6391 Onyx Ave, Alta Loma (Rancho Cucamonga), CA 91701 Property Records

San Bernardino County property record for 6391 Onyx Ave, Alta Loma, CA 91701

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 2,040 sqft · built 1976
Lot Size	0.244 acres (10,647 sqft)
Owner	Individual Name on File
Last Sale	$765,000 (Feb 2021)
Tax Bill	$9,163 (2025)
Deeds & Mortgages	Feb 2019 Second Mortgage Feb 2021 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1062-581-52-0000`

Property Details

APN / Parcel Number

Primary APN	`1062-581-52-0000`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	2,040 sqft Living Area
Gross Area	2,546 sqft
1st Floor Area	2,040 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1976
Effective Year Built	Effective 1977
Architectural Style	Modern
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Tile
Lot Area	10,647 sqft (0.244 acres)
Lot Dimensions	117 ft deep x 91 ft wide
Garage Type	Attached
Garage Area	506 sqft
Parking Spaces	2 Parking Spaces

Exterior Amenities

Pool Type	Pool with Hot Tub/Spa
Porch	Patio/Porch
Porch Area	296 sqft
Patio Area	512 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	6391 ONYX AVE
City	RANCHO CUCAMONGA
State	CA
Zip	91701-4152
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TRACT 9171 LOT 14
Legal Subdivision	TRACT NO 9171
Legal Tract	9171
Legal Block	1
Legal Lot Number	14
Jurisdiction	SAN BERNARDINO CA
Township / Civil Division	ONTARIO
Census Block Group	1
Census Block	1001
Census Tract	2013

Owner

6391 Onyx Ave is owned and occupied by an individual who bought it in February 2021.

Source: San Bernardino County records, as of July 14, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on File
Mailing Address	6391 ONYX AVE, RANCHO CUCAMONGA, CA 91701-4152
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Sole Owner

Deeds, Mortgages & Sale History

Date	Document
Feb 25, 2019	Deed of Trust, Mortgage · Stand-Alone Second Mortgage THE FIRST FINANCIAL FCU
Feb 24, 2021	Grant Deed, Transfer · Conventional Mortgage FAIRWAY INDEPENDENT MORTGAGE CORP
Jul 29, 2020	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Feb 24, 2021 · Amount on File
Deed Sale	Feb 24, 2021 · Amount on File
Prior Sale	Oct 15, 2013 · Amount on File
Deed Document Number	202186683
Prior Transfer Date	Mar 25, 2020
Prior Transfer Doc	0000260883
Record Updated	Sep 20, 2026

February 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN BERNARDINO CA
Property Address	6391 ONYX AVE, ALTA LOMA, CA 91701-4152
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	PROVIDENT TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000057319
Date	Feb 25, 2019
Instrument	2019-0057319

Lender

Name	THE FIRST FINANCIAL FCU
Type	Credit Union
Address	WEST COVINA, CA 91790

Agreement

Type	Stand-Alone Second Mortgage
Amount	Amount on Record
Term	241 Months
Due	Mar 15, 2039

February 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN BERNARDINO CA
Recording Date	Feb 24, 2021
Property Address	6391 ONYX AVE, ALTA LOMA, CA 91701-4152
Document Number	0000086683
Map Reference	MB 127 PG 71&72
Instrument Date	Feb 5, 2021
Instrument	2021-0086683
Transaction Type	Transfer
Record Updated	Aug 31, 2021
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

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

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	6391 ONYX AVE, RANCHO CUCAMONGA, CA 91701-4152

Mortgage

Document Number	0000086684
Date	Feb 24, 2021
Instrument	2021-0086684

Lender

Name	FAIRWAY INDEPENDENT MORTGAGE CORP
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Mar 1, 2051

July 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN BERNARDINO CA
Recording Date	Jul 29, 2020
Property Address	6391 ONYX AVE, ALTA LOMA, CA 91701-4152
Document Number	0000260883
Instrument Date	Mar 25, 2020
Instrument	260883
Transaction Type	Transfer
Record Updated	Aug 19, 2020
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	6391 ONYX AVE RANCHO CUCAMONGA CA 917014152, RANCHO CUCAMONGA, CA 91701-4152

Tax Assessment & Valuation

The 2025 property tax bill for 6391 Onyx Ave was $9,163.

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$844,623 (+2%) Land $211,156 Building $633,467
2025	$9,163.00 Homeowner's exemption	$828,062 Land $207,016 Building $621,046
2023	$8,731.00 (+0.24%) Homeowner's exemption	$795,907 Land $198,977 Building $596,930
2022	$8,710.00

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

Flood

FEMA maps place 6391 Onyx Ave in Zone X, an area of minimal flood risk.

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	1 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

The area around 6391 Onyx Ave has no burnable land within ember reach, so its wildfire risk is not rated.

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	CUCAMONGA VALLEY WATER DISTRICT serves 213,375 people · EPA ID CA3610018
Water Source	Surface water
Last State Inspection	Feb 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 435 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
AT&T Fixed Wireless	100 / 20

May also be available: Frontier, GeoLinks, T-Mobile, Verizon.

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