17050 Roberto St, Castro Valley, CA 94546 Property Records

Alameda County property record for 17050 Roberto St, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 720 sqft · built 1941
Lot Size	0.111 acres (4,815 sqft)
Owner	Individual Name on Record
Last Sale	$635,000 (Oct 2025)
Tax Bill	$9,530 (2025)
Deeds & Mortgages	Oct 2025 Sale & Mortgage Mar 2022 Sale + 1 more
Flood Zone	Zone X (minimal risk)
APN	`80A-234-19`

Property Details

APN / Parcel Number

Primary APN	`80A-234-19`
Alternative APN	`080A-0234-019-00`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	4 Rooms
Stories	1 Story
Building Area	720 sqft Living Area

Exterior

Year Built	Built 1941
Effective Year Built	Effective 1941
Architectural Style	L-Shape
Exterior Material	Wood Siding
Construction Type	Wood
Roof Material	Wood Shingle
Lot Area	4,815 sqft (0.111 acres)
Garage Type	Carport
Carport	Carport

Utilities, Heating & Cooling

Heating System	Floor/Wall Furnace
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	17050 ROBERTO ST
City	CASTRO VALLEY
State	CA
Zip	94546-3849
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00019 BLK: AR: 080A PAGE: 0234
Legal Subdivision	EL PORTAL
Legal Lot Number	518
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	3
Census Block	3018
Census Tract	430500

Owner

Source: Alameda County records, as of August 5, 2026

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

Owner of Record	Individual Name on Record
Mailing Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Single Woman

Deeds, Mortgages & Sale History

Date	Document
Oct 8, 2025	Grant Deed, Transfer DAVID CARLSON
Mar 4, 2022	Grant Deed, Transfer NOT AVAILABLE, DOMA TITLE OF CALIFORNIA INC
Nov 15, 2021	Intrafamily Transfer, Transfer · Reverse Mortgage OPEN MORTGAGE LLC

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 8, 2025 · Amount on Record
Deed Sale	Oct 8, 2025 · Amount on Record
Prior Sale	Mar 4, 2022 · Amount on Record
Deed Document Number	2025125733
Prior Transfer Date	Oct 2, 2025
Prior Transfer Doc	0000125733
Record Updated	Oct 29, 2026

October 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Oct 8, 2025
Property Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849
Document Number	0000125733
Map Reference	MB 8 PG 76
Instrument Date	Oct 2, 2025
Instrument	2025125733
Transaction Type	Transfer
Record Updated	Apr 2, 2026

Transaction

Amount	Amount Recorded
Loan-to-Value (LTV)	LTV on Record
Tax	$698.50
Amount Accuracy	Rounded by County

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849

Mortgage

Document Number	0000125734
Date	Oct 8, 2025
Instrument	2025125734

Lender

Name	DAVID CARLSON
Type	Private Party

Agreement

Amount	Amount Recorded

March 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Mar 4, 2022
Property Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849
Document Number	0000046912
Map Reference	MB 8 PG 76
Instrument Date	Feb 25, 2022
Instrument	2022046912
Transaction Type	Transfer
Record Updated	Mar 25, 2022
Title Company	NOT AVAILABLE, DOMA TITLE OF CALIFORNIA INC

Transaction

Amount	Amount Recorded
Tax	$756.25
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849

November 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Nov 15, 2021
Property Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849
Document Number	0000371306
Map Reference	MB 8 PG 76
Instrument Date	Oct 13, 2021
Instrument	2021371306
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	PLACER TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	17050 ROBERTO ST, CASTRO VALLEY, CA 94546-3849

Mortgage

Document Number	0000371307
Date	Nov 15, 2021
Instrument	2021371307

Lender

Name	OPEN MORTGAGE LLC
Type	Mortgage Company

Agreement

Type	Reverse Mortgage
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Rate	2.23%
Type Change Date	Dec 1, 2021
Change Frequency	Annually
Index	1-Year CMT

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Alameda County
Unified School District	San Lorenzo Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$635,000 (-12.47%) Land $250,000 Building $385,000
2025	$9,530.00 (+13.43%)	$725,467 (+14.79%) Land $217,589 Building $507,878
2023	$8,402.00	$632,000 Land $189,600 Building $442,400	$636,750

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective May 25, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

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

Wildfire Risk	Not rated no burnable land within ember reach

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 796 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 · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250

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

Nearby Properties on Roberto St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures