San Bernardino County property record for 543 E Deerfield St, Ontario, CA 91761
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 2,532 sqft · built 2000 |
| Lot Size | 0.297 acres (12,938 sqft) |
| Owner | Company Name on File |
| Last Sale | $234,000 (Jan 2000) |
| Tax Bill | $3,934 (2025) |
| Flood Zone | Zone D (undetermined) |
| APN | 1051-531-24-0000 |
| Primary APN | 1051-531-24-0000 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,532 sqft Living Area |
| Gross Area | 3,113 sqft |
| 1st Floor Area | 1,338 sqft |
| 2nd Floor Area | 1,194 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2000 |
|---|---|
| Effective Year Built | Effective 2000 |
| Architectural Style | Conventional |
| Construction Type | Frame |
| Roof Material | Tile |
| Lot Area | 12,938 sqft (0.297 acres) |
| Garage Type | Attached |
| Garage Area | 581 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Patio/Porch |
| Porch Area | 110 sqft |
| Patio Area | 110 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 543 E DEERFIELD ST |
|---|---|
| City | ONTARIO |
| State | CA |
| Zip | 91761-8730 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TRACT 15925 LOT 16 BOOK 274 PAGE 81 |
| Legal Tract | 15925 |
| Legal Block | 3 |
| Legal Lot Number | 16 |
| Jurisdiction | SAN BERNARDINO CA |
| Township / Civil Division | ONTARIO |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 1804 |
543 E Deerfield St is owned by a company that acquired it in November 2006 and is owner-occupied.
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 | Company Name on File |
|---|---|
| Mailing Address | 543 E DEERFIELD ST, ONTARIO, CA 91761-8730 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Borrower in Default |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jan 7, 2000 · Amount on File |
| Deed Sale | Jan 7, 2000 · Amount on File |
| Deed Document Number | 20007429 |
| Last Transfer Date | Nov 7, 2006 |
| Transfer Doc | 0000776556 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 543 E Deerfield St was $3,934 with a homeowner's exemption.
Source: San Bernardino County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Bernardino County |
| Municipality | Ontario City |
| Unified School District | Chino Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $366,198 (+2%) Land $111,313 Building $254,885 | |
| 2025 | $3,934.00 Homeowner's exemption | $359,017 Land $109,130 Building $249,887 |
| 2023 | $3,721.00 (+0.65%) Homeowner's exemption | $345,075 Land $104,892 Building $240,183 |
| 2022 | $3,697.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 543 E Deerfield St in Zone D, where flood risk has not been studied.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026
| FEMA Flood Zone | Zone D undetermined · not studied |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 543 E Deerfield St 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.
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 687 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 |
| Starlink Satellite | 280 / 30 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Verizon.
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