1100 WILLOW RD
medical office · Northbrook · 60062
At a glance
1100 WILLOW RD in Northbrook, IL is listed on the Chicago / Cook County property roll as “medical office”, PIN 04231070080000. The roll records 4,980 sq ft of building area, a 2010 build year and an assessed value of $3,409,001.
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 | 04231070080000 |
| Site address | 1100 WILLOW RD |
| Land use (DOR) | 5-17 — medical office |
| Building area (actual) | 4,980 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 419,321 sq ft |
| Year built | 2010 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $3,409,001 |
Recorded owner (assessment roll)
WILLFA IL LLC
Owner mailing address: 10275 W HIGGINS #810, ROSEMONT, IL, 60018
2 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
- 1100 WILLOW RD
- City
- Northbrook
- ZIP
- 60062
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1100 WILLOW RD compare with other Chicago office buildings?
At 4,980 sq ft, 1100 WILLOW RD 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 $685 per square foot of building area, against $158 across all office floor area on the roll.
Does the owner of 1100 WILLOW RD hold other Chicago office property?
2 Chicago office properties (2 parcels, 168.4K sq ft) are recorded to 2 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 “medical office” mean for this parcel?
The Chicago / Cook County roll classifies PIN 04231070080000 as “medical office” (use code 5-17). 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 1100 WILLOW RD?
The recorded owner on the Chicago / Cook County assessment roll (current) is WILLFA IL LLC. Owner mailing address on file: 10275 W HIGGINS #810, ROSEMONT, IL, 60018.
What companies have offices at 1100 WILLOW RD?
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 1100 WILLOW RD?
The Chicago / Cook County roll records 4,980 sq ft of building area, a build year of 2010. It sits on a 419,321 sq ft lot.
What is the assessed value of 1100 WILLOW RD?
$3,409,001 on the Chicago / Cook County roll. Assessed values are taxable-roll figures, not market prices.
What is the PIN for 1100 WILLOW RD?
PIN 04231070080000, site address 1100 WILLOW RD, Northbrook. 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 1100 WILLOW RD
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 04231070080000.
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, “1100 WILLOW RD, Northbrook, IL (PIN 04231070080000)”, https://buildingcensus.com/offices/chicago/office-building-cd4fa65c (data as of September 20, 2026).