16823 Columbia Dr, Castro Valley, CA 94552 Property Records

Alameda County property record for 16823 Columbia Dr, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,830 sqft · built 1988
Lot Size	0.248 acres (10,800 sqft)
Owner	2 Individual Names on Record
Last Sale	$387,000 (Mar 1998)
Tax Bill	$8,078 (2025)
Flood Zone	Zone X (minimal risk)
APN	`85-6315-68`

Property Details

APN / Parcel Number

Primary APN	`85-6315-68`
Alternative APN	`085-6315-068-00`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	2,830 sqft Living Area

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	10,800 sqft (0.248 acres)
Parking Spaces	3 Parking Spaces

Location & Zoning

Street Address	16823 COLUMBIA DR
City	CASTRO VALLEY
State	CA
Zip	94552-1615
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00073 BLK: TR: 5204
Legal Tract	5204
Legal Lot Number	73
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1001
Census Tract	430200

Owner

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

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on Record
Mailing Address	16823 COLUMBIA DR, CASTRO VALLEY, CA 94552-1615
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Mar 12, 1998 · Amount on Record
Deed Sale	Mar 12, 1998 · Amount on Record
Prior Sale	Oct 1, 1993 · Amount on Record
Deed Document Number	199886492
Record Updated	Oct 29, 2026

Tax Assessment & Valuation

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		$623,267 (+0.87%) Land $189,080 Building $441,187
2025	$8,078.00 (+4.07%) Homeowner's exemption	$617,910 (+4.04%) Land $185,373 Building $432,537
2023	$7,762.00 Homeowner's exemption	$593,920 Land $178,176 Building $415,744	$1,620,540

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

Flood

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

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

Wildfire Risk	High above 73% of the US · above 48% of California
Wildfire Likelihood	0.4% annual chance
Exposure	Direct burnable vegetation

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

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Starlink Satellite	280 / 30
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20
AT&T DSL	100 / 20