524 Topside Pl, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 524 Topside Pl, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 1,791 sqft · built 1988
Lot Size	0.496 acres (21,612 sqft)
Owner	Individual Name on Record
Last Sale	$1,090,000 (Sep 2025)
Tax Bill	$5,794 (2025)
Deeds & Mortgages	May 2023 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8281-047-024`

Property Details

APN / Parcel Number

Primary APN	`8281-047-024`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Building Area	1,791 sqft Living Area

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Construction Type	Wood
Lot Area	21,612 sqft (0.496 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	524 TOPSIDE PL
City	DIAMOND BAR
State	CA
Zip	91765-1878
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR115000-
Legal Description	TR=36813 LOT 74
Legal Subdivision	36813
Legal Tract	36813
Legal Block	1
Legal Lot Number	74
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1000
Census Tract	403321

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	524 TOPSIDE PL, DIAMOND BAR, CA 91765-1878
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Single Woman

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 3, 2025 · Amount on Record
Deed Sale	Sep 3, 2025 · Amount on Record
Prior Sale	Dec 8, 2010 · Amount on Record
Deed Document Number	2025598716
Prior Transfer Date	Mar 16, 2023
Prior Transfer Doc	0000326783
Record Updated	Oct 29, 2026

May 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	May 19, 2023
Property Address	524 TOPSIDE PL, DIAMOND BAR, CA 91765-1878
Document Number	0000326783
Map Reference	MB 1033 PG 35&4
Instrument Date	Mar 16, 2023
Instrument	23-0326783
Transaction Type	Transfer
Record Updated	Jun 7, 2023

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	33775 GOLDEN LANTERN ST APT B, B, DANA POINT, CA 92629-5379

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	Pomona Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$1,090,000 (+182.83%) Land $791,900 Building $298,100
2025	$5,794.00 (+13.21%) Homeowner's exemption	$385,386 (+4.04%) Land $166,113 Building $219,273
2023	$5,118.00 (+2.61%) Homeowner's exemption	$370,422 Land $159,663 Building $210,759
2022	$4,988.00

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.

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	Moderate above 57% of the US · lower than 66% of California
Wildfire Likelihood	0.1% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 487 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
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: GeoLinks.

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