18907 Heidi St, Castro Valley, CA 94546 Property Records

Alameda County property record for 18907 Heidi St, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,416 sqft · built 1967
Lot Size	0.142 acres (6,174 sqft)
Owner	2 Individual Names on File
Last Sale	$1,200,000 (Sep 2022)
Tax Bill	$14,769 (2025)
Deeds & Mortgages	Sep 2022 Sale & Mortgage Nov 2021 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`84B-501-30`

Property Details

APN / Parcel Number

Primary APN	`84B-501-30`
Alternative APN	`084B-0501-030-00`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,416 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1967
Effective Year Built	Effective 1969
Architectural Style	L-Shape
Exterior Material	Stucco
Construction Type	Wood
Roof Material	Wood Shingle
Lot Area	6,174 sqft (0.142 acres)
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

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

Location & Zoning

Street Address	18907 HEIDI ST
City	CASTRO VALLEY
State	CA
Zip	94546-2917
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00027 BLK: TR: 2751
Legal Subdivision	TRACT 2751
Legal Tract	2751
Legal Lot Number	27
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1003
Census Tract	430600

Owner

18907 Heidi St is owned and occupied by two individuals who bought it in September 2022.

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

Owner of Record	2 Individual Names on File
Mailing Address	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917
Occupancy	Owner Occupied
Owner Type	Individual

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
Sep 8, 2022	Grant Deed, Transfer · Conventional Mortgage US BANK NA
Nov 22, 2021	Intrafamily Transfer, Transfer AMROCK INC
Nov 22, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage QUICKEN LOANS LLC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 8, 2022 · Amount on File
Deed Sale	Sep 8, 2022 · Amount on File
Deed Document Number	2022154913
Prior Transfer Date	Jan 30, 2021
Prior Transfer Doc	0000377545
Record Updated	Sep 20, 2026

September 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Sep 8, 2022
Property Address	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917
Document Number	0000154913
Map Reference	MB 52 PG 100
Instrument Date	Aug 26, 2022
Instrument	2022154913
Transaction Type	Transfer
Record Updated	Oct 4, 2022
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,320.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917

Mortgage

Document Number	0000154914
Date	Sep 8, 2022
Instrument	2022154914

Lender

Name	US BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2052

November 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Nov 22, 2021
Property Address	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917
Document Number	0000377547
Map Reference	MB 52 PG 100
Instrument Date	Jan 30, 2021
Instrument	2021377547
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	AMROCK INC

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	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917

November 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Nov 22, 2021
Property Address	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917
Document Number	0000377545
Map Reference	MB 52 PG 100
Instrument Date	Jan 30, 2021
Instrument	2021377545
Transaction Type	Transfer
Record Updated	Dec 22, 2021
Title Company	AMROCK INC

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	Joint Tenants
Address	18907 HEIDI ST, CASTRO VALLEY, CA 94546-2917

Mortgage

Document Number	0000377546
Date	Nov 22, 2021
Instrument	2021377546

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	351 Months
Due	Feb 1, 2051

Tax Assessment & Valuation

The 2025 property tax bill for 18907 Heidi St was $14,769 with a homeowner's exemption.

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		$1,266,440 (+6.87%) Land $382,032 Building $891,408
2025	$14,769.00 Homeowner's exemption	$1,185,000 Land $355,500 Building $829,500
2023	$13,834.00	$1,104,000 Land $331,200 Building $772,800	$1,060,740

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

Flood

FEMA maps place 18907 Heidi St 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 18907 Heidi St 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 67% of the US · lower than 81% 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 769 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
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks, Unwired, Verizon.

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