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300 West Adams Street Office Building
built 1927 and with current city data crediting Jens J. Jensen, Designated as a Chicago landmark on May 13, 2009. the public record begins with concrete facts and can move outward into commercial development and architectural branding.
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Quick Take
- Official status: Chicago individual landmark.
- Address: 300 W Adams St.
- Built: 1927.
- Architect: Jens J. Jensen.
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Why It Matters
300 West Adams Street Office Building stabilizes commercial development, architectural branding, and corridor and downtown change in one public landmark record.
That public anchor is what allows later work on ownership, alteration, neighborhood setting, and interpretation to build outward in a disciplined way.
Field Network
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Research Narrative
Landmark Context
300 West Adams Street Office Building is anchored to 300 W Adams St before any deeper archive work begins. City records connect the site to a construction date of 1927 and credits Jens J. Jensen. It was designated on May 13, 2009. 300 West Adams Street Office Building already ties commercial development, architectural branding, and corridor and downtown change to one real building before archival digging begins.
300 West Adams Street Office Building reveals more once fieldwork compares storefront depth, upper-floor expression, and corner treatment, how the facade addresses pedestrian traffic, and later signage, infill, or reuse. That kind of reading often reveals how commercial architecture stayed visible even as the economic life around it changed.
Research Starting Points
300 West Adams Street Office Building can be checked against trade press and city directories, permit files and assessor records, and historic photographs and newspaper coverage when the designation summary runs out. That is usually how a short landmark record turns into a fuller account of use, alteration, and neighborhood setting.
300 West Adams Street Office Building still needs deeper source work, but the landmark record already keeps that work tied to one place.
Public Actions
Campaign / Petition Record
Ordered oldest to newest.
1927
Development
Construction period recorded in city landmark data
by Public record Previous
Chicago's public landmark data records 300 West Adams Street Office Building as built in 1927.
May 13, 2009
Designation
Chicago individual landmark designation
by Public record Previous
City of Chicago designated 300 West Adams Street Office Building as an individual landmark on May 13, 2009.
February 2026
Inventory
City landmark address list and data portal record
by Public record Current
300 West Adams Street Office Building remains listed in Chicago's public individual-landmark address list and open-data record.
Signals
Latest Google News
Latest 3 stories
300 West Adams Street Office Building, Chicago, Illinois
Landmarks approves data center redevelopment at 300 W. Adams Urbanize Chicago
Open StoryLandmarks approves data center redevelopment at 300 W. Adams Urbanize Chicago
Open StoryResearch article pages show a recent coverage slice. Paid subscribers can use Signals inside the workspace for longer results and additional follow-up tools around the place.
Sources
Source Trail
City of Chicago Open Data: Individual Landmarks
dataset
Use for address, built date, architect, and point geometry in the city data portal.
Chicago Landmark Address List February 2026
institution
Use for address normalization and cross-checking the city's public landmark list.
Place Snapshot
- Place
- 300 West Adams Street Office Building
- Location
- 300 W Adams St, Chicago, Illinois
- Coverage
- Exact
Key Facts
- Region
- Chicago, Illinois / Midwest
- Place type
- Commercial Building
- Current status
- Preserved
- Address
- 300 W Adams St
- Built
- 1927
- Architect
- Jens J. Jensen
- Designated
- May 13, 2009
Design / Planning Timeline
Jens J. Jensen
1927
Milestone
Design architect or firm credited in current city landmark data
Use as a starting point for confirming authorship against permits, drawings, and later landmark reports.
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