20831 E Crest Ln, Diamond Bar (Walnut), CA 91789 Property Records

Los Angeles County property record for 20831 E Crest Ln, Diamond Bar, CA 91789

Property Summary

Property Type	Single Family Home
Details	3 bd · 3 ba · 1,755 sqft · built 1987
Lot Size	0.135 acres (5,898 sqft)
Owner	2 Individual Names on Record
Last Sale	$817,500 (Jan 2021)
Tax Bill	$11,870 (2025)
Deeds & Mortgages	Jan 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8765-018-037`

Property Details

APN / Parcel Number

Primary APN	`8765-018-037`

Interior

Bedrooms	3 Beds
Full Baths	3 Baths
Building Area	1,755 sqft Living Area

Exterior

Year Built	Built 1987
Effective Year Built	Effective 1987
Construction Type	Wood
Lot Area	5,898 sqft (0.135 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	20831 E CREST LN
City	WALNUT
State	CA
Zip	91789-4064
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCRPD10000
Legal Description	TR=43760 LOT 37
Legal Subdivision	43760
Legal Tract	43760
Legal Block	1
Legal Lot Number	37
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1001
Census Tract	403305

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	20831 E CREST LN, WALNUT, CA 91789-4064
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jan 20, 2021 · Amount on Record
Deed Sale	Jan 20, 2021 · Amount on Record
Prior Sale	Mar 27, 2008 · Amount on Record
Deed Document Number	2021101124
Record Updated	Oct 29, 2026

January 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jan 20, 2021
Property Address	20831 E CREST LN, DIAMOND BAR, CA 91789-4064
Document Number	0000101124
Map Reference	MB 1067 PG 17-27
Instrument Date	Jan 11, 2021
Instrument	21-0101124
Transaction Type	Transfer
Record Updated	Jul 20, 2022
Title Company	FIDELITY NATL TTL ORANGE CNT

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	20831 E CREST LN, DIAMOND BAR, CA 91789-4064

Mortgage

Document Number	0000101125
Date	Jan 20, 2021
Instrument	21-0101125

Lender

Name	SUMMIT MORTGAGE BANKERS INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Feb 1, 2051

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		$902,360 (+2%) Land $621,374 Building $280,986
2025	$11,870.00 (+8.08%)	$884,668 (+4.04%) Land $609,191 Building $275,477
2023	$10,983.00 (+2.64%)	$850,318 Land $585,537 Building $264,781
2022	$10,700.00

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	Low lower than 67% of the US · lower than 81% of California
Wildfire Likelihood	0.02% annual chance
Exposure	None beyond 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 327 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable	1,000 / 1,000

May also be available: Frontier, GeoLinks, T-Mobile, Verizon.

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