Cook County Building
118 N Clark St, Chicago, IL 60602
20% provisional source coverage
USE BOUNDARYNot verified · Not dispatch ready
The Cook County Building at 118 North Clark is the County portion of Chicago's jointly designated City Hall–County Building landmark. Cook County identifies it as a County-owned-and-operated 638,592-square-foot facility, while the City landmark record distinguishes its 1908 completion from the City Hall portion completed in 1911.
Canonical identity
This Public Seed keeps the County and City portions distinct while documenting the shared landmark scope, County facilities relationship and partial public office locations. It preserves conflicting year and area values and does not convert public office hours or government occupancy into visitor, vendor or dispatch rules.
Area claims stay separate
Gross, rentable, and office area are not interchangeable. Factum stores each measurement with its source meaning instead of choosing a convenient single number.
What public guidance supports
These are sourced research answers, not permission to enter, reserve, submit, or dispatch. Current affected-party authorization remains required.
Landmark scope
The landmark pairs 121 North LaSalle and 118 North Clark, but the City record distinguishes the County Building from the later City Hall portion.
Official City landmark record reviewed August 15, 2026County facilities relationship
Cook County Facilities Management lists the County Building among facilities it maintains. This is a portfolio responsibility, not an on-site dispatch route.
Current County page captured August 15, 2026Public office locations
Several County offices publish room locations at 118 North Clark. These are partial occupancy facts and do not define building access or vendor procedures.
Current official office pages captured August 15, 2026Questions this record answers
Each concise answer includes the same caveats shown elsewhere on the page.
01Is the Cook County Building the same as Chicago City Hall?+
They share a designated landmark structure, but this record covers the County portion at 118 North Clark. The City portion at 121 North LaSalle remains distinct.
02Are County office hours building-access rules?+
No. Public service hours do not establish screening, entrance, delivery, contractor or dispatch authorization.
03How can I improve this record?+
Submit a current public building guide, dock/freight notice, move rule or COI package and choose public-display, verification-only or private-retention permission. Contributions enter evidence review.
Explicit unknowns
Anything operationally material that is stale, incomplete, or unconfirmed remains visible here.
- 01Official parcel/PIN, legal-title boundary and exact division between County and City portions.
- 02Resolution of the 1906 administrative year and 1908 historic completion claims.
- 03Resolution of the 638,592 and approximately 627,000-square-foot figures.
- 04Current on-site building manager, chief engineer, security and after-hours contacts.
- 05Visitor screening, entrance, dock, delivery, freight, move and work-window procedures.
- 06COI, vendor, contractor, labor, life-safety, emergency and telecom/riser requirements.
Evidence register
Source links are direct. Authority and supported claim groups are stated so readers can inspect the underlying record.
- 01City Hall–County Building landmark record ↗
City of Chicago · Supports: Paired landmark scope, architect and distinct County/City completion history
- 02Cook County 2024 Energy and Water Benchmarking Report ↗
Cook County Bureau of Asset Management · Supports: County-owned-and-operated facility status, 638,592-square-foot area and 2023 data vintage
- 03Cook County Facilities Management ↗
Cook County · Supports: Portfolio maintenance relationship and current leadership; not on-site dispatch authority
- 04Cook County Asset Management Committee record ↗
Cook County · Supports: June 11, 2025 capital/restacking program evidence