70 Corwin Dr, Alamo, CA 94507 Property Records

Contra Costa County property record for 70 Corwin Dr, Alamo, CA 94507

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,261 sqft · built 1957
Lot Size	0.5 acres (21,780 sqft)
Owner	Company Name on File
Tax Bill	$4,421 (2025)
Deeds & Mortgages	Aug 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`198-140-012-8`

Property Details

APN / Parcel Number

Primary APN	`198-140-012-8`
Alternative APN	`198-140-012`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	1 Story
Building Area	2,261 sqft Living Area
1st Floor Area	2,261 sqft

Exterior

Year Built	Built 1957
Effective Year Built	Effective 1960
Lot Area	21,780 sqft (0.5 acres)
Garage Type	Attached
Garage Area	575 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	70 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 10 HEMME SUBN
Legal Subdivision	HEMME
Legal Lot Number	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 records · APN 198-140-012-8

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	Company Name on File
Mailing Address	70 CORWIN DR, ALAMO, CA 94507-2104
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Transfer Date	Oct 06, 1993
Transfer Doc	0000303719
Record Updated	Sep 20, 2026

August 2017: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	CONTRA COSTA CA
Recording Date	Aug 16, 2017
Property Address	70 CORWIN DR, ALAMO, CA 94507-2104
Document Number	0000147724
Instrument Date	Jul 31, 2017
Instrument	147724
Transaction Type	Transfer
Record Updated	Aug 22, 2017
Title Company	ATTORNEY ONLY

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	70 CORWIN DR ALAMO CA 945072104, ALAMO, CA 94507-2104

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	San Ramon Valley 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		$338,182 (+2%) Land $103,935 Building $234,247
2025	$4,421.00 (+4.24%) Homeowner's exemption	$331,552 (+4.04%) Land $101,898 Building $229,654
2023	$4,241.00 (+0.78%) Homeowner's exemption	$318,679 Land $97,942 Building $220,737
2022	$4,208.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · 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 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

Wildfire

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

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 · DSL	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20

Based on FCC filings for 200 locations within half a mile of this property.

Drinking Water

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

Water System	EAST BAY MUD serves 1,468,000 people
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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.