4010 Marsten Ave, Union City, CA 94587 Property Records

Alameda County property record for 4010 Marsten Ave, Union City, CA 94587

Property Summary

Property Type	Government / Public Use
Details	2 bd · 2 ba · 10,500 sqft · built 1933
Lot Size	0.246 acres (10,711 sqft)
Owner	Company Name on File
Flood Zone	Zone AE (high risk)
APN	`482-30-35-1`

Property Details

APN / Parcel Number

Primary APN	`482-30-35-1`
Alternative APN	`482-0030-035-01`

Interior

Bedrooms	2 Beds
Full Baths	2 Baths
Total Rooms	5 Rooms
Building Area	10,500 sqft

Exterior

Year Built	Built 1933
Effective Year Built	Effective 1933
Construction Type	Frame
Lot Area	10,711 sqft (0.246 acres)

Location & Zoning

Street Address	4010 MARSTEN AVE
City	UNION CITY
State	CA
Zip	94587-2505
Property Category	Public Works
Property Type	Public Works > Government / Public Use
Legal Description	LOT: 0000A BLK: TR: 6071
Legal Tract	6071
Legal Lot Number	A
Jurisdiction	ALAMEDA CA
Township / Civil Division	FREMONT
Census Block Group	1
Census Block	1006
Census Tract	440331

Owner

4010 Marsten Ave, a public works property, is owned by a company.

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

Owner of Record	Company Name on File
Mailing Address	34009 ALVARADO NILES RD, UNION CITY, CA 94587-4452
Owner Type	Company

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

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

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

Property Jurisdictions

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

Flood

FEMA maps place 4010 Marsten Ave in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.

Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone AE high risk
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	10.0 ft
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on File median of 23 individual policies
Nearby Flood Policies	25 units insured incl. 2 condo units
Nearby Flood Claims	1 (1986)
Most Recent Claim	Mar 1986 · Severe Storms & Flooding

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 4010 Marsten Ave is low, with a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	Indirect 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	ALAMEDA COUNTY WATER DISTRICT serves 344,000 people · EPA ID CA0110001
Water Source	Surface water
Last State Inspection	Nov 2025
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 621 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · 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
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20