4243 Heyer Ave, Castro Valley, CA 94546 Property Records

Alameda County property record for 4243 Heyer Ave, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	2 bd · 2 ba · 952 sqft · built 1987
Lot Size	0.155 acres (6,759 sqft)
Owner	2 Individual Names on File
Last Sale	$792,000 (Aug 2021)
Tax Bill	$10,787 (2025)
Deeds & Mortgages	Apr 2022 Transfer Aug 2021 Sale & Mortgage + 4 more
Flood Zone	Zone X (minimal risk)
APN	`84C-750-31`

Property Details

APN / Parcel Number

Primary APN	`84C-750-31`
Alternative APN	`084C-0750-031-00`

Interior

Bedrooms	2 Beds
Full Baths	2 Baths
Total Rooms	4 Rooms
Building Area	952 sqft Living Area

Exterior

Year Built	Built 1987
Effective Year Built	Effective 1987
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	6,759 sqft (0.155 acres)

Location & Zoning

Street Address	4243 HEYER AVE
City	CASTRO VALLEY
State	CA
Zip	94546-3507
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 0000C BLK: PM: 0159 PAGE: 0098
Legal Subdivision	PARCEL MAP 4607
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1001
Census Tract	430800

Owner

4243 Heyer Ave is owned and occupied by two individuals who bought it in August 2021.

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

Owner of Record	2 Individual Names on File
Mailing Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

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
Apr 7, 2022	Intrafamily Transfer, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO
Aug 6, 2021	Grant Deed, Transfer · Conventional Mortgage ROCKET MORTGAGE LLC
May 16, 2019	Deed of Trust, Mortgage · Conventional Mortgage BANK OF THE WEST
Jan 2, 2019	Quit Claim Deed, Transfer OTHER
Jan 2, 2019	Quit Claim Deed, Transfer OTHER
Jan 9, 2018	Deed of Trust, Mortgage · Line of Credit BANK OF THE WEST

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 6, 2021 · Amount on File
Deed Sale	Aug 6, 2021 · Amount on File
Prior Sale	Oct 26, 2012 · Amount on File
Deed Document Number	2021269635
Transfer Doc	0000377824
Record Updated	Oct 29, 2026

April 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Apr 7, 2022
Property Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Document Number	0000070497
Map Reference	MB 159 PG 98&99
Instrument Date	Apr 5, 2022
Instrument	2022070497
Transaction Type	Transfer
Record Updated	May 3, 2022
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

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
Relationship	Community Property with Right of Survivorship
Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507

August 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Aug 6, 2021
Property Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Document Number	0000269635
Map Reference	MB 159 PG 98&99
Instrument Date	Jul 27, 2021
Instrument	2021269635
Transaction Type	Transfer
Record Updated	Aug 31, 2021
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$871.20
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	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507

Mortgage

Document Number	0000269636
Date	Aug 6, 2021
Instrument	2021269636

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company

Agreement

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

May 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Document Number	0000106308
Instrument Date	May 16, 2019
Transaction Type	Mortgage
Record Updated	Jun 21, 2019
Title Company	NOT AVAILABLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	4243 HEYER AVE CASTRO VALLEY CA 945463507, CASTRO VALLEY, CA 94546-3507

Mortgage

Document Number	0000106308
Date	Jun 6, 2019
Instrument	106308

Lender

Name	BANK OF THE WEST
Type	Bank
Address	OMAHA, NE 68154

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jun 5, 2049

January 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Jan 2, 2019
Property Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Document Number	0000000390
Instrument Date	Nov 18, 2018
Instrument	390
Transaction Type	Transfer
Record Updated	Jan 25, 2019
Title Company	OTHER

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	4243 HEYER AVE CASTRO VALLEY CA 945463507, CASTRO VALLEY, CA 94546-3507

January 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Jan 2, 2019
Property Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Document Number	0000000391
Instrument Date	Nov 18, 2018
Instrument	391
Transaction Type	Transfer
Record Updated	Jan 25, 2019
Title Company	OTHER

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	4243 HEYER AVE CASTRO VALLEY CA 945463507, CASTRO VALLEY, CA 94546-3507

January 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4243 HEYER AVE, CASTRO VALLEY, CA 94546-3507
Document Number	0000014841
Instrument Date	Jan 9, 2018
Transaction Type	Mortgage
Record Updated	Feb 6, 2018
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	4243 HEYER AVE CASTRO VALLEY CA 945463507, CASTRO VALLEY, CA 94546-3507

Mortgage

Document Number	0000014841
Date	Jan 25, 2018
Instrument	14841

Lender

Name	BANK OF THE WEST
Type	Bank
Address	CASTRO VALLEY, CA 94546

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Jan 24, 2048

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 4243 Heyer Ave was $10,787.

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

Property Jurisdictions

Type	Name
State	California
County	Alameda County
Unified School District	Castro Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$857,275 (+2%) Land $257,182 Building $600,093
2025	$10,787.00	$840,470 Land $252,141 Building $588,329
2023	$10,385.00	$807,840 Land $242,352 Building $565,488	$810,720

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

Flood

FEMA maps place 4243 Heyer Ave in Zone X, an area of minimal flood risk.

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

Wildfire risk around 4243 Heyer 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	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	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 704 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 · DSL · Fixed Wireless in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
Starlink Satellite	280 / 30
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks.

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