2129 Mountain Ave, Duarte, CA 91010 Property Records

Los Angeles County property record for 2129 Mountain Ave, Duarte, CA 91010

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,314 sqft · built 1919
Lot Size	0.155 acres (6,747 sqft)
Owner	2 Individual Names on Record
Last Sale	$495,000 (Sep 2017)
Tax Bill	$7,864 (2025)
Deeds & Mortgages	Oct 2021 Mortgage Sep 2017 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`8521-009-055`

Property Details

APN / Parcel Number

Primary APN	`8521-009-055`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Building Area	1,314 sqft Living Area

Exterior

Year Built	Built 1919
Effective Year Built	Effective 1925
Construction Type	Wood
Lot Area	6,747 sqft (0.155 acres)
Lot Dimensions	135 ft deep x 55 ft wide

Utilities, Heating & Cooling

Heating System	Floor/Wall Furnace

Location & Zoning

Street Address	2129 MOUNTAIN AVE
City	DUARTE
State	CA
Zip	91010-3554
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	LCA15000*
Legal Description	P 2-560-561 FOR DESC SEE ASSESSORS MAPS POR OF SEC 36 T1N R11W
Legal Range	11W
Legal Township	01N
Legal Section	36
Legal Subdivision	SECTION 36 OF THE RANCHO AZUSA DE DUARTE
Legal Block	1
Jurisdiction	LOS ANGELES CA
Township / Civil Division	UPPER SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1010
Census Tract	431200

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	2129 MOUNTAIN AVE, DUARTE, CA 91010-3554
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Oct 27, 2021	Deed of Trust, Mortgage · Conventional Mortgage ROYAL BUSINESS BANK
Sep 11, 2017	Grant Deed, Transfer · ARM ROYAL BUSINESS BANK
Sep 11, 2017	Quit Claim Deed, Transfer FIRST AMERICAN TITLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 11, 2017 · Amount on Record
Deed Sale	Sep 11, 2017 · Amount on Record
Prior Sale	Dec 17, 2004 · Amount on Record
Deed Document Number	20171024336
Prior Transfer Date	Mar 10, 1994
Prior Transfer Doc	0000523885
Record Updated	Oct 29, 2026

October 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	LOS ANGELES CA
Property Address	2129 MOUNTAIN AVE, DUARTE, CA 91010-3554
Transaction Type	Mortgage
Record Updated	Nov 3, 2021
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2129 MOUNTAIN AVE, DUARTE, CA 91010-3554

Mortgage

Document Number	0001611257
Date	Oct 27, 2021
Instrument	21-1611257

Lender

Name	ROYAL BUSINESS BANK
Type	Bank
Address	LOS ANGELES, CA 90017

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2051

September 2017: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Sep 11, 2017
Property Address	2129 MOUNTAIN AVE, DUARTE, CA 91010-3554
Document Number	0001024336
Map Reference	MR6 PG52
Instrument Date	Aug 7, 2017
Instrument	17-1024336
Transaction Type	Transfer
Record Updated	Sep 22, 2021
Title Company	FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Notice of Default Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	2129 MOUNTAIN AVE, DUARTE, CA 91010-3554

Mortgage

Document Number	0001024337
Date	Sep 11, 2017
Instrument	17-1024337

Lender

Name	ROYAL BUSINESS BANK
Type	Bank

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Oct 1, 2047

Interest

Rate Type	Adjustable Rate
Rate	4.5%
Type Change Date	Oct 1, 2024
Change Frequency	Annually
Min Rate At Change	3.5%
Max Rate At Change	5.5%
Index	1-Year LIBOR
Max Rate	9.5%

September 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Sep 11, 2017
Property Address	2129 MOUNTAIN AVE, DUARTE, CA 91010-3554
Document Number	0001024335
Instrument Date	Aug 7, 2017
Instrument	1024335
Transaction Type	Transfer
Record Updated	Sep 18, 2017
Title Company	FIRST AMERICAN TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	2801 E MIRALOMA AVE ANAHEIM CA 928061804, ANAHEIM, CA 92806-1804

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of August 25, 2026

Property Jurisdictions

Type	Name
State	California
County	Los Angeles County
Unified School District	Duarte Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$574,482 (+2%) Land $438,931 Building $135,551
2025	$7,864.00 (+6.46%)	$563,219 (+4.04%) Land $430,325 Building $132,894
2023	$7,387.00 (+2.53%)	$541,351 Land $413,616 Building $127,735
2022	$7,205.00

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	CAL-AM WATER COMPANY - DUARTE private · serves 24,767 people · EPA ID CA1910186
Water Source	Groundwater
Last State Inspection	Feb 2025
Lead	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 858 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Frontier Fiber	5,000 / 5,000
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
Starlink Satellite	280 / 30

May also be available: GeoLinks, T-Mobile.

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