20445 Gernside Dr, Diamond Bar (Walnut), CA 91789 Property Records

Los Angeles County property record for 20445 Gernside Dr, Diamond Bar, CA 91789

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,304 sqft · built 1975
Lot Size	0.218 acres (9,493 sqft)
Owner	Individual Name on Record
Last Sale	$968,000 (Jul 2014)
Tax Bill	$11,200 (2025)
Deeds & Mortgages	Jul 2019 Transfer Jul 2019 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8763-021-014`

Property Details

APN / Parcel Number

Primary APN	`8763-021-014`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	2,304 sqft Living Area

Exterior

Year Built	Built 1975
Effective Year Built	Effective 1975
Construction Type	Wood
Lot Area	9,493 sqft (0.218 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	20445 GERNSIDE DR
City	WALNUT
State	CA
Zip	91789-3738
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR110000*
Legal Description	*TR=32109 LOT 116
Legal Subdivision	32109
Legal Tract	32109
Legal Block	3
Legal Lot Number	116
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	3
Census Block	3009
Census Tract	408707

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	Individual Name on Record
Mailing Address	20445 GERNSIDE DR, WALNUT, CA 91789-3738
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Sole Owner

Deeds, Mortgages & Sale History

Date	Document
Jul 26, 2019	Quit Claim Deed, Transfer NOT AVAILABLE
Jul 26, 2019	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jul 25, 2014 · Amount on Record
Deed Sale	Jul 25, 2014 · Amount on Record
Prior Sale	Feb 11, 2014 · Amount on Record
Deed Document Number	2014770576
Last Transfer Date	Jul 16, 2019
Transfer Doc	0000740043
Record Updated	Oct 29, 2026

July 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jul 26, 2019
Property Address	20445 GERNSIDE DR, DIAMOND BAR, CA 91789-3738
Document Number	0000740043
Instrument Date	Jul 16, 2019
Instrument	740043
Transaction Type	Transfer
Record Updated	Aug 1, 2019
Title Company	NOT AVAILABLE

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	20445 GERNSIDE DR WALNUT CA 917893738, WALNUT, CA 91789-3738

July 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jul 26, 2019
Property Address	20445 GERNSIDE DR, DIAMOND BAR, CA 91789-3738
Document Number	0000740044
Instrument Date	Jul 16, 2019
Instrument	740044
Transaction Type	Transfer
Record Updated	Aug 1, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Amount Accuracy	Full Value
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	20445 GERNSIDE DR WALNUT CA 917893738, WALNUT, CA 91789-3738

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		$896,870 (+2%) Land $557,756 Building $339,114
2025	$11,200.00 (+7.59%)	$879,285 (+4.04%) Land $546,820 Building $332,465
2023	$10,410.00 (+2.11%)	$845,144 Land $525,588 Building $319,556
2022	$10,195.00

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

Provider	Max Down / Up (Mbps)
Frontier Fiber	7,000 / 7,000
Spectrum Cable	1,000 / 1,000
T-Mobile Fixed Wireless	100 / 20

May also be available: AT&T, GeoLinks, Verizon.

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