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6331 Thunder Mountain Ave, Rancho Cucamonga, CA 91739 Property Records

San Bernardino County property record for 6331 Thunder Mountain Ave, Rancho Cucamonga, CA 91739

Property Summary

Property TypeSingle Family Home
Details3 bd · 2 ba · 1,749 sqft · built 1997
Lot Size0.165 acres (7,200 sqft)
Owner2 Trust Names on File
Last Sale$905,000 (Nov 2025)
Tax Bill$3,635 (2025)
Deeds & MortgagesNov 2025 Sale
May 2023 Transfer
Flood ZoneZone X (minimal risk)
APN0225-501-72-0000

Property Details

APN / Parcel Number

Primary APN0225-501-72-0000

Interior

Bedrooms3 Beds
Full Baths2 Baths
Total Rooms6 Rooms
Stories1 Story
Building Area1,749 sqft Living Area
Gross Area2,347 sqft
1st Floor Area1,749 sqft
Family RoomFamily Room
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1997
Effective Year BuiltEffective 1997
Architectural StyleModern
Construction TypeFrame
Roof MaterialTile
Lot Area7,200 sqft (0.165 acres)
View / LotAverage
Garage TypeAttached
Garage Area598 sqft
Parking Spaces2 Parking Spaces
PorchPatio/Porch
Porch Area305 sqft
Patio Area305 sqft

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address6331 THUNDER MOUNTAIN AVE
CityRANCHO CUCAMONGA
StateCA
Zip91739-2349
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionTRACT 13835 LOT 72 BOOK 262 PAGE 14
Legal Subdivision262M14
Legal Tract13835
Legal Block3
Legal Lot Number72
JurisdictionSAN BERNARDINO CA
Township / Civil DivisionONTARIO
Census Block Group3
Census Block3000
Census Tract2021

Owner

6331 Thunder Mountain Ave is owner-occupied and held in a trust since November 2025.

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

Owner of Record2 Trust Names on File
Mailing Address6331 THUNDER MOUNTAIN AVE, RANCHO CUCAMONGA, CA 91739-2349
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust, Revocable Trust

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

Deeds, Mortgages & Sale History

DateDocument
Nov 12, 2025Grant Deed, Transfer
STOCKDALE TITLE COMPANY, SOCAL TITLE COMPANY
May 30, 2023Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleNov 12, 2025 · Amount on File
Deed SaleNov 12, 2025 · Amount on File
Prior SaleFeb 28, 1997 · Amount on File
Deed Document Number2025278227
Prior Transfer DateNov 5, 2025
Prior Transfer Doc0000278226
Record UpdatedSep 20, 2026

November 2025: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionSAN BERNARDINO CA
Recording DateNov 12, 2025
Property Address6331 THUNDER MOUNTAIN AVE, RANCHO CUCAMONGA, CA 91739-2349
Document Number0000278227
Map ReferenceMB 262 PG 14-18
Instrument DateNov 3, 2025
Instrument2025-0278227
Transaction TypeTransfer
Record UpdatedDec 4, 2025
Title CompanySTOCKDALE TITLE COMPANY, SOCAL TITLE COMPANY

Transaction

AmountAmount on Record
Tax$0.00
Amount AccuracyRounded by County
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address6331 THUNDER MOUNTAIN AVE, RANCHO CUCAMONGA, CA 91739-2349

May 2023: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionSAN BERNARDINO CA
Recording DateMay 30, 2023
Property Address6331 THUNDER MOUNTAIN AVE, RANCHO CUCAMONGA, CA 91739-2349
Document Number0000130259
Map ReferenceMB 262 PG 14-18
Instrument DateMay 23, 2023
Instrument2023-0130259
Transaction TypeTransfer
Record UpdatedJun 21, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipRevocable Trust
Address6331 THUNDER MOUNTAIN AVE, RANCHO CUCAMONGA, CA 91739-2349

Tax Assessment & Valuation

The 2025 property tax bill for 6331 Thunder Mountain Ave was $3,635.

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

Property Jurisdictions

TypeName
StateCalifornia
CountySan Bernardino County
MunicipalityRancho Cucamonga City
Secondary School DistrictChaffey Joint Union High School District (09 - 12)
Elementary School DistrictEtiwanda Elementary School District (KG - 08)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$872,100 (+197.5%) Land $306,000 Building $566,100
2025$3,635.00 Homeowner's exemption$293,147 Land $73,291 Building $219,856
2023$3,380.00 (+1.29%) Homeowner's exemption$281,764 Land $70,445 Building $211,319
2022$3,337.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 6331 Thunder Mountain 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 ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies1 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

Wildfire risk around 6331 Thunder Mountain Ave is moderate, ranking above 40% of the US, with a 0.07% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskModerate
above 40% of the US · lower than 76% of California
Wildfire Likelihood0.07% annual chance
ExposureNone
beyond 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 SystemCUCAMONGA VALLEY WATER DISTRICT
serves 213,375 people · EPA ID CA3610018
Water SourceSurface water
Last State InspectionFeb 2025
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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 429 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Spectrum
Cable		1,000 / 1,000
T-Mobile
Fixed Wireless		100 / 20

May also be available: AT&T, Verizon.

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