20834 E Boulder Ln, Diamond Bar (Walnut), CA 91789 Property Records

Los Angeles County property record for 20834 E Boulder Ln, Diamond Bar, CA 91789

Property Summary

Property Type	Single Family Home
Details	3 bd · 3 ba · 1,755 sqft · built 1987
Lot Size	0.185 acres (8,049 sqft)
Owner	2 Individual Names on File
Last Sale	$1,308,000 (Nov 2025)
Tax Bill	$7,301 (2025)
Deeds & Mortgages	Nov 2025 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8765-019-050`

Property Details

APN / Parcel Number

Primary APN	`8765-019-050`

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	8,049 sqft (0.185 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	20834 E BOULDER LN
City	WALNUT
State	CA
Zip	91789-4056
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCRPD10000
Legal Description	TR=43760 LOT 88
Legal Subdivision	43760
Legal Tract	43760
Legal Block	1
Legal Lot Number	88
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 · APN 8765-019-050

Assessment roll updated May 21, 2026 · Last verified July 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 File
Mailing Address	20834 E BOULDER LN, WALNUT, CA 91789-4056
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Nov 25, 2025 · Amount on Record
Deed Sale	Nov 25, 2025 · Amount on Record
Prior Sale	Jul 09, 2025 · Amount on Record
Deed Document Number	2025846044
Prior Transfer Date	Jul 02, 2025
Prior Transfer Doc	0000458650
Record Updated	Sep 20, 2026

November 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Nov 25, 2025
Property Address	20834 E BOULDER LN, DIAMOND BAR, CA 91789-4056
Document Number	0000846044
Map Reference	MB 1067 PG 17-27
Instrument Date	Nov 12, 2025
Instrument	25-0846044
Transaction Type	Transfer
Record Updated	Dec 08, 2025
Title Company	PROVIDENT TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
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	Community Property with Right of Survivorship
Address	20834 E BOULDER LN, DIAMOND BAR, CA 91789-4056
Investor	Possibly a Property Investor

Mortgage

Document Number	0000846045
Date	Nov 25, 2025
Instrument	25-0846045

Lender

Name	AITON CAPITAL INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Dec 01, 2055

Tax Assessment & Valuation

Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified July 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

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Year	Tax Bill	Assessed Value
2025	$7,301.00 (+7.73%) Homeowner's exemption	$512,790 (+4.04%) Land $260,637 Building $252,153
2023	$6,777.00 (+2.23%) Homeowner's exemption	$492,879 Land $250,517 Building $242,362
2022	$6,629.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

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 are read at the parcel center point; lenders make the official flood determination.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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

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

Based on FCC filings for 327 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	WALNUT VALLEY WATER DISTRICT serves 100,941 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.