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434 W Ontario St
Chicago, IL 60654
Retail Property For Lease · 16,456 SF

Highlights

  • Prime River North location with strong proximity to dining, retail, and transportation amenities.
  • Mix of office and restaurant uses, including ground-floor retail/restaurant component.
  • Four-story heavy timber construction with classic Chicago loft character.
  • Located on a double lot in a dense urban corridor, enhancing long-term positioning and flexibility.

Property Overview

434 W Ontario Street is a four-story timber loft office building located in Chicago’s highly sought-after River North submarket. Originally constructed in the early 1920s, the property features classic masonry construction and approximately 24,800 SF of space configured for a mix of office and retail uses. The building is characterized by its heavy timber construction, exposed brick, and high ceilings, offering a distinctive loft-style environment appealing to creative and professional users. The asset supports multiple tenants, including office users and ground-floor retail/restaurant space, providing a diversified occupancy profile. Situated just west of Orleans Street, the property benefits from excellent access to I-90/94 via the Ohio Street feeder ramp and is within walking distance of CTA transit options, placing it in a highly accessible downtown location surrounded by retail, dining, and amenity-rich developments.

  • Restaurant
  • Security System
  • Reception
  • Air Conditioning

Property Facts

Building Type
Office
Year Built/Renovated
1920/1996
Building Height
4 Stories
Building Size
24,810 SF
Building Class
B
Typical Floor Size
4,792 SF
Unfinished Ceiling Height
12’
  • Listing ID: 40853265

  • Date on Market: 6/9/2026

  • Last Updated:

  • Address: 434 W Ontario St, Chicago, IL 60654

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