644 E Ralston St, Ontario, CA 91761 Property Records

San Bernardino County property record for 644 E Ralston St, Ontario, CA 91761

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 1,108 sqft · built 1957
Lot Size	0.07 acres (3,040 sqft)
Owner	2 Individual Names on Record
Last Sale	$167,000 (Nov 2010)
Tax Bill	$2,289 (2025)
Deeds & Mortgages	Sep 2017 Mortgage Jun 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1049-503-10-0000`

Property Details

APN / Parcel Number

Primary APN	`1049-503-10-0000`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	5 Rooms
Stories	1 Story
Building Area	1,108 sqft Living Area
1st Floor Area	1,108 sqft
Family Room	Family Room

Exterior

Year Built	Built 1957
Effective Year Built	Effective 1957
Architectural Style	Conventional
Construction Type	Frame
Roof Material	Built-Up Asphalt
Lot Area	3,040 sqft (0.07 acres)
Lot Dimensions	76 ft deep x 40 ft wide

Utilities, Heating & Cooling

Cooling System	None
Heating System	Floor/Wall Furnace
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	644 E RALSTON ST
City	ONTARIO
State	CA
Zip	91761-3449
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TRACT 2441 N 1/2 LOT 36
Legal Subdivision	TRACT NO 2441
Legal Tract	2441
Legal Block	3
Legal Lot Number	36
Jurisdiction	SAN BERNARDINO CA
Township / Civil Division	ONTARIO
Census Block Group	3
Census Block	3012
Census Tract	1813

Owner

Source: San Bernardino County records, 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 Individual Names on Record
Mailing Address	644 E RALSTON ST, ONTARIO, CA 91761-3449
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Sep 20, 2017	Deed of Trust, Mortgage · Conventional Mortgage MOUNTAIN WEST FINANCIAL INC
Jun 7, 2021	Deed of Trust, Mortgage · Conventional Mortgage MOUNTAIN WEST FINANCIAL INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Nov 23, 2010 · Amount on Record
Deed Sale	Nov 23, 2010 · Amount on Record
Prior Sale	Jul 30, 2010 · Amount on Record
Deed Document Number	2010498538
Prior Transfer Date	Dec 15, 2009
Prior Transfer Doc	0000575443
Record Updated	Oct 29, 2026

September 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN BERNARDINO CA
Property Address	644 E RALSTON ST, ONTARIO, CA 91761-3449
Transaction Type	Mortgage
Record Updated	Jul 22, 2022
Title Company	ORANGE COAST TITLE CO

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000388316
Date	Sep 20, 2017
Instrument	2017-0388316

Lender

Name	MOUNTAIN WEST FINANCIAL INC
Type	Funding / Finance Company
Address	REDLANDS, CA 92374

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Oct 1, 2047

June 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN BERNARDINO CA
Property Address	644 E RALSTON ST, ONTARIO, CA 91761-3449
Transaction Type	Mortgage
Record Updated	Jul 22, 2022
Title Company	ORABGE COAST TITLE, ORANGE COAST TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	644 E RALSTON ST, ONTARIO, CA 91761-3449

Mortgage

Document Number	0000258477
Date	Jun 7, 2021
Instrument	2021-0258477

Lender

Name	MOUNTAIN WEST FINANCIAL INC
Type	Mortgage Company
Address	REDLANDS, CA 92374

Agreement

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

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	Ontario-Montclair School District (KG - 08)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$218,235 (+2%) Land $78,407 Building $139,828
2025	$2,289.00 (+5.44%) Homeowner's exemption	$213,956 (+4.04%) Land $76,870 Building $137,086
2023	$2,171.00 (+1.4%) Homeowner's exemption	$205,648 Land $73,885 Building $131,763
2022	$2,141.00

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

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	Low lower than 97% of the US · lower than 97.8% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	Direct burnable vegetation

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

Provider	Max Down / Up (Mbps)
Frontier Fiber	7,000 / 7,000
Spectrum Cable	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
Starlink Satellite	280 / 30
AT&T Fixed Wireless	100 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks.

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