643 Rossmore Ln, Hayward, CA 94544 Property Records

Alameda County property record for 643 Rossmore Ln, Hayward, CA 94544

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,153 sqft · built 1958
Lot Size	0.116 acres (5,040 sqft)
Owner	Individual Name on Record
Tax Bill	$1,826 (2025)
Deeds & Mortgages	May 2018 Transfer
Flood Zone	Zone X (minimal risk)
APN	`443-55-58`

Property Details

APN / Parcel Number

Primary APN	`443-55-58`
Alternative APN	`443-0055-058-00`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,153 sqft Living Area

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1959
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	5,040 sqft (0.116 acres)

Location & Zoning

Street Address	643 ROSSMORE LN
City	HAYWARD
State	CA
Zip	94544-1729
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00004 BLK: 000C TR: 1724
Legal Tract	1724
Legal Block	C
Legal Lot Number	4
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	2
Census Block	2010
Census Tract	436800

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	26579 PARKSIDE DR, HAYWARD, CA 94542-1632
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Transfer Date	Apr 13, 2011
Transfer Doc	0000124234
Record Updated	Sep 20, 2026

May 2018: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	ALAMEDA CA
Recording Date	May 25, 2018
Property Address	643 ROSSMORE LN, HAYWARD, CA 94544-1729
Document Number	0000104544
Instrument Date	Jan 4, 2018
Instrument	104544
Transaction Type	Transfer
Record Updated	Jun 14, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	26579 PARKSIDE DR HAYWARD CA 945421632, HAYWARD, CA 94542-1632

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Alameda County
Municipality	Hayward City
Unified School District	Hayward Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$126,023 (-3.37%) Land $71,403 Building $61,620
2025	$1,826.00 (+2.41%) Homeowner's exemption	$130,415 (+4.04%) Land $70,003 Building $60,412
2023	$1,783.00 Homeowner's exemption	$125,351 Land $67,285 Building $58,066	$705,870

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 · 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
Nearby Flood Policies	2 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

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

Wildfire Risk	Low lower than 99.1% of the US · lower than 99.2% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond 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	CITY OF HAYWARD serves 162,954 people · EPA ID CA0110006
Water Source	Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM
Last State Inspection	Mar 2025
Lead	Under 1 ppb (2023–2025) 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 714 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
RobinsonHSS Fixed Wireless	1,000 / 1,000
Tekify Fiber & Wireless Fixed Wireless	570 / 120
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks, Sonic Telecom.

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