Public Research

Tree Studios, Annexes and Courtyard

Tree Studios, Annexes and Courtyard is a concise public starting point for public landscape design and shared civic space, anchored by Chicago's landmark designation.

Tree Studios, Annexes and Courtyard 601-23 N State St/4-10 E Ohio St/3-7 E Ontario St, Chicago, Illinois Precision: Exact

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Quick Take

  • Official status: Chicago individual landmark.
  • Address: 601-23 N State St/4-10 E Ohio St/3-7 E Ontario St.
  • Built: 1894.
  • Architect: Parfitt Brothers, with Bauer & Hill.

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Why It Matters

Tree Studios, Annexes and Courtyard keeps public landscape design, shared civic space, and neighborhood identity grounded in one address and one building.

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

Tree Studios, Annexes and Courtyard is anchored to 601-23 N State St/4-10 E Ohio St/3-7 E Ontario St before any deeper archive work begins. The designation record holds onto a construction date of 1894 and credits Parfitt Brothers, with Bauer & Hill. It was designated on February 26, 1997. Tree Studios, Annexes and Courtyard gives researchers a way to connect public landscape design, shared civic space, and neighborhood identity to one actual site.

Tree Studios, Annexes and Courtyard becomes materially clearer through pathways, edges, and planting structure, relationships between open space and surrounding buildings, and later redesign or maintenance shifts. That kind of fieldwork helps clarify how open space holds public memory even as planting, paving, or surrounding uses change.

Research Starting Points

Tree Studios, Annexes and Courtyard starts to deepen once research reaches park or planning reports, historic photographs and atlases, and newspaper coverage and community records. Those materials are usually what turn site observation into a more convincing historical record.

Tree Studios, Annexes and Courtyard 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.

1894

Development

Construction period recorded in city landmark data

Chicago's public landmark data records Tree Studios, Annexes and Courtyard as built in 1894.

February 26, 1997

Designation

Chicago individual landmark designation

City of Chicago designated Tree Studios, Annexes and Courtyard as an individual landmark on February 26, 1997.

February 2026

Inventory

City landmark address list and data portal record

Tree Studios, Annexes and Courtyard remains listed in Chicago's public individual-landmark address list and open-data record.

Sources

Source Trail

Chicago Landmark Name List 2025.6

institution

Use for official landmark status and naming.

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
Tree Studios, Annexes and Courtyard
Location
601-23 N State St/4-10 E Ohio St/3-7 E Ontario St, Chicago, Illinois
Coverage
Exact

Key Facts

Region
Chicago, Illinois / Midwest
Place type
Landscape / Public Space
Current status
Preserved
Address
601-23 N State St/4-10 E Ohio St/3-7 E Ontario St
Built
1894
Architect
Parfitt Brothers, with Bauer & Hill
Designated
February 26, 1997

Design / Planning Timeline

Parfitt Brothers, with Bauer & Hill
1894

Milestone

Use as a starting point for confirming authorship against permits, drawings, and later landmark reports.

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