21055 Glenbrook Dr, Diamond Bar (Walnut), CA 91789 Property Records

Los Angeles County property record for 21055 Glenbrook Dr, Diamond Bar, CA 91789

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 2,000 sqft · built 1979
Lot Size	0.152 acres (6,636 sqft)
Owner	2 Company Names on Record
Last Sale	$723,000 (Apr 2019)
Tax Bill	$10,310 (2025)
Deeds & Mortgages	Mar 2021 Line of Credit Oct 2020 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`8763-009-011`

Property Details

APN / Parcel Number

Primary APN	`8763-009-011`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,000 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1979
Effective Year Built	Effective 1979
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Material	Wood Shingle
Lot Area	6,636 sqft (0.152 acres)
Garage Type	Attached

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	21055 GLENBROOK DR
City	WALNUT
State	CA
Zip	91789-3812
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCC2*
Legal Description	*TR=33257 LOT 107
Legal Subdivision	33257
Legal Tract	33257
Legal Block	3
Legal Lot Number	107
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	3
Census Block	3002
Census Tract	408707

Owner

Source: Los Angeles County records, as of August 25, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	2 Company Names on Record
Mailing Address	21055 GLENBROOK DR, WALNUT, CA 91789-3812
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Revocable Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 30, 2021	Deed of Trust, Mortgage · Line of Credit NORTHROP GRUMMAN FCU
Oct 22, 2020	Deed of Trust, Mortgage · Conventional Mortgage J & P R/E SVCS INC
Feb 12, 2020	Deed of Trust, Mortgage · Conventional Mortgage J & P R/E SVCS INC
Apr 23, 2019	Grant Deed, Transfer · Conventional Mortgage J & P REAL ESTATE SERVICES INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 23, 2019 · Amount on Record
Deed Sale	Apr 23, 2019 · Amount on Record
Prior Sale	Jan 24, 2013 · Amount on Record
Deed Document Number	2019359819
Prior Transfer Date	May 9, 1994
Prior Transfer Doc	0000951957
Record Updated	Oct 29, 2026

March 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21055 GLENBROOK DR, DIAMOND BAR, CA 91789-3812
Transaction Type	Mortgage
Record Updated	Apr 7, 2021
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21055 GLENBROOK DR, WALNUT, CA 91789-3812

Mortgage

Document Number	0000491559
Date	Mar 30, 2021
Instrument	21-0491559

Lender

Name	NORTHROP GRUMMAN FCU
Type	Credit Union
Address	GARDENA, CA 90248

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	180 Months
Due	Mar 29, 2036

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

October 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21055 GLENBROOK DR, DIAMOND BAR, CA 91789-3812
Document Number	0000005248
Instrument Date	Oct 22, 2020
Transaction Type	Mortgage
Record Updated	Jan 8, 2021
Title Company	NOT AVAILABLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	21055 GLENBROOK DR WALNUT CA 917893812, WALNUT, CA 91789-3812

Mortgage

Document Number	0000005248
Date	Jan 4, 2021
Instrument	5248

Lender

Name	J & P R/E SVCS INC
Address	SAN GABRIEL, CA 91776

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Jan 3, 2051

February 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	21055 GLENBROOK DR, DIAMOND BAR, CA 91789-3812
Document Number	0000343267
Instrument Date	Feb 12, 2020
Transaction Type	Mortgage
Record Updated	Apr 7, 2020
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	21055 GLENBROOK DR WALNUT CA 917893812, WALNUT, CA 91789-3812

Mortgage

Document Number	0000343267
Date	Mar 24, 2020
Instrument	343267

Lender

Name	J & P R/E SVCS INC
Address	SAN GABRIEL, CA 91776

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Mar 23, 2050

April 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Apr 23, 2019
Property Address	21055 GLENBROOK DR, DIAMOND BAR, CA 91789-3812
Document Number	0000359819
Instrument Date	Mar 19, 2019
Instrument	359819
Transaction Type	Transfer
Record Updated	May 6, 2019
Title Company	TICOR TITLE COMPANY/CA, TICOR TITLE CO/CA

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$795.30
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	21055 GLENBROOK DR WALNUT CA 917893812, WALNUT, CA 91789-3812

Mortgage

Document Number	359820
Date	Apr 23, 2019
Instrument	359820

Lender

Name	J & P REAL ESTATE SERVICES INC
Address	923 E VALLEY BLVD # 109, SAN GABRIEL, CA 91776-3684

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Apr 22, 2049

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	Diamond Bar City
Unified School District	Walnut Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$822,645 (+2%) Land $565,955 Building $256,690
2025	$10,310.00 (+7.51%)	$806,515 (+4.04%) Land $554,858 Building $251,657
2023	$9,590.00 (-1.69%)	$775,199 Land $533,313 Building $241,886
2022	$9,755.00

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 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	Not rated no burnable land within 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	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 286 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Frontier Fiber	7,000 / 7,000
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Starlink Satellite	280 / 30
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks, Verizon.

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