San Bernardino County property record for 831 S Mountain Ave, Ontario, CA 91762
| Property Type | Condominium |
|---|---|
| Details | 3 bd · 2.5 ba · 1,408 sqft · built 1979 |
| Lot Size | 0.095 acres (4,125 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $475,000 (Dec 2025) |
| Tax Bill | $3,389 (2025) |
| Deeds & Mortgages | Dec 2025 Sale & Mortgage Jul 2021 Transfer + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 1011-382-17-0000 |
| Primary APN | 1011-382-17-0000 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Stories | 2 Stories |
| Building Area | 1,408 sqft Living Area |
| Gross Area | 1,843 sqft |
| 1st Floor Area | 550 sqft |
| 2nd Floor Area | 858 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1979 |
| Architectural Style | Modern |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 4,125 sqft (0.095 acres) |
| Garage Type | Attached |
| Garage Area | 435 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 831 S MOUNTAIN AVE |
|---|---|
| City | ONTARIO |
| State | CA |
| Zip | 91762-4814 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Local Zoning Code | R |
| Legal Description | TRACT 10200 UNIT 6 AND INT IN COMMON AREA AS PER RECORD AND PURSUANT TO SEC 2188.5 OF REVENUE AND TAXATION CODE |
| Legal Subdivision | COTTAGE PARK |
| Legal Tract | 10200 |
| Legal Block | 3 |
| Legal Lot Number | 1 |
| Jurisdiction | SAN BERNARDINO CA |
| Township / Civil Division | ONTARIO |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 1706 |
Source: San Bernardino County records · APN 1011-382-17-0000
Assessment roll updated July 14, 2026 · Last verified July 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 File |
|---|---|
| Mailing Address | 18907 LANGSTON PL, ROWLAND HEIGHTS, CA 91748-4882 |
| Owner Type | Individual |
| Vesting | Community Property |
| Date | Document |
|---|---|
| Dec 05, 2025 | Grant Deed, Transfer · Conventional Mortgage A&D MORTGAGE LLC |
| Jul 19, 2021 | Intrafamily Transfer, Transfer |
| Jan 16, 2018 | Deed of Trust, Mortgage · Conventional Mortgage GRAND CASTLE INC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 05, 2025 · Amount on Record |
| Deed Sale | Dec 05, 2025 · Amount on Record |
| Prior Sale | Oct 16, 2014 · Amount on Record |
| Deed Document Number | 2025299038 |
| Prior Transfer Date | Jun 10, 2021 |
| Prior Transfer Doc | 0000323094 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN BERNARDINO CA |
| Recording Date | Dec 05, 2025 |
| Property Address | 831 S MOUNTAIN AVE, ONTARIO, CA 91762-4814 |
| Document Number | 0000299038 |
| Map Reference | MB 144 PG 87&88 |
| Instrument Date | Nov 20, 2025 |
| Instrument | 2025-0299038 |
| Transaction Type | Transfer |
| Record Updated | Dec 24, 2025 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATL TTL ORANGE CNT |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 18907 LANGSTON PL, ROWLAND HEIGHTS, CA 91748-4882 |
| Document Number | 0000299039 |
|---|---|
| Date | Dec 05, 2025 |
| Instrument | 2025-0299039 |
| Name | A&D MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jan 01, 2056 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SAN BERNARDINO CA |
| Recording Date | Jul 19, 2021 |
| Property Address | 831 S MOUNTAIN AVE, ONTARIO, CA 91762-4814 |
| Document Number | 0000323094 |
| Instrument Date | Jun 10, 2021 |
| Instrument | 2021-0323094 |
| Transaction Type | Transfer |
| Record Updated | Jul 30, 2021 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 84 687 ALA MAHLIU ST #130C # 130C, 130C, WAIANAE, HI 96792 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN BERNARDINO CA |
| Property Address | 831 S MOUNTAIN AVE, ONTARIO, CA 91762-4814 |
| Document Number | 0000017754 |
| Instrument Date | Jan 16, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Jan 30, 2018 |
| Title Company | TICOR TITLE COMPANY/CA |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 942 ABE WAY MONTEREY PARK CA 917554209, MONTEREY PARK, CA 91755-4209 |
| Document Number | 0000017754 |
|---|---|
| Date | Jan 18, 2018 |
| Instrument | 17754 |
| Name | GRAND CASTLE INC |
|---|---|
| Address | 667 BREA CANYON RD # 24, WALNUT, CA 91789-3011 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 180 Months |
| Due | Jan 17, 2033 |
Source: San Bernardino County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| 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) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $475,000 (+54.48%) Land $166,250 Building $308,750 | |
| 2025 | $3,389.00 (+5.28%) | $307,484 (+4.04%) Land $108,327 Building $199,157 |
| 2023 | $3,219.00 (+1.32%) | $295,545 Land $104,121 Building $191,424 |
| 2022 | $3,177.00 |
Source: FEMA National Flood Hazard Layer as of October 12, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: California Internet, Frontier, T-Mobile USA.
Based on FCC filings for 828 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | ONTARIO MUNICIPAL UTILITIES COMPANY serves 185,010 people |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Jul 2025 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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