20636 E Alda Ct, Diamond Bar (Walnut), CA 91789 Property Records

Los Angeles County property record for 20636 E Alda Ct, Diamond Bar, CA 91789

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,690 sqft · built 1981
Lot Size	0.443 acres (19,278 sqft)
Owner	Individual Name on File
Last Sale	$1,115,000 (Jun 2018)
Tax Bill	$15,930 (2025)
Deeds & Mortgages	Jun 2018 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8763-017-040`

Property Details

APN / Parcel Number

Primary APN	`8763-017-040`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	13 Rooms
Stories	2 Stories
Building Area	2,690 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1981
Effective Year Built	Effective 1981
Architectural Style	Contemporary
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Wood Shingle
Lot Area	19,278 sqft (0.443 acres)
Lot Dimensions	250 ft deep x 77 ft wide

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Water Source	Commercial

Location & Zoning

Street Address	20636 E ALDA CT
City	WALNUT
State	CA
Zip	91789-3840
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR110000*
Legal Description	*TR=33645 LOT 34
Legal Subdivision	33645
Legal Tract	33645
Legal Block	3
Legal Lot Number	34
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	3
Census Block	3006
Census Tract	408707

Owner

Source: Los Angeles County records · APN 8763-017-040

Assessment roll updated May 21, 2026 · Last verified June 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 File
Mailing Address	20636 E ALDA CT, WALNUT, CA 91789-3840
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Sole Owner

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Jun 05, 2018 · Amount on Record
Deed Sale	Jun 05, 2018 · Amount on Record
Prior Sale	Sep 18, 2003 · Amount on Record
Deed Document Number	2018556912
Record Updated	Sep 20, 2026

June 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jun 05, 2018
Property Address	20636 E ALDA CT, DIAMOND BAR, CA 91789-3840
Document Number	0000556912
Map Reference	MB 917 PG 44-50
Instrument Date	Apr 09, 2018
Instrument	18-0556912
Transaction Type	Transfer
Record Updated	Sep 22, 2021
Title Company	WFG NATIONAL TITLE COMPANY

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	20636 E ALDA CT, DIAMOND BAR, CA 91789-3840
Investor	Possibly a Property Investor

Mortgage

Document Number	0000556913
Date	Jun 05, 2018
Instrument	18-0556913

Lender

Name	EAST WEST BANK
Type	Bank

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Jul 01, 2048

Interest

Rate Type	Adjustable Rate
Rate	4.62%
Type Change Date	Jul 01, 2023
Change Frequency	Annually
Min Rate At Change	3.25%
Max Rate At Change	6.62%
Index	1-Year CMT
Max Rate	10.6%

Tax Assessment & Valuation

Source: Los Angeles County records · Assessment roll updated May 21, 2026 · Last verified June 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 is set for property tax purposes and is not a market price estimate.

Year	Tax Bill	Assessed Value
2025	$15,930.00 (+7.36%)	$1,268,675 (+4.04%) Land $699,762 Building $568,913
2023	$14,838.00 (+2.09%)	$1,219,413 Land $672,591 Building $546,822
2022	$14,534.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Los Angeles County (06037C), as of September 30, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

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

Wildfire

Wildfire Risk	Not rated no burnable land within 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)
Frontier Fiber	7,000 / 7,000
Spectrum Cable	1,000 / 1,000
T-Mobile USA Fixed Wireless	100 / 20

May also be available: California Internet, Verizon.

Based on FCC filings for 496 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system CA1910234, 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.