624 Mount St, Diamond Bar, CA 91765 Property Records

Los Angeles County property record for 624 Mount St, Diamond Bar, CA 91765

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 1,708 sqft · built 1972
Lot Size	0.179 acres (7,789 sqft)
Owner	2 Individual Names on Record
Last Sale	$450,000 (Aug 2013)
Tax Bill	$7,736 (2025)
Deeds & Mortgages	Oct 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`8717-021-023`

Property Details

APN / Parcel Number

Primary APN	`8717-021-023`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	11 Rooms
Stories	1 Story
Building Area	1,708 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1972
Effective Year Built	Effective 1972
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Wood Shingle
Lot Area	7,789 sqft (0.179 acres)
Lot Dimensions	132 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	624 MOUNT ST
City	DIAMOND BAR
State	CA
Zip	91765-1938
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCR18000*
Legal Description	TRACT NO 31139 LOT 23
Legal Subdivision	31139
Legal Tract	31139
Legal Block	2
Legal Lot Number	23
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2001
Census Tract	403319

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	2 Individual Names on Record
Mailing Address	624 MOUNT ST, DIAMOND BAR, CA 91765-1938
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 1, 2013 · Amount on Record
Deed Sale	Aug 1, 2013 · Amount on Record
Prior Sale	Apr 22, 2005 · Amount on Record
Deed Document Number	20131130873
Prior Transfer Date	Feb 3, 1997
Prior Transfer Doc	0000190501
Record Updated	Oct 29, 2026

October 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	624 MOUNT ST, DIAMOND BAR, CA 91765-1938
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	CHICAGO TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	624 MOUNT ST, DIAMOND BAR, CA 91765-1938

Mortgage

Document Number	0001367768
Date	Oct 30, 2020
Instrument	20-1367768

Lender

Name	ONE AMERICAN BANK
Type	Bank
Address	SAN FRANCISCO, CA 94108

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	181 Months
Due	Nov 1, 2035

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		$562,660 (+2%) Land $450,131 Building $112,529
2025	$7,736.00 (+11.45%)	$551,628 (+4.04%) Land $441,305 Building $110,323
2023	$6,941.00 (+0.83%)	$530,209 Land $424,169 Building $106,040
2022	$6,884.00

Assessed value is set for property tax purposes and is not a market price estimate.

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	Not rated no burnable land within ember reach

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 215 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable	1,000 / 1,000
AT&T Fixed Wireless	100 / 20

May also be available: GeoLinks, T-Mobile, Verizon.

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