CTBUH Silver Member

Salas O'Brien


Member Since: 2018

Member Offices: Atlanta, Austin, Boston, Calgary, Chicago, Cincinnati, Columbus, Dallas, Denver, Houston, Irvine, Minneapolis, New Orleans, Oakland, Oklahoma City, Orlando, Ottawa, Phoenix, Raleigh, Rochester, Sacramento, San Diego, San Jose, Seattle, Toronto, Washington D.C.

Website: http://www.salasobrien.com/

Salas O’Brien is an employee-owned firm providing building and facility solutions to clients across the United States. Our team of engaged experts focuses on achieving high quality, great relationships, and a sustainable future.

We help clients in a variety of industries by providing mechanical and electrical engineering as well as consulting for district utilities, site planning, technology, fire protection, industrial process engineering, architecture, and more. Our specialized experience includes design for data centers, healthcare, science and technology, high-rise buildings, clean energy, education, and other building types.

Fields of Expertise

Architecture; Building Automation Control Systems; Civil Engineering; Fire Engineering; Historical Preservation; Mechanical, Electrical & Plumbing; Structural Engineering

Membership details

Membership Level


Member Since


Member Offices

  • Atlanta

  • Austin

  • Boston

  • Calgary

  • Chicago

  • Cincinnati

  • Columbus

  • Dallas

  • Denver

  • Houston

  • Irvine

  • Minneapolis

  • New Orleans

  • Oakland

  • Oklahoma City

  • Orlando

  • Ottawa

  • Phoenix

  • Raleigh

  • Rochester

  • Sacramento

  • San Diego

  • San Jose

  • Seattle

  • Toronto

  • Washington D.C.




Architecturally Topped Out

Structurally Topped Out

Under Construction

On Hold



Never Completed


Competition Entry


Proposed Renovation

Under Renovation


Under Demolition



Trump International Hotel & Tower

423.2 m / 1,389 ft


Doosan Haeundae We've the Zenith Tower A

300 m / 984 ft


Doosan Haeundae We've the Zenith Tower B

281.5 m / 924 ft


Doosan Haeundae We've the Zenith Tower C

265 m / 869 ft


One Bennett Park

254.9 m / 836 ft


The Legacy at Millennium Park

249.3 m / 818 ft


300 North LaSalle

239.1 m / 785 ft


River East Center

196.3 m / 644 ft


Millennium Centre

185.9 m / 610 ft


The Clare

179.5 m / 589 ft

Building Completions Timeline


Global News

13 August 2019

Glass-Clad Mixed-Use Tower to Replace Old Brick Building in Chicago

Just weeks after securing a zoning change from city officials, developer Sterling Bay is moving forward with its plans to demolish an older building on...

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Global News

30 April 2019

Two Towers Progress onto Chicago’s Iconic Skyline

Vista Tower reached its final height on April 26 2019, when construction workers poured concrete to form the Chicago skyscraper’s 101st and final floor. That...

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Global News

28 March 2019

Chicago to See a New Skyscraper on Michigan Avenue

One of Chicago’s busiest real estate developers wants to build a 47-story residential and hotel tower on a stretch of North Michigan. Sterling Bay is...

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Associated companies

Salas O'Brien (2020)


150 m+ Buildings

300 m+ Buildings

Average Building Age*

9 Years

Most Common Function*

Residential (75%), 27 Buildings

Most Common Material*

Concrete (86%), 32 Buildings

* Based on 150 m+ buildings currently in the database.

Total: 36 Buildings for which a function has been assigned.
Total: 37 Buildings for which a material has been assigned.

*Based on 37 Completed & Under Construction Buildings

Building Completions Timeline


Construction Time Chart

NOTE: Construction start time is not available for all buildings. The average construction time is only displayed if there is three or more buildings with construction start and complete data in that year.