4210 Comet Cir, Union City, CA 94587 Property Records

Alameda County property record for 4210 Comet Cir, Union City, CA 94587

Property Summary

Property Type	Townhouse
Details	4 bd · 1.5 ba · 1,342 sqft · built 1972
Lot Size	0.034 acres (1,474 sqft)
Owner	Individual Name on File
Last Sale	$765,000 (Oct 2025)
Tax Bill	$5,306 (2025)
Deeds & Mortgages	Oct 2025 Transfer Oct 2025 Sale & Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`483-102-18`

Property Details

APN / Parcel Number

Primary APN	`483-102-18`
Alternative APN	`483-0102-018-00`

Interior

Bedrooms	4 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	6 Rooms
Stories	2 Stories
Building Area	1,342 sqft Living Area

Exterior

Year Built	Built 1972
Effective Year Built	Effective 1973
Architectural Style	Custom Design
Exterior Material	Stucco
Construction Type	Wood
Roof Material	Composition Shingle
Lot Area	1,474 sqft (0.034 acres)

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	4210 COMET CIR
City	UNION CITY
State	CA
Zip	94587-4026
Property Category	Residential
Property Type	Residential > Condominium / Townhouse > Townhouse
Local Zoning Code	PD
Legal Description	LOT: 00084 BLK: TR: 3307
Legal Subdivision	TR 3307
Legal Tract	3307
Legal Lot Number	84
Jurisdiction	ALAMEDA CA
Township / Civil Division	FREMONT
Census Block Group	1
Census Block	1011
Census Tract	440306

Owner

4210 Comet Cir, a townhouse, is owned and occupied by an individual who bought it in October 2025.

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

Owner of Record	Individual Name on File
Mailing Address	4210 COMET CIR, UNION CITY, CA 94587-4026
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Sole Owner

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
Oct 7, 2025	Intrafamily Transfer, Transfer CHICAGO TITLE COMPANY
Oct 7, 2025	Grant Deed, Transfer · Conventional Mortgage CAL COAST FINANCIAL CORP
Apr 19, 2022	Transfer on Death Deed, Transfer
Apr 19, 2022	Transfer on Death Deed, Transfer

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 7, 2025 · Amount on File
Deed Sale	Oct 7, 2025 · Amount on File
Prior Sale	Jun 29, 2000 · Amount on File
Deed Document Number	2025125255
Prior Transfer Date	Apr 12, 2022
Prior Transfer Doc	0000077750
Record Updated	Oct 29, 2026

October 2025: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Oct 7, 2025
Property Address	CA
Document Number	0000125256
Map Reference	MB 74 PG 5
Instrument Date	Oct 6, 2025
Instrument	2025125256
Transaction Type	Transfer
Record Updated	Nov 3, 2025
Title Company	CHICAGO TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	4210 COMET CIR, UNION CITY, CA 94587-4026

October 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Oct 7, 2025
Property Address	CA
Document Number	0000125255
Map Reference	MB 74 PG 5
Instrument Date	Sep 30, 2025
Instrument	2025125255
Transaction Type	Transfer
Record Updated	Nov 3, 2025
Title Company	CHICAGO TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	4210 COMET CIR, UNION CITY, CA 94587-4026

Mortgage

Document Number	0000125257
Date	Oct 7, 2025
Instrument	2025125257

Lender

Name	CAL COAST FINANCIAL CORP
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Oct 1, 2055

April 2022: Transfer on Death Deed, Transfer

Document Type	Transfer on Death Deed
Jurisdiction	ALAMEDA CA
Recording Date	Apr 19, 2022
Property Address	4210 COMET CIR, UNION CITY, CA 94587-4026
Document Number	0000077751
Map Reference	MB 74 PG 5
Instrument Date	Apr 12, 2022
Instrument	2022077751
Transaction Type	Transfer
Record Updated	May 12, 2022

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	29298 STATES ST, HAYWARD, CA 94544-6520

April 2022: Transfer on Death Deed, Transfer

Document Type	Transfer on Death Deed
Jurisdiction	ALAMEDA CA
Recording Date	Apr 19, 2022
Property Address	4210 COMET CIR, UNION CITY, CA 94587-4026
Document Number	0000077750
Map Reference	MB 74 PG 5
Instrument Date	Apr 12, 2022
Instrument	2022077750
Transaction Type	Transfer
Record Updated	May 12, 2022

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	29298 STATES ST, HAYWARD, CA 94544-6520

Tax Assessment & Valuation

The 2025 property tax bill for 4210 Comet Cir was $5,306.

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		$765,000 (+111.81%) Land $229,500 Building $535,500
2025	$5,306.00 Homeowner's exemption	$361,168 Land $108,350 Building $252,818
2023	$5,421.00 Homeowner's exemption	$347,146 Land $104,144 Building $243,002	$682,020

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 4210 Comet Cir 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
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

Wildfire risk around 4210 Comet Cir is low, with less than 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 94% of the US · lower than 96% 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	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 976 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 2,000
RobinsonHSS Fixed Wireless	1,000 / 1,000
Tekify Fiber & Wireless Fixed Wireless	580 / 125
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20
AT&T DSL	100 / 20

May also be available: Sail Internet, Verizon.

Nearby Properties on Comet Cir

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

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