17939 Lamson Rd, Castro Valley, CA 94546 Property Records

Alameda County property record for 17939 Lamson Rd, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,113 sqft · built 1958
Lot Size	0.173 acres (7,546 sqft)
Owner	Individual Name on File
Last Sale	$1,438,000 (May 2026)
Tax Bill	$5,806 (2025)
Deeds & Mortgages	May 2026 Sale & Mortgage Mar 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`84D-1205-4`

Property Details

APN / Parcel Number

Primary APN	`84D-1205-4`
Alternative APN	`084D-1205-004-00`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,113 sqft Living Area

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1959
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	7,546 sqft (0.173 acres)

Location & Zoning

Street Address	17939 LAMSON RD
City	CASTRO VALLEY
State	CA
Zip	94546-1310
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00009 BLK: 000E TR: 1877
Legal Subdivision	38 32
Legal Tract	1877
Legal Block	E
Legal Lot Number	9
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	3
Census Block	3003
Census Tract	430300

Owner

17939 Lamson Rd is owned and occupied by an individual who bought it in May 2026.

Source: Alameda County records, as of October 13, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on File
Mailing Address	17939 LAMSON RD, CASTRO VALLEY, CA 94546-1310
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Husband and Wife

Deeds, Mortgages & Sale History

Date	Document
May 18, 2026	Grant Deed, Transfer · Conventional Mortgage NEW WAVE LENDING GROUP INC
Mar 24, 2017	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 18, 2026 · Amount on File
Deed Sale	May 18, 2026 · Amount on File
Deed Document Number	202665320
Prior Transfer Date	Mar 23, 2017
Prior Transfer Doc	0000069167
Record Updated	Oct 29, 2026

May 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	May 18, 2026
Property Address	17939 LAMSON RD, CASTRO VALLEY, CA 94546-1310
Document Number	0000065320
Instrument Date	May 8, 2026
Instrument	202665320
Transaction Type	Transfer
Record Updated	Jun 26, 2026
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$159,761.80
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	17939 LAMSON RD, CASTRO VALLEY, CA 94546-1310

Mortgage

Document Number	0000065321,
Date	May 18, 2026
Instrument	202665321

Lender

Name	NEW WAVE LENDING GROUP INC

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jun 1, 2056

Interest

Rate Type	Fixed Rate
Rate	6.46%
Initial Type	Fixed Rate
Max Rate	-1%

March 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Mar 24, 2017
Property Address	17939 LAMSON RD, CASTRO VALLEY, CA 94546-1310
Document Number	0000069167
Instrument Date	Mar 23, 2017
Instrument	69167
Transaction Type	Transfer
Record Updated	Apr 6, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer Partial Interest

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	17939 LAMSON RD CASTRO VALLEY CA 945461310, CASTRO VALLEY, CA 94546-1310

Tax Assessment & Valuation

The 2025 property tax bill for 17939 Lamson Rd was $5,806.

Source: Alameda County assessment roll, as of August 5, 2026

Property Jurisdictions

Type	Name
State	California
County	Alameda County
Unified School District	Castro Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$426,917 (+2.03%) Land $163,521 Building $270,396
2025	$5,806.00 Homeowner's exemption	$418,411 Land $160,315 Building $265,096
2023	$5,566.00 Homeowner's exemption	$408,895 Land $154,091 Building $254,804	$1,188,540

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

FEMA maps place 17939 Lamson Rd in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective May 25, 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
Community Rating System	Class 7 (15% premium discount)
Nearby Flood Policies	1 in force

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

Wildfire risk around 17939 Lamson Rd is low, with a 0.06% annual chance of wildfire.

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

Wildfire Risk	Low lower than 62% of the US · lower than 77% of California
Wildfire Likelihood	0.06% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 666 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Sonic Telecom Fiber	10,000 / 10,000
AT&T Fiber · DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20

May also be available: Etheric Networks, T-Mobile, Unwired.

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