17823 Madison Ave, Castro Valley, CA 94546 Property Records

Alameda County property record for 17823 Madison Ave, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,798 sqft · built 1953
Lot Size	0.965 acres (42,048 sqft)
Owner	Individual Name on File
Last Sale	$1,060,000 (May 2019)
Tax Bill	$15,205 (2025)
Deeds & Mortgages	Sep 2020 Mortgage May 2019 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`84C-955-9-7`

Property Details

APN / Parcel Number

Primary APN	`84C-955-9-7`
Alternative APN	`084C-0955-009-07`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,798 sqft Living Area

Exterior

Year Built	Built 1953
Effective Year Built	Effective 1980
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	42,048 sqft (0.965 acres)

Location & Zoning

Street Address	17823 MADISON AVE
City	CASTRO VALLEY
State	CA
Zip	94546-1625
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00007 BLK: 0009 AR: 084C PAGE: 0955
Legal Subdivision	VAN HOOSEAR
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	5
Census Block	5000
Census Tract	430200

Owner

17823 Madison Ave is owned and occupied by an individual who bought it in May 2019.

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

Owner of Record	Individual Name on File
Mailing Address	17823 MADISON AVE, CASTRO VALLEY, CA 94546-1625
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 10, 2020	Deed of Trust, Mortgage · Conventional Mortgage AMERICAN PACIFIC MORTGAGE CORP
May 24, 2019	Quit Claim Deed, Transfer OLD REPUBLIC TITLE
May 24, 2019	Grant Deed, Transfer OLD REPUBLIC TITLE COMPANY

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 24, 2019 · Amount on File
Deed Sale	May 24, 2019 · Amount on File
Deed Document Number	201998113
Prior Transfer Date	May 23, 2019
Prior Transfer Doc	0000098114
Record Updated	Oct 29, 2026

September 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	17823 MADISON AVE, CASTRO VALLEY, CA 94546-1625
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	17823 MADISON AVE, CASTRO VALLEY, CA 94546-1625

Mortgage

Document Number	0000227603
Date	Sep 10, 2020
Instrument	2020227603

Lender

Name	AMERICAN PACIFIC MORTGAGE CORP
Type	Mortgage Company
Address	ROSEVILLE, CA 95661

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2050

May 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	May 24, 2019
Property Address	17823 MADISON AVE, CASTRO VALLEY, CA 94546-1625
Document Number	0000098114
Instrument Date	May 23, 2019
Instrument	98114
Transaction Type	Transfer
Record Updated	Jun 17, 2019
Title Company	OLD REPUBLIC TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	17740 APRIL CT CASTRO VALLEY CA 945461117, CASTRO VALLEY, CA 94546-1117

May 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	May 24, 2019
Property Address	17823 MADISON AVE, CASTRO VALLEY, CA 94546-1625
Document Number	0000098113
Instrument Date	May 21, 2019
Instrument	2019098113
Transaction Type	Transfer
Record Updated	Aug 19, 2021
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount 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
Address	17740 APRIL CT, CASTRO VALLEY, CA 94546-1117

Tax Assessment & Valuation

The 2025 property tax bill for 17823 Madison Ave was $15,205.

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		$1,239,141 (+2%) Land $395,142 Building $843,999
2025	$15,205.00	$1,214,844 Land $387,394 Building $827,450
2023	$14,287.00	$1,136,520 Land $340,956 Building $795,564	$1,158,480

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

Flood

FEMA maps place 17823 Madison Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2022.

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
Community Rating System	Class 7 (15% premium discount)
Nearby Flood Policies	1 in force
Nearby Flood Claims	1 (2022)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides

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 17823 Madison Ave is moderate, ranking above 45% 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 45% of the US · lower than 73% of California
Wildfire Likelihood	0.1% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 402 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Etheric Networks, Sonic Telecom, T-Mobile, Unwired.

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