21239 Stonybrook Dr, Walnut, CA 91789 Property Records

Los Angeles County property record for 21239 Stonybrook Dr, Walnut, CA 91789

Property Summary

Property Type	Single Family Home
Details	4 bd · 4 ba · 2,630 sqft · built 1988
Lot Size	1.07 acres (46,874 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,030,500 (May 2016)
Tax Bill	$16,303 (2025)
Deeds & Mortgages	Feb 2020 Line of Credit Aug 2017 Mortgage
Flood Zone	Zone D (undetermined)
APN	`8709-061-040`

Property Details

APN / Parcel Number

Primary APN	`8709-061-040`

Interior

Bedrooms	4 Beds
Full Baths	4 Baths
Building Area	2,630 sqft Living Area

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1990
Construction Type	Wood
Lot Area	46,874 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	21239 STONYBROOK DR
City	WALNUT
State	CA
Zip	91789-5010
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	WARPD28500
Legal Description	TR=40716 LOT 40
Legal Subdivision	40716
Legal Tract	40716
Legal Block	3
Legal Lot Number	40
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 records, as of August 25, 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	21239 STONYBROOK DR, WALNUT, CA 91789-5010
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Date	Document
Feb 18, 2020	Deed of Trust, Mortgage · Line of Credit CITIBANK NA
Aug 16, 2017	Deed of Trust, Mortgage · Conventional Mortgage MK LNDG

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 5, 2016 · Amount on Record
Deed Sale	May 5, 2016 · Amount on Record
Prior Sale	Mar 28, 2006 · Amount on Record
Deed Document Number	2016516056
Record Updated	Oct 29, 2026

February 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21239 STONYBROOK DR, WALNUT, CA 91789-5010
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000189217
Date	Feb 18, 2020
Instrument	20-0189217

Lender

Name	CITIBANK NA
Type	Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

August 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21239 STONYBROOK DR, WALNUT, CA 91789-5010
Document Number	0000949096
Instrument Date	Aug 16, 2017
Transaction Type	Mortgage
Record Updated	Aug 25, 2017
Title Company	PACIFIC COAST TITLE COMPANY, PACIFIC COAST TITLE CO.

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	21239 STONYBROOK DR WALNUT CA 917895010, WALNUT, CA 91789-5010

Mortgage

Document Number	0000949096
Date	Aug 22, 2017
Instrument	949096

Lender

Name	MK LNDG
Address	NORTH HOLLYWOOD, CA 91601

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Aug 21, 2047

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of August 25, 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
2026		$1,303,115 (+2%) Land $995,194 Building $307,921
2025	$16,303.00 (+7.24%)	$1,277,568 (+4.04%) Land $975,681 Building $301,887
2023	$15,203.00 (+2.04%)	$1,227,960 Land $937,795 Building $290,165
2022	$14,899.00

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 64% of the US · lower than 78% of California
Wildfire Likelihood	0.06% 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	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 3 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable	1,000 / 35
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks.

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