645 William St, Pomona, CA 91768 Property Records

Los Angeles County property record for 645 William St, Pomona, CA 91768

Property Summary

Property Type	Quadplex
Details	8 bd · 4 ba · 3,015 sqft · built 1985
Lot Size	0.16 acres (6,950 sqft)
Owner	2 Company Names on Record
Last Sale	$150,000 (Mar 1998)
Tax Bill	$5,099 (2025)
Deeds & Mortgages	May 2021 Transfer Jun 2018 Transfer
Flood Zone	Zone X (minimal risk)
APN	`8340-022-022`

Property Details

APN / Parcel Number

Primary APN	`8340-022-022`

Interior

Bedrooms	8 Beds
Full Baths	4 Baths
Units	4 Units
Building Area	3,015 sqft Living Area

Exterior

Year Built	Built 1985
Effective Year Built	Effective 1985
Architectural Style	Quadruplex
Construction Type	Wood
Lot Area	6,950 sqft (0.16 acres)

Utilities, Heating & Cooling

Cooling System	HVAC

Location & Zoning

Street Address	645 WILLIAM ST
City	POMONA
State	CA
Zip	91768-3558
Property Category	Residential
Property Type	Residential > Multi-Unit > Quadplex
Local Zoning Code	POR3*
Legal Description	GANESHA PARK TR W 50 FT EX OF ALLEY OF LOT 17 BLK I
Legal Subdivision	GANESHA PARK TRACT
Legal Tract	W
Legal Block	I
Legal Lot Number	17
Jurisdiction	LOS ANGELES CA
Township / Civil Division	EAST SAN GABRIEL VALLEY
Census Block Group	2
Census Block	2000
Census Tract	402304

Owner

Source: Los Angeles County records, as of May 21, 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	647 W ORANGE GROVE AVE, POMONA, CA 91768-2443
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Date	Document
May 19, 2021	Intrafamily Transfer, Transfer
Jun 20, 2018	Quit Claim Deed, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Mar 9, 1998 · Amount on Record
Deed Sale	Mar 9, 1998 · Amount on Record
Prior Sale	Dec 19, 1997 · Amount on Record
Deed Document Number	1998378650
Last Transfer Date	Apr 23, 2021
Transfer Doc	0000804521
Record Updated	Sep 20, 2026

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	LOS ANGELES CA
Recording Date	May 19, 2021
Property Address	645 WILLIAM ST, POMONA, CA 91768-3558
Document Number	0000804521
Map Reference	MB 14 PG 74&75
Instrument Date	Apr 23, 2021
Instrument	21-0804521
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	647 W ORANGE GROVE AVE, POMONA, CA 91768-2443

June 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	LOS ANGELES CA
Recording Date	Jun 20, 2018
Property Address	645 WILLIAM ST, POMONA, CA 91768-3558
Document Number	0000618905
Instrument Date	Apr 28, 2018
Instrument	618905
Transaction Type	Transfer
Record Updated	Jul 3, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Amount Accuracy	Full Value
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	634 WILLIAM ST POMONA CA 917683542, POMONA, CA 91768-3542

Tax Assessment & Valuation

Source: Los Angeles County assessment roll, as of May 21, 2026

Property Jurisdictions

Type	Name
State	California
County	Los Angeles County
Municipality	Pomona City
Unified School District	Pomona Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2025	$5,099.00 (+11.09%)	$282,686 (-44.24%) Land $139,370 Building $143,316
2024	$4,590.00 (+1.8%)
2023	$4,509.00 (-37.24%)	$506,928 Land $282,079 Building $224,849
2022	$7,185.00

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	POMONA - CITY, WATER DEPT. serves 151,713 people · EPA ID CA1910126
Water Source	Surface water
Lead	2 ppb (2023–2025) 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 516 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Frontier Fiber	7,000 / 7,000
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless · DSL in parts of the area	100 / 20

May also be available: GeoLinks, T-Mobile.

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