4641 E Guasti Rd, Ontario, CA 91761 Property Records

San Bernardino County property record for 4641 E Guasti Rd, Ontario, CA 91761

Property Summary

Property Type	Warehouse, Storage
Details	113,664 sqft · built 1988
Lot Size	5.5 acres (239,580 sqft)
Owner	2 Company Names on File
Tax Bill	$73,011 (2025)
Flood Zone	Zone X (minimal risk)
APN	`0238-042-27-0000`

Property Details

APN / Parcel Number

Primary APN	`0238-042-27-0000`

Interior

Building Area	113,664 sqft Gross Area

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Construction Type	Masonry / Concrete Block
Fire Resistance	Masonry Walls, Wood Interior
Lot Area	239,580 sqft
View / Lot	Average

Utilities, Heating & Cooling

Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	4641 E GUASTI RD
City	ONTARIO
State	CA
Zip	91761-8105
Property Category	Industrial
Property Type	Industrial > Warehouse, Storage
Legal Description	PARCEL MAP 10478 PARCEL 1
Legal Subdivision	ONTARIO
Legal Block	1
Jurisdiction	SAN BERNARDINO CA
Township / Civil Division	SAN BERNARDINO
Census Block Group	1
Census Block	1015
Census Tract	12700

Owner

Source: San Bernardino County assessment roll, as of July 14, 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 File
Mailing Address	1880 CENTURY PARK E, 607, LOS ANGELES, CA 90067-1622
Owner Type	Company
Vesting	Tenants in Common

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Dec 21, 2001
Deed Sale	Dec 21, 2001
Deed Document Number	2001584338
Last Transfer Date	Feb 10, 2006
Transfer Doc	0000106722
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: San Bernardino County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	San Bernardino County
Municipality	Ontario City
Secondary School District	Chaffey Joint Union High School District (09 - 12)
Elementary School District	Cucamonga Elementary School District (KG - 08)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$7,042,841 (+2%) Land $1,431,514 Building $5,611,327
2025	$73,011.00 (+5.19%)	$6,904,746 (+4.04%) Land $1,403,445 Building $5,501,301
2023	$69,410.00 (+1.85%)	$6,636,625 Land $1,348,947 Building $5,287,678
2022	$68,147.00

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

Flood

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	4 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; 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

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	ONTARIO MUNICIPAL UTILITIES COMPANY serves 185,010 people · EPA ID CA3610034
Water Source	Purchased surface water from several systems
Last State Inspection	Jul 2025
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 23 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
California Internet Fixed Wireless	1,000 / 1,000

May also be available: AT&T, Frontier, Inyo Networks, Spectrum, T-Mobile USA, Ultimate Internet Access, Verizon.