85 Corwin Dr, Alamo, CA 94507 Property Records

Contra Costa County property record for 85 Corwin Dr, Alamo, CA 94507

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 3,627 sqft · built 1955
Lot Size	0.5 acres (21,780 sqft)
Owner	2 Company Names on File
Last Sale	$474,500 (Jul 1998)
Tax Bill	$11,751 (2025)
Deeds & Mortgages	Mar 2018 Transfer
Flood Zone	Zone X (minimal risk)
APN	`198-140-014-4`

Property Details

APN / Parcel Number

Primary APN	`198-140-014-4`
Alternative APN	`198-140-014`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	10 Rooms
Stories	1 Story
Building Area	3,627 sqft Living Area
1st Floor Area	3,627 sqft

Exterior

Year Built	Built 1955
Effective Year Built	Effective 1971
Lot Area	21,780 sqft (0.5 acres)
Garage Type	Attached
Garage Area	483 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	85 CORWIN DR
City	ALAMO
State	CA
Zip	94507-2140
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R20
Legal Description	RO SAN RAMON POR HEMME SUBN .50 AC
Legal Subdivision	HEMME
Legal Lot Number	9,10
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 assessment roll, 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 File
Mailing Address	85 CORWIN DR, ALAMO, CA 94507-2140
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Life Tenant

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jul 31, 1998 · Amount on Record
Deed Sale	Jul 31, 1998 · Amount on Record
Deed Document Number	1998180344
Last Transfer Date	May 9, 2025
Transfer Doc	0000046419
Record Updated	Sep 20, 2026

March 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 27, 2018
Property Address	85 CORWIN DR, ALAMO, CA 94507-2140
Document Number	0000046472
Instrument Date	Jan 31, 2018
Instrument	46472
Transaction Type	Transfer
Record Updated	Apr 4, 2018

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	85 CORWIN DR ALAMO CA 945072140, ALAMO, CA 94507-2140

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		$1,086,327 (+2%) Land $479,710 Building $606,617
2025	$11,751.00 (+3.45%) Homeowner's exemption	$1,065,027 (+4.04%) Land $470,304 Building $594,723
2023	$11,359.00 (+0.73%) Homeowner's exemption	$1,023,673 Land $452,043 Building $571,630
2022	$11,277.00

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 at the parcel

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