Chicago / Cook County office buildings — the public record
Every office-class parcel in Chicago / Cook County — who owns it and what the assessor values it at, what it last sold for and which businesses the public record places inside. Built exclusively from government data: 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. No listing sites, no scraping — every page cites its sources.
🔒 Create a free account to export CSV · every Chicago office parcel: owner, use code, floors, area, assessed value
Most locations on record
Companies across Chicago offices
The skyline, by the county roll
Notable office buildings
| Building | Submarket | Floors | Sq ft | Built | Assessed | Recorded owner | Tenants |
|---|---|---|---|---|---|---|---|
| Willis Tower | Chicago | — | 4.7M | 1973 | $1.2B | PROPERTY TAX | 40 |
| The Merchandise Mart | Chicago | — | 4.3M | 1934 | $851.2M | MERCHANDISE MART OWNER | 0 |
| Aon Center | Chicago | — | 3.5M | 1984 | $632.9M | 601 W COMPANIES LLC | 18 |
| One Prudential Plaza | Chicago | — | 3.1M | 1954 | $559.7M | WANXIANG STERLING LLC | 14 |
| The Old Post Office | Chicago | — | 2.8M | 1919 | $897.1M | 601 W CO CHICAGO LLC | 7 |
| 30 S WACKER DR | Chicago | — | 2.6M | 1983 | $604.7M | PROP MGMT 30 S WACKER | 12 |
| Chase Tower | Chicago | — | 2.4M | 1967 | $429M | JPMORGAN CHASE BANK NA | 1 |
| 551 HIGGINS RD | Hoffman Estates | — | 2.4M | — | $227.6M | Sears- Prop Tax | 0 |
| 300 E RANDOLPH ST | Chicago | — | 2.3M | 1996 | $526.6M | — | 5 |
| 25 S WACKER DR | Chicago | — | 2M | 2002 | $401.8M | 71 S WACKER DRIVE HOLD | 0 |
| 500 W MADISON ST | Chicago | — | 1.9M | 1987 | $412.4M | KBS REIT III | 45 |
| 600 W CHICAGO AVE | Chicago | — | 1.9M | 1940 | $285M | CW 600 W CHICAGO LL | 16 |
| 227 W MONROE ST | Chicago | — | 1.8M | 1986 | $383.3M | 227 MONROE STREET LLC | 12 |
| 131 S DEARBORN ST | Chicago | — | 1.8M | 2002 | $380M | — | 3 |
| 141 W JACKSON BLVD | Chicago | — | 1.8M | 1930 | $206.3M | BD OF TRADE CTY CHGO | 0 |
| 1 N WACKER DR | Chicago | — | 1.7M | 2001 | $349.1M | HINES ONE N WACKER LP | 9 |
| 300 W JACKSON BLVD | Chicago | — | 1.6M | 1989 | $326.2M | WALTON 311 WACKER INV | 0 |
| 135 S LA SALLE ST | Chicago | — | 1.6M | 1934 | $150.8M | 135 S LASALLE PROP LLC | 9 |
| 70 W MADISON ST | Chicago | — | 1.6M | 1982 | $327.4M | 3 FNP OWNER LLC | 13 |
| 300 N LA SALLE ST | Chicago | — | 1.6M | 2008 | $466.1M | 300 N LASALLE LLC | 5 |
| 500 W MONROE ST | Chicago | — | 1.6M | 1992 | $275.1M | PIEDMONT 500 WEST MONR | 7 |
| 330 N WABASH AVE | Chicago | — | 1.6M | 1975 | $375.2M | PRIME GROUP REALTY | 43 |
| 110 N WACKER DR | Chicago | — | 1.5M | 2020 | $536.5M | RIVERSIDE ID | 5 |
| 350 N ORLEANS ST | Chicago | — | 1.5M | 1975 | $287.5M | BRE RIVER NORTH POINT | 21 |
| 310 S CANAL ST | Chicago | — | 1.5M | 2022 | $532.7M | NATL RR PASSENGER CORP | 0 |
| 111 SW WACKER DR | Chicago | — | 1.5M | 2002 | $292.5M | 111 S WACKER LLC JLL | 0 |
| 233 N MICHIGAN AVE | Chicago | — | 1.5M | 1970 | $241M | IC 233 BUILDING CO LLC | 24 |
