21055 Stonybrook Dr, Walnut, CA 91789 Property Records

Los Angeles County property record for 21055 Stonybrook Dr, Walnut, CA 91789

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 3,216 sqft · built 1988
Lot Size	1.06 acres (46,501 sqft)
Owner	Individual Name on File
Last Sale	$1,568,000 (Oct 2014)
Tax Bill	$23,459 (2025)
Flood Zone	Zone D (undetermined)
APN	`8709-061-032`

Property Details

APN / Parcel Number

Primary APN	`8709-061-032`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	3,216 sqft Living Area

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Construction Type	Wood
Lot Area	46,501 sqft
Lot Dimensions	240 ft deep x 205 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21055 STONYBROOK DR
City	WALNUT
State	CA
Zip	91789-5013
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	WARPD28500
Legal Description	TR=40716 LOT 32
Legal Subdivision	40716
Legal Tract	40716
Legal Block	3
Legal Lot Number	32
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	3
Census Block	3001
Census Tract	403403

Owner

Source: Los Angeles County assessment roll, as of May 21, 2026

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

Owner of Record	Individual Name on File
Mailing Address	21055 STONYBROOK DR, WALNUT, CA 91789-5013
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Single Person

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Oct 7, 2014 · Amount on Record
Deed Sale	Oct 7, 2014 · Amount on Record
Deed Document Number	20141060222
Prior Transfer Date	Sep 30, 2014
Prior Transfer Doc	0001060221
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of May 21, 2026

Property Jurisdictions

Type	Name
State	California
County	Los Angeles County
Municipality	Walnut City
Unified School District	Walnut Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2025	$23,459.00 (+7.17%)	$1,884,492 (+4.04%) Land $1,081,661 Building $802,831
2023	$21,890.00 (+2.06%)	$1,811,316 Land $1,039,659 Building $771,657
2022	$21,448.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective September 30, 2026

FEMA Flood Zone	Zone D undetermined · not studied
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	Low lower than 62% of the US · lower than 77% of California
Wildfire Likelihood	0.06% annual chance
Exposure	Direct burnable vegetation at the parcel

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	WALNUT VALLEY WATER DISTRICT serves 100,941 people · EPA ID CA1910234
Water Source	Purchased surface water from several systems
Last State Inspection	Jun 2023
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 260 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Frontier, T-Mobile USA.

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