San Bernardino County property record for 640 E Ralston St, Ontario, CA 91761
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,308 sqft · built 1928 |
| Lot Size | 0.14 acres (6,080 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $152,000 (Jul 2002) |
| Tax Bill | $2,356 (2025) |
| Deeds & Mortgages | Jul 2017 Loan Modification |
| Flood Zone | Zone X (minimal risk) |
| APN | 1049-503-09-0000 |
| Primary APN | 1049-503-09-0000 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,308 sqft Living Area |
| 1st Floor Area | 1,308 sqft |
| Family Room | Family Room |
| Year Built | Built 1928 |
|---|---|
| Effective Year Built | Effective 1928 |
| Architectural Style | Conventional |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Material | Built-Up Asphalt |
| Lot Area | 6,080 sqft (0.14 acres) |
| Lot Dimensions | 152 ft deep x 40 ft wide |
| Garage Type | Detached |
| Garage Area | 640 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Slab |
| Porch Area | 70 sqft |
| Patio Area | 70 sqft |
| Cooling System | Evaporative |
|---|---|
| Heating System | Floor/Wall Furnace |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 640 E RALSTON ST |
|---|---|
| City | ONTARIO |
| State | CA |
| Zip | 91761-3449 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 2441 LOT 37 |
| Legal Tract | 2441 |
| Legal Block | 3 |
| Legal Lot Number | 37 |
| Jurisdiction | SAN BERNARDINO CA |
| Township / Civil Division | ONTARIO |
| Census Block Group | 3 |
| Census Block | 3012 |
| Census Tract | 1813 |
Source: San Bernardino County records, as of August 31, 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 Record |
|---|---|
| Mailing Address | 640 E RALSTON ST, ONTARIO, CA 91761-3449 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Sole Owner |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 9, 2002 · Amount on Record |
| Deed Sale | Jul 9, 2002 · Amount on Record |
| Prior Sale | Jun 15, 2001 · Amount on Record |
| Deed Document Number | 2002352436 |
| Prior Transfer Date | Oct 24, 2000 |
| Prior Transfer Doc | 0000432012 |
| Record Updated | Oct 29, 2026 |
| Document Type | Loan Modification |
|---|---|
| Jurisdiction | SAN BERNARDINO CA |
| Property Address | 640 E RALSTON ST, ONTARIO, CA 91761-3449 |
| Document Number | 0000356955 |
| Instrument Date | Jul 31, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Sep 11, 2017 |
| Title Company | CORELOGIC-SOLUTIONS EXPRESS |
| Name | Verified Name |
|---|---|
| Address | 640 E RALSTON ST ONTARIO CA 91762, ONTARIO, CA 91762 |
| Document Number | 0000356955 |
|---|---|
| Date | Aug 31, 2017 |
| Instrument | 356955 |
| Name | NATIONSTAR MTG |
|---|---|
| Type | Mortgage Company |
| Address | COPPELL, TX 75019 |
| Type | Conventional with PMI |
|---|---|
| Amount | Amount Recorded |
| Term | 480 Months |
| Due | Aug 30, 2057 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 4.25% |
Source: San Bernardino County assessment roll, as of July 14, 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) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $224,550 (+2%) Land $59,093 Building $165,457 | |
| 2025 | $2,356.00 (+5.41%) Homeowner's exemption | $220,147 (+4.04%) Land $57,934 Building $162,213 |
| 2023 | $2,235.00 (+1.41%) Homeowner's exemption | $211,598 Land $55,684 Building $155,914 |
| 2022 | $2,204.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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.
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.
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 |
| 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.
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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