San Bernardino County property record for 3281 E Guasti Rd, Ontario, CA 91761
| Property Type | Commercial Office |
|---|---|
| Details | 510,940 sqft · built 1992 |
| Lot Size | 6.66 acres (290,327 sqft) |
| Owner | Company Name on Record |
| Last Sale | $36,850,000 (Nov 2017) |
| Tax Bill | $443,702 (2025) |
| Deeds & Mortgages | Nov 2017 Sale & Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 0210-551-19-0000 |
| Primary APN | 0210-551-19-0000 |
|---|
| Units | 36 Units |
|---|---|
| Stories | 8 Stories |
| Building Area | 510,940 sqft Gross Area |
| Elevator | Elevator |
| Year Built | Built 1992 |
|---|---|
| Effective Year Built | Effective 1992 |
| Construction Type | Steel Frame |
| Fire Resistance | Fireproof Steel Frame |
| Lot Area | 290,327 sqft |
| View / Lot | Airport |
| Parking Spaces | 455 Parking Spaces |
| Total Buildings | 4 Buildings |
| Sewer | Municipal |
|---|---|
| Water Source | Commercial |
| Street Address | 3281 E GUASTI RD |
|---|---|
| City | ONTARIO |
| State | CA |
| Zip | 91761-7622 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | PARCEL MAP 10010 PARCEL 5 AND PARCEL MAP 11057 PARCEL 9 DESC AS FOLL BEG MOST NLY COR PARCEL 9 TH S 44 DEG 58 MIN 07 SECOND E 578 FT ALG NELY LI SD PARCEL 9 AND SD PARCEL 5 TO BEG TANGENT CURVE CONCAVE SWLY HAVING RADIUS 50 FT TH SELY ALG CURVE AND N |
| Legal Subdivision | PARCEL MAP 11057 |
| Legal Block | 1 |
| Jurisdiction | SAN BERNARDINO CA |
| Township / Civil Division | SAN BERNARDINO |
| Census Block Group | 1 |
| Census Block | 1042 |
| Census Tract | 12700 |
Source: San Bernardino County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 3800 CONCOURS, 300, ONTARIO, CA 91764-5907 |
| Owner Type | Company |
| Vesting | Sole Owner |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 17, 2017 · Amount on Record |
| Deed Sale | Nov 17, 2017 · Amount on Record |
| Prior Sale | Nov 30, 2006 |
| Deed Document Number | 2017491468 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN BERNARDINO CA |
| Recording Date | Nov 17, 2017 |
| Property Address | 3281 E GUASTI RD, ONTARIO, CA 91761-7622 |
| Document Number | 0000491468 |
| Map Reference | DOC1989-375118 |
| Instrument Date | Nov 10, 2017 |
| Instrument | 2017-0491468 |
| Transaction Type | Transfer |
| Record Updated | Aug 31, 2021 |
| Title Company | FATCO |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 3800 CONCOURS, ONTARIO, CA 91764-5904 |
| Document Number | 0000491469 |
|---|---|
| Date | Nov 17, 2017 |
| Instrument | 2017-0491469 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Address | OAKLAND, CA 94612 |
| Type | Line of Credit |
|---|
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 | Cucamonga Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $42,767,595 (+2%) Land $6,061,740 Building $36,705,855 | |
| 2025 | $443,702.00 (+5.19%) | $41,929,014 (+4.04%) Land $5,942,882 Building $35,986,132 |
| 2023 | $421,804.00 (+1.86%) | $40,300,860 Land $5,712,113 Building $34,588,747 |
| 2022 | $414,121.00 |
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 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 4 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.8% of the US · lower than 99.8% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond 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 17 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ultimate Internet Access Fiber | 8,000 / 8,000 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, T-Mobile, Verizon.
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