585 Topside Pl, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 585 Topside Pl, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,405 sqft · built 1988
Lot Size	0.188 acres (8,208 sqft)
Owner	2 Individual Names on File
Last Sale	$650,000 (Apr 2010)
Tax Bill	$11,431 (2025)
Deeds & Mortgages	Jan 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8281-047-004`

Property Details

APN / Parcel Number

Primary APN	`8281-047-004`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Building Area	2,405 sqft Living Area

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Construction Type	Wood
Lot Area	8,208 sqft (0.188 acres)

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	585 TOPSIDE PL
City	DIAMOND BAR
State	CA
Zip	91765-1880
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR115000-
Legal Description	TR=36813 LOT 54
Legal Subdivision	36813
Legal Tract	36813
Legal Block	3
Legal Lot Number	54
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 · APN 8281-047-004

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	2 Individual Names on File
Mailing Address	585 TOPSIDE PL, DIAMOND BAR, CA 91765-1880
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Apr 29, 2010 · Amount on Record
Deed Sale	Apr 29, 2010 · Amount on Record
Deed Document Number	2010580528
Last Transfer Date	Dec 31, 2020
Transfer Doc	0000066259
Record Updated	Sep 20, 2026

January 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	Jan 13, 2021
Property Address	585 TOPSIDE PL, DIAMOND BAR, CA 91765-1880
Document Number	0000066259
Map Reference	MB 1033 PG 35-44
Instrument Date	Dec 31, 2020
Instrument	21-0066259
Transaction Type	Transfer
Record Updated	Sep 22, 2021
Title Company	FIDELITY NATL TTL ORANGE CNT

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	Joint Tenants
Address	585 TOPSIDE PL, DIAMOND BAR, CA 91765-1880

Mortgage

Document Number	0000066260
Date	Jan 13, 2021
Instrument	21-0066260

Lender

Name	JMAC LENDING INC
Type	Mortgage Company

Agreement

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

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	Pomona 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	$11,431.00 (+11.06%)	$839,021 (+4.04%) Land $432,161 Building $406,860
2023	$10,293.00 (+1.55%)	$806,443 Land $415,381 Building $391,062
2022	$10,136.00

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

May also be available: California Internet.

Based on FCC filings for 487 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.