811 W WELLINGTON AVE
Office-Medical Office Buildings/Spaces · Chicago · 60657
At a glance
811 W WELLINGTON AVE in Chicago, IL is listed on the Chicago / Cook County property roll as “Office-Medical Office Buildings/Spaces”, PIN 14292180280000. The roll records 4,900 sq ft of building area, a 1955 build year and an assessed value of $1,006,000.
Public record — 0 matched business locations
Tenants & business locations
No active business locations at this address appear in the public records ingested so far. That is a statement about the records, not the building: tenants without a county business-tax receipt or a Florida registration at this address are invisible to public data.
Chicago / Cook County assessment roll
Parcel record
| Field | Value |
|---|---|
| PIN | 14292180280000 |
| Site address | 811 W WELLINGTON AVE |
| Land use (DOR) | 4-17 — Office-Medical Office Buildings/Spaces |
| Building area (actual) | 4,900 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 4,900 sq ft |
| Year built | 1955 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $1,006,000 |
Recorded owner (assessment roll)
ADVOCATE NORTHSIDE HLT
Owner mailing address: 2025 WINDSOR DR, OAKBROOK, IL, 60523
44 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
- 811 W WELLINGTON AVE
- City
- Chicago
- ZIP
- 60657
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 811 W WELLINGTON AVE compare with other Chicago office buildings?
At 4,900 sq ft, 811 W WELLINGTON AVE is less than a fifth 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 $205 per square foot of building area, against $158 across all office floor area on the roll.
Does the owner of 811 W WELLINGTON AVE hold other Chicago office property?
44 Chicago office properties (44 parcels, 994.7K sq ft) are recorded to 5 owner entities sharing this parcel's tax-bill mailing address. A shared mailing address is evidence of common ownership, not proof of it.
What does “Office-Medical Office Buildings/Spaces” mean for this parcel?
The Chicago / Cook County roll classifies PIN 14292180280000 as “Office-Medical Office Buildings/Spaces” (use code 4-17). 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 811 W WELLINGTON AVE?
The recorded owner on the Chicago / Cook County assessment roll (current) is ADVOCATE NORTHSIDE HLT. Owner mailing address on file: 2025 WINDSOR DR, OAKBROOK, IL, 60523.
What companies have offices at 811 W WELLINGTON AVE?
No business locations at this building appear in the public records ingested so far — no licence, tax or registry record currently lists this address; that is a gap in the record, not proof the building is empty.
How big is 811 W WELLINGTON AVE?
The Chicago / Cook County roll records 4,900 sq ft of building area, a build year of 1955. It sits on a 4,900 sq ft lot.
What is the assessed value of 811 W WELLINGTON AVE?
$1,006,000 on the Chicago / Cook County roll. Assessed values are taxable-roll figures, not market prices.
What is the PIN for 811 W WELLINGTON AVE?
PIN 14292180280000, site address 811 W WELLINGTON AVE, 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 811 W WELLINGTON AVE
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 14292180280000.
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, “811 W WELLINGTON AVE, Chicago, IL (PIN 14292180280000)”, https://buildingcensus.com/offices/chicago/office-building-2872885e (data as of September 20, 2026).