903 Diamond St, Monrovia, CA 91016 Property Records

Los Angeles County property record for 903 Diamond St, Monrovia, CA 91016

Property Summary

Property Type	Triplex
Details	9 bd · 6 ba · 4,552 sqft · built 1988
Lot Size	0.662 acres (28,844 sqft)
Owner	2 Company Names on Record
Last Sale	$400,000 (Jun 1999)
Tax Bill	$9,804 (2025)
Deeds & Mortgages	May 2026 Transfer May 2023 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8507-017-054`

Property Details

APN / Parcel Number

Primary APN	`8507-017-054`

Interior

Bedrooms	9 Beds
Full Baths	6 Baths
Total Rooms	6 Rooms
Units	3 Units
Stories	1 Story
Building Area	4,552 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Architectural Style	Conventional
Exterior Material	Stucco
Construction Type	Wood
Roof Type	Gable
Roof Material	Rolled Roofing
Lot Area	28,844 sqft (0.662 acres)
Lot Dimensions	414 ft deep x 67 ft wide
Total Buildings	3 Buildings

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	903 DIAMOND ST
City	MONROVIA
State	CA
Zip	91016-3829
Property Category	Residential
Property Type	Residential > Multi-Unit > Triplex
Local Zoning Code	MORPD*
Legal Description	PART OF SANTA ANITA TRACT LOT ON N LINE OF DIAMOND ST COM W 182.7 FT FROM W LINE OF ENCINO AVE TH W ON SD N LINE 67.3 FT TH N 427.55 FT TH SE PARALLEL WITH SW L INE OF A T&S F RY R/W TO A PT N 400.56 PART OF BLKS 39 AND LOT BLK 40
Legal Subdivision	SANTA ANITA TRACT
Legal Block	40
Jurisdiction	LOS ANGELES CA
Township / Civil Division	UPPER SAN GABRIEL VALLEY
Census Block Group	1
Census Block	1008
Census Tract	430902

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 Company Names on Record
Mailing Address	407 W VALLEY BLVD, 3, ALHAMBRA, CA 91803-3358
Owner Type	Company
Vesting	Life Tenant

Deeds, Mortgages & Sale History

Date	Document
May 29, 2026	Affidavit of Death of Trustee, Transfer
May 11, 2023	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 16, 1999 · Amount on Record
Deed Sale	Jun 16, 1999 · Amount on Record
Deed Document Number	19991105113
Last Transfer Date	Mar 24, 2023
Transfer Doc	0000307452
Record Updated	Oct 29, 2026

May 2026: Affidavit of Death of Trustee, Transfer

Document Type	Affidavit of Death of Trustee
Jurisdiction	LOS ANGELES CA
Recording Date	May 29, 2026
Property Address	903 DIAMOND ST, MONROVIA, CA 91016-3829
Document Number	0000395336
Instrument Date	May 22, 2026
Instrument	2026395336
Transaction Type	Transfer
Record Updated	Aug 29, 2026

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Life Tenant

May 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	May 11, 2023
Property Address	903 DIAMOND ST, MONROVIA, CA 91016-3829
Document Number	0000307452
Map Reference	MB 34 PG 41&42
Instrument Date	Mar 24, 2023
Instrument	23-0307452
Transaction Type	Transfer
Record Updated	May 26, 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	Living Trust
Address	907 DIAMOND ST, MONROVIA, CA 91016-3829

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	Monrovia City
Unified School District	Monrovia Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$639,599 (+2%) Land $327,794 Building $311,805
2025	$9,804.00 (+4.5%)	$627,059 (+4.04%) Land $321,367 Building $305,692
2023	$9,382.00 (+2.72%)	$602,712 Land $308,889 Building $293,823
2022	$9,134.00

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	MONROVIA-CITY, WATER DEPT. serves 37,931 people · EPA ID CA1910090
Water Source	Groundwater
Last State Inspection	Sep 2024
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 807 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Giggle Fiber Cable	1,000 / 40
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless · Fiber, DSL in parts of the area	100 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: Frontier, GeoLinks, Sonic Telecom.

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