1728 Roundtree Cir, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 1728 Roundtree Cir, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,550 sqft · built 1977
Lot Size	0.183 acres (7,967 sqft)
Owner	2 Company Names on File
Tax Bill	$4,491 (2025)
Deeds & Mortgages	Jul 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8292-020-052`

Property Details

APN / Parcel Number

Primary APN	`8292-020-052`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	10 Rooms
Stories	1 Story
Building Area	1,550 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1977
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Wood Shingle
Lot Area	7,967 sqft (0.183 acres)
Lot Dimensions	123 ft deep x 61 ft wide
Garage Type	Attached

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Water Source	Commercial

Location & Zoning

Street Address	1728 ROUNDTREE CIR
City	DIAMOND BAR
State	CA
Zip	91765-2751
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR1*
Legal Description	*TR=28579 LOT 103
Legal Subdivision	28579
Legal Tract	28579
Legal Block	2
Legal Lot Number	103
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2002
Census Tract	403328

Owner

Source: Los Angeles County assessment roll, APN 8292-020-052, as of 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	2 Company Names on File
Mailing Address	1728 ROUNDTREE CIR, DIAMOND BAR, CA 91765-2751
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Transfer Date	Aug 22, 2016
Transfer Doc	0001063679
Record Updated	Sep 20, 2026

July 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	1728 ROUNDTREE CIR, DIAMOND BAR, CA 91765-2751
Transaction Type	Mortgage
Record Updated	Aug 03, 2021
Title Company	TICOR TITLE ORANGE COUNTY BR, TICOR TTL ORANGE CNTY BRANCH

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1728 ROUNDTREE CIR, DIAMOND BAR, CA 91765-2751

Mortgage

Document Number	0001081079
Date	Jul 13, 2021
Instrument	21-1081079

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company
Address	PONTIAC, MI 48341

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Aug 01, 2051

Tax Assessment & Valuation

Source: Los Angeles County assessment roll as of 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	$4,491.00 (+8.87%) Homeowner's exemption	$323,444 (+4.04%) Land $128,223 Building $195,221
2023	$4,125.00 (+2.18%) Homeowner's exemption	$310,887 Land $123,245 Building $187,642
2022	$4,037.00

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, 441 locations within half a mile, as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Spectrum Cable	1,000 / 35

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

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.