| 175 W JACKSON BLVD | Chicago | — | 1.5M | 1911 | $218.1M | 175 JACKSON LLC | 24 |
| 353 N CLARK ST | Chicago | — | 1.4M | 2008 | $422.1M | HART 353 N CLARK LLC | 3 |
| 875 N MICHIGAN AVE | Chicago | — | 1.4M | 1970 | $214.1M | JHTC HOLDINGS LLC | 22 |
| Salesforce Tower Chicago | Chicago | — | 1.4M | 2023 | $486.3M | HINES | 2 |
| 333 S WABASH AVE | Chicago | — | 1.4M | 1973 | $206M | 333 WABASH PTRNS LLC | 4 |
| 155 North Wacker | Chicago | — | 1.4M | 2010 | $262.8M | JBC 155 LLC | 9 |
| 2000 W Ameritech Dr | Chicago | — | 1.4M | 1992 | $195.3M | — | 0 |
| 400 W LAKE ST | Chicago | — | 1.4M | 2018 | $449.4M | CBRE SUITE 2530 | 0 |
| 1 S WACKER DR | Chicago | — | 1.4M | 1982 | $294.4M | — | 11 |
| 1 ALLSTATE PLZ NORTH | Northbrook | — | 1.3M | 2000 | $95.6M | — | 0 |
| 55 E MONROE ST | Chicago | — | 1.3M | 1973 | $233.6M | PR EAST MONROE LLC | 12 |
| 184 W LAKE ST | Chicago | — | 1.3M | 1985 | $147.1M | JRTC HOLDINGS LLC | 0 |
| 35 W WACKER DR | Chicago | — | 1.3M | 1990 | $305.8M | WELLS OPERT PTS LLC | 12 |
Building names are editorial labels for well-known towers; all facts are the county's. Assessed values are the taxable-roll figures — not market prices.
Owner entities grouped by mailing address
Largest office landlords
| Owner | Mailing address | Properties | Floor area | Assessed | Tenants |
|---|---|---|---|---|---|
| B9 FAULKNER OWNER LLC · 7 entities | CHICAGO, IL | 12 | 11.4M sq ft | $2.5B | 332 |
| IC 111 BUILDING CO LLC · 3 entities | NEW YORK, NY | 3 | 3.1M sq ft | $526.1M | 32 |
| 227 MONROE STREET LLC | CHICAGO, IL | 2 | 2.9M sq ft | $526.3M | 17 |
| MICHIGAN PLAZA LLC | BUFFALO, NY | 2 | 2.3M sq ft | $440.9M | 29 |
| 3 FNP OWNER LLC · 2 entities | GREAT NECK, NY | 2 | 2.2M sq ft | $403M | 20 |
| MARC REALTY · 2 entities | CHICAGO, IL | 11 | 2.2M sq ft | $223.8M | 39 |
| GAEDEKE HOLDINGS IX LLC · 2 entities | SANTA ANA, CA | 2 | 2.3M sq ft | $487.4M | 45 |
| ILLINOIS BELL PROP TAX | ST LOUIS, MO | 23 | 1.9M sq ft | $190.4M | 5 |
| 33 WEST MONROE ASSOC · 2 entities | NEW YORK, NY | 2 | 1.7M sq ft | $222.2M | 3 |
Commercial property is usually held one building per entity, so the roll shows many owners where there is one sponsor. Grouping owner entities by the mailing address the county sends the tax bill to is what reveals the holding — evidence of common ownership, not proof of it, since a shared mailbox can also be a law firm, an accountant or a tax servicer. Each page says which case it looks like. Counted by building, not parcel.
Federal lease inventory — actual rent paid
The one rent figure that is public
Across 58 active federal office leases in Miami-Dade, the median rent is $36.36 per rentable square foot per year, with the middle half between $31 and $43. Asking rents are proprietary; the federal government publishes what it actually pays, lease by lease, and those leases appear on the building pages they belong to. One tenant is not a market — federal space is often agency-fitted and leased on government terms.
