot Area	21,780 sqft (0.5 acres)
Garage Type	Attached
Garage Area	520 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	12 CORWIN DR
City	ALAMO
State	CA
Zip	94507-2104
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R20
Legal Description	RO SAN RAMON POR LOT 11 HEMME SUBN .50 AC
Legal Subdivision	HEMME SUB
Legal Lot Number	11
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 Company Names on Record
Mailing Address	12 CORWIN DR, ALAMO, CA 94507-2104
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Sep 16, 1994
Transfer Doc	0000232048
Record Updated	Sep 20, 2026

January 2020: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	CONTRA COSTA CA
Recording Date	Jan 31, 2020
Property Address	12 CORWIN DR, ALAMO, CA 94507-2104
Document Number	0000020281
Instrument Date	Jan 22, 2020
Instrument	20281
Transaction Type	Transfer
Record Updated	Feb 17, 2020
Title Company	ATTORNEY ONLY

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	12 CORWIN DR ALAMO CA 945072104, ALAMO, CA 94507-2104

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		$121,918 (+2%) Land $43,727 Building $78,191
2025	$2,269.00 (+4.66%) Homeowner's exemption	$119,528 (+4.04%) Land $42,870 Building $76,658
2023	$2,168.00 (+0.79%) Homeowner's exemption	$114,888 Land $41,206 Building $73,682
2022	$2,151.00

Assessed value is set for property tax purposes and is not a market price estimate.

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 52% of the US · lower than 69% of California
Wildfire Likelihood	0.1% 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