300 D St, Union City, CA 94587 Property Records

Alameda County property record for 300 D St, Union City, CA 94587

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,572 sqft · built 1957
Lot Size	0.115 acres (5,000 sqft)
Owner	2 Individual Names on File
Tax Bill	$2,364 (2025)
Deeds & Mortgages	Aug 2026 Mortgage Mar 2024 Second Mortgage + 3 more
Flood Zone	Zone X (minimal risk)
APN	`486-3-49`

Property Details

APN / Parcel Number

Primary APN	`486-3-49`
Alternative APN	`486-0003-049-00`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,572 sqft Living Area

Exterior

Year Built	Built 1957
Effective Year Built	Effective 1959
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	5,000 sqft (0.115 acres)

Location & Zoning

Street Address	300 D ST
City	UNION CITY
State	CA
Zip	94587-2430
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00016 BLK: 0040 MP: 0019 PAGE: 0043
Legal Subdivision	DECOTO
Legal Block	40
Legal Lot Number	16
Jurisdiction	ALAMEDA CA
Township / Civil Division	FREMONT
Census Block Group	4
Census Block	4017
Census Tract	440200

Owner

300 D St is owned and occupied by two individuals.

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

Owner of Record	2 Individual Names on File
Mailing Address	300 D ST, UNION CITY, CA 94587-2430
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

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

Date	Document
Aug 10, 2026	Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC
Mar 7, 2024	Deed of Trust, Mortgage · Stand-Alone Second Mortgage ROCKET MORTGAGE LLC
Feb 8, 2021	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LOANS LLC
Dec 9, 2019	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS
Mar 6, 2018	Deed of Trust, Mortgage · Conventional Mortgage MR COOPER

Assessor's Deed Record

Deed Names	2 Names on Deed
Record Updated	Oct 29, 2026

August 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Recording Date	Aug 10, 2026
Property Address	300 D ST, UNION CITY, CA 94587-2430
Document Number	0000102818
Instrument Date	Aug 5, 2026
Instrument	2026102818
Transaction Type	Mortgage
Record Updated	Sep 28, 2026
Title Company	NONE LISTED ON DOCUMENT

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	300 D ST, UNION CITY, CA 94587-2430

Mortgage

Document Number	0000102818,
Date	Aug 10, 2026
Instrument	2026102818

Lender

Name	ROCKET MORTGAGE LLC

Agreement

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

Interest

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

March 2024: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	300 D ST, UNION CITY, CA 94587-2430
Transaction Type	Mortgage
Record Updated	Apr 15, 2024

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	300 D ST, UNION CITY, CA 94587-2430

Mortgage

Document Number	0000033387
Date	Mar 7, 2024
Instrument	2024033387

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Stand-Alone Second Mortgage
Amount	Amount on Record
Term	240 Months
Due	Mar 1, 2044

February 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	300 D ST, UNION CITY, CA 94587-2430
Transaction Type	Mortgage
Record Updated	Mar 24, 2021
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	300 D ST, UNION CITY, CA 94587-2430

Mortgage

Document Number	0000056175
Date	Feb 8, 2021
Instrument	2021056175

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Mar 1, 2051

December 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	300 D ST, UNION CITY, CA 94587-2430
Document Number	0000260217
Instrument Date	Dec 9, 2019
Transaction Type	Mortgage
Record Updated	Jan 28, 2020
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Husband and Wife
Address	300 D ST UNION CITY CA 945872430, UNION CITY, CA 94587-2430

Mortgage

Document Number	0000260217
Date	Dec 19, 2019
Instrument	260217

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Dec 18, 2049

March 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	300 D ST, UNION CITY, CA 94587-2430
Document Number	0000052400
Instrument Date	Mar 6, 2018
Transaction Type	Mortgage
Record Updated	Mar 27, 2018
Title Company	TITLE 365

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	300 D ST UNION CITY CA 945872430, UNION CITY, CA 94587-2430

Mortgage

Document Number	0000052400
Date	Mar 14, 2018
Instrument	52400

Lender

Name	MR COOPER
Address	DALLAS, TX 75019

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Mar 13, 2048

Tax Assessment & Valuation

The 2025 property tax bill for 300 D St was $2,364 with a homeowner's exemption.

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)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$115,587 (-3.82%) Land $14,464 Building $108,123
2025	$2,364.00 Homeowner's exemption	$120,184 Land $14,181 Building $106,003
2023	$2,823.00 Homeowner's exemption	$115,517 Land $13,630 Building $101,887	$761,400

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

Flood

FEMA maps place 300 D St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1998.

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 Claims	1 (1998)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Feb 1998 · Severe Winter Storms And 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 300 D St is moderate, ranking above 53% of the US, with a 0.1% annual chance of wildfire.

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

Wildfire Risk	Moderate above 53% of the US · lower than 68% of California
Wildfire Likelihood	0.1% 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 583 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
Tekify Fiber & Wireless Fixed Wireless	1,000 / 1,000
RobinsonHSS Fixed Wireless	1,000 / 1,000

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

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