San Bernardino County property record for 318 E Carlton St, Ontario, CA 91761
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,148 sqft · built 1924 |
| Lot Size | 0.175 acres (7,600 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $160,000 (Nov 2009) |
| Tax Bill | $2,278 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1049-343-05-0000 |
| Primary APN | 1049-343-05-0000 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,148 sqft Living Area |
| 1st Floor Area | 1,148 sqft |
| Year Built | Built 1924 |
|---|---|
| Effective Year Built | Effective 1924 |
| Architectural Style | Conventional |
| Construction Type | Frame |
| Roof Material | Built-Up Asphalt |
| Lot Area | 7,600 sqft (0.175 acres) |
| Lot Dimensions | 152 ft deep x 50 ft wide |
| Porch | Patio/Porch |
|---|---|
| Porch Area | 180 sqft |
| Patio Area | 180 sqft |
| Total Buildings | 2 Buildings |
| Cooling System | None |
|---|---|
| Heating System | Floor/Wall Furnace |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 318 E CARLTON ST |
|---|---|
| City | ONTARIO |
| State | CA |
| Zip | 91761-3305 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | V1LLA PLOTS SOUTH S1DE TR PTN LOTS 6 AND 7 BLK 136 BEG 149 FT 2 1/2 1NCHES E OF NW COR BLK 136 TH S 152.5 FT TH E 5O FT TH N 152.5 FT TH W 5O FT TO BEG |
| Legal Subdivision | VILLA PLOTS SOUTHSIDE |
| Legal Tract | P |
| Legal Block | 136 |
| Legal Lot Number | 6,7 |
| Jurisdiction | SAN BERNARDINO CA |
| Township / Civil Division | ONTARIO |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 1813 |
318 E Carlton St, a duplex, is owned and occupied by two individuals who bought it in November 2009.
Source: San Bernardino County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 318 E CARLTON ST, ONTARIO, CA 91761-3305 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 9, 2009 · Amount on File |
| Deed Sale | Nov 9, 2009 · Amount on File |
| Deed Document Number | 2009487343 |
| Prior Transfer Date | Jun 3, 1998 |
| Prior Transfer Doc | 0000218821 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 318 E Carlton St was $2,278 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 |
| 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 | $217,245 (+2%) Land $59,249 Building $157,996 | |
| 2025 | $2,278.00 Homeowner's exemption | $212,985 Land $58,087 Building $154,898 |
| 2023 | $2,161.00 (+1.41%) Homeowner's exemption | $204,714 Land $55,831 Building $148,883 |
| 2022 | $2,131.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 318 E Carlton St in Zone X, an area of minimal flood risk.
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.
The area around 318 E Carlton 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 300 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 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Verizon.
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