Every federal office lease in Florida, and when it expires →
Whole-building transfers over $1M
Recently sold office buildings
| Building | Submarket | Sold | Price | $/sq ft | Sq ft |
|---|---|---|---|---|---|
| 2600 FORBS AVE | Hoffman Estates | Aug 2026 | $10,210,000 | $113 | 90.6K |
| 5340 W 159TH ST | Oak Forest | Aug 2026 | $3,181,205 | $413 | 7.7K |
| 1124 FLORENCE AVE | Evanston | Jul 2026 | $1,100,000 | $189 | 5.8K |
| 3768 N CLARK ST | Chicago | Jul 2026 | $1,300,000 | $590 | 2.2K |
| 807 N WESTERN AVE | Chicago | Jul 2026 | $1,300,000 | $457 | 2.8K |
| 600 W FULTON ST | Chicago | Jun 2026 | $17,600,000 | $75 | 236K |
| 601 W RANDOLPH ST | Chicago | Jun 2026 | $6,250,000 | $58 | 108.1K |
| 131 S DEARBORN ST | Chicago | Jun 2026 | $97,000,000 | $55 | 1.8M |
| 1201 W LAKE ST | Chicago | Jun 2026 | $40,000,000 | $224 | 178.6K |
| 50 BURR RIDGE RD | Burr Ridge | May 2026 | $1,500,000 | $406 | 3.7K |
| 1040 W NORTHWEST HWY | Mount Prospect | May 2026 | $1,550,000 | $79 | 19.7K |
| 209 W RANDOLPH ST | Chicago | May 2026 | $6,562,500 | $27 | 244.4K |
| 2014 W BELLE PLAINE AVE | Chicago | May 2026 | $1,900,000 | $350 | 5.4K |
| 35 S PROSPECT AVE | Park Ridge | May 2026 | $1,175,000 | $188 | 6.3K |
| 200 N WELLS ST | Chicago | May 2026 | $4,262,500 | $355 | 12K |
| 165 W CENTRAL RD | Schaumburg | May 2026 | $1,875,000 | $32 | 59.1K |
| 212 W OHIO ST | Chicago | May 2026 | $3,000,000 | $127 | 23.6K |
| 106 N ABERDEEN ST | Chicago | Apr 2026 | $1,540,000 | $253 | 6.1K |
| 5550 MEADOWBROOK DR | Rolling Meadows | Apr 2026 | $2,000,000 | $55 | 36.3K |
| 1645 BIRCHWOOD AVE | Des Plaines | Apr 2026 | $1,498,921 | $98 | 15.3K |
Countywide
Office stock by city
| City | Office buildings | Floor area | Assessed | Active tenants |
|---|
Data provenance — public records only
- Miami-Dade County Property Appraiser — assessment roll — Parcel identity, site address, recorded owner, use code, areas, year built and assessed values, via the county's public GIS services (MD_LandInformation, PaGis layer).
- Miami-Dade County Local Business Tax roll — Business-tax receipts: business name, premises address (incl. suite/floor), account status and start date, via the county's public GIS services.
- Florida Division of Corporations (Sunbiz) — corporate data file — Registered entities: document number, status, filing date, registered agent and principal address, from the state's public quarterly data file.
- Miami-Dade County Property Appraiser — recorded sale — The last recorded transfer price and date for the parcel, from the county's public property point view.
- Florida Department of Revenue — Sale Data File — Every transfer in the current roll period with the property appraiser's sale qualification code, vacant/improved code, multi-parcel flag and the clerk's recording reference.
- U.S. General Services Administration — lease inventory — Active federal leases published monthly: annual rent actually paid, rentable square feet, effective and expiration dates, termination right, renewal options remaining and the lessor's name.
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.
Dataset updated . Chicago / Cook County is one metro of the office-intelligence census; each additional one is a data binding to another jurisdiction's records, not a new build.