446 E ONTARIO ST
Office · Chicago · 60611
At a glance
446 E ONTARIO ST in Chicago, IL is listed on the Chicago / Cook County property roll as “Office”, PIN 17102050250000. The roll records 99,474 sq ft of building area, a 1985 build year and an assessed value of $25,888,109. It last sold for $225,116,958 in Dec 2016. 5 active business locations at this address appear in public records.
Recorded transfers — county roll + state sale file
Sale history
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Dec 2016 | $225,116,958 | not rated | County roll | — |
Prices are the consideration recorded in Chicago / Cook County's public property records. Where a qualification code exists it is the assessor's judgement of whether a transfer was arm's length; transfers without one appear unrated rather than assumed clean. Whether a building is on the market today, and at what price, is not a public record and is not shown here — asking prices, listings and lease terms live in private commercial databases.
Public record — 5 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| SONDER HOTEL | LOBBY FLRS 6 10 | Dec 2024 | Chicago business licence | address match · high |
| KINDERCARE LEARNING CENTERS | — | Oct 2014 | Chicago business licence | address match · high |
| MPA ONTERIE CENTER, LLC | — | Dec 2012 | Chicago business licence | address match · high |
| ONTERIE FITNESS CENTER | — | Mar 2011 | Chicago business licence | address match · high |
| INTERPARK | — | Aug 2006 | Chicago business licence | address match · high |
Chicago / Cook County assessment roll
Parcel record
| Field | Value |
|---|---|
| PIN | 17102050250000 |
| Site address | 446 E ONTARIO ST |
| Land use (DOR) | 597 — Office |
| Building area (actual) | 99,474 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 46,731 sq ft |
| Year built | 1985 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $25,888,109 |
Recorded owner (assessment roll)
AMERICAN HERITAGE INVE
Owner mailing address: 411 E ILLINOIS ST #80, CHICAGO, IL, 60611
3 Chicago office properties share this owner mailing address →
Commercial property is usually held one building per entity; a shared mailbox is how the roll reveals a portfolio. It is evidence of common ownership, not proof.
Location
- Address
- 446 E ONTARIO ST
- City
- Chicago
- ZIP
- 60611
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 446 E ONTARIO ST compare with other Chicago office buildings?
At 99,474 sq ft, 446 E ONTARIO ST is about 3 times the size of the average office building on the Chicago / Cook County roll, which comes to 36,812 sq ft across 9,438 buildings.
Its assessed value works out to $260 per square foot of building area, against $158 across all office floor area on the roll.
The last recorded sale priced it at $2263 per square foot.
Does the owner of 446 E ONTARIO ST hold other Chicago office property?
3 Chicago office properties (3 parcels, 199.9K sq ft) are recorded to an owner sharing this parcel's tax-bill mailing address. A shared mailing address is evidence of common ownership, not proof of it.
What has happened at 446 E ONTARIO ST recently?
1 recorded transfer is on file for this parcel, the latest dated Dec 2016.
What does “Office” mean for this parcel?
The Chicago / Cook County roll classifies PIN 17102050250000 as “Office” (use code 597). BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Frequently asked questions
Who owns 446 E ONTARIO ST?
The recorded owner on the Chicago / Cook County assessment roll (current) is AMERICAN HERITAGE INVE. Owner mailing address on file: 411 E ILLINOIS ST #80, CHICAGO, IL, 60611.
What companies have offices at 446 E ONTARIO ST?
5 active business locations at this building appear in Chicago / Cook County public records, including SONDER HOTEL, KINDERCARE LEARNING CENTERS, MPA ONTERIE CENTER, LLC, ONTERIE FITNESS CENTER, INTERPARK. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 446 E ONTARIO ST?
The Chicago / Cook County roll records 99,474 sq ft of building area, a build year of 1985. It sits on a 46,731 sq ft lot.
What is the assessed value of 446 E ONTARIO ST?
$25,888,109 on the Chicago / Cook County roll. Assessed values are taxable-roll figures, not market prices.
When did 446 E ONTARIO ST last sell?
The last recorded transfer was in Dec 2016 for $225,116,958 ($2263 per square foot).
What is the PIN for 446 E ONTARIO ST?
PIN 17102050250000, site address 446 E ONTARIO ST, Chicago. It is the key to look the parcel up in the Cook County Assessor parcel, commercial-valuation and sales datasets (Chicago / Cook County).
More around 446 E ONTARIO ST
- Chicago / Cook County office buildings· 9,438 buildings
- AMERICAN HERITAGE INVE· 3 properties
- SONDER HOTEL· suite LOBBY FLRS 6 10
- KINDERCARE LEARNING CENTERS· tenant on record
- MPA ONTERIE CENTER, LLC· tenant on record
- ONTERIE FITNESS CENTER· tenant on record
- Federal office leases in IL
- Office census — all metros
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Chicago / Cook County — Cook County Assessor parcel, commercial-valuation and sales datasets (owner names, mailing addresses, priced sales with buyer and seller); City of Chicago active business licences for occupancy. Licence addresses are street-level, and state-licensed professions are absent from the city roll.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
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Dataset updated . Source: Chicago / Cook County assessment roll, PIN 17102050250000.
About this data
Source: Cook County Assessor parcel, commercial-valuation and sales datasets (Chicago / Cook County), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “446 E ONTARIO ST, Chicago, IL (PIN 17102050250000)”, https://buildingcensus.com/offices/chicago/office-building-4aa65632 (data as of September 20, 2026).