Architecture Firms in the World

Top 9 Architecture Firms in the World 2020

An architectural firm is a company that provides architectural services to concerned customers. All the architectural firms have licensed architects who will design the infrastructure according to the scientific rules. Usually, the number of architects in each firm depends on its size. We have gone through the portfolio of many architecture firms and have found that the USA is more advanced than any other country as long as the number of architecture firms is concerned. Four of the top five firms are based in the USA. Japan, Sweden, Canada, and China share only one firm each in the list of top 9 architecture firms in the world 2020. 

Below is the list of top 9 architecture firms in the world 2020

Civil Engineer 9 is published in the top 9 architectural firms in today’s world.

01. Gensler Architecture firm

Website – Gensler

Company Overview:

  • Location: San Francisco, California, United States
  • Architects Employed: 2627
  • Architectural Revenue: 1.2 billion USD (2018)
  • Founded: 1965
  • Rank in 2018: 1
  • Rank in 2019: 1
  • Rank in 2020: 1
  • Notable Project: Dubai International Finance Centre, Shanghai Tower (Shanghai, China, 2016)

Gensler is the largest architecture firm in the world, based in the USA. It was founded in 1965 by Art Gensler, his wife Drue Gensler and James Follett. Gensler is serving customers from more than 100 countries with its offices in 16 countries and 48 cities worldwide. Gensler is considered to do the best architecture design. Its most notable projects are Shanghai Tower, The Coca-Cola Company Headquarters, The Washington Post, San Francisco International Airport, Dubai International Finance Centre, NVIDIA Corporate Campus, etc.

02. Nikken Sekkei

Website – Nikken Sekkei

Company Overview:

  • Location: Tokyo, Japan
  • Architects employed: 1869
  • Architectural Revenue: <$1 million USD
  • Founded: 1900
  • Rank in 2018: 2
  • Rank in 2019: 2
  • Rank in 2020: 2
  • Notable Project: Tokyo Tower, 1958

Nikken Sekkei is a Japanese architecture firm ranked #2 worldwide. It was founded in 1900. The firm has completed over 25,000 projects in more than 50 countries. The actual revenue of the firm is kept secret for strategic purposes. Its most notable projects are Tokyo Tower, Tokyo Dome, Cairo Opera House, Islamic Development Bank Headquarters, Queen’s Square Yokohama, Kyoto State Guest House, etc.


Website – AECOM

Company Overview:

  1. Location: Los Angeles, California, United States
  2. Architects employed: 1733
  3. Architectural Revenue: $600-699 million USD
  4. Founded: 1990
  5. Rank in 2018: 3
  6. Rank in 2019: 3
  7. Notable Project: Dubai Healthcare City, Tokyo Tower

AECOM is another USA based multinational architecture firm. It was founded in 1990. According to the Engineering News-Record magazine, AECOM holds the Number 1 position as Global Design Firm. Fortune magazine ranked AECOM as World’s Most Admired Companies in 2015, 2016 & 2017. The most notable projects of AECOM are the 2016 Summer Olympics, AT&T Stadium, Dubai Healthcare City, Logan International Airport, Los Angeles International Airport, Los Angeles Stadium at Hollywood Park, U.S. Army Information Technology Agency, and many others.

4. HDR Architecture

Website – HDR

Company Overview:

  • Location: Omaha, Nebraska, United States
  • Architects employed: 1491
  • Architectural Revenue: $370-379 million USD
  • Founded: 1917
  • Rank in 2018: 4
  • Rank in 2019: 4
  • Notable Project: Hoover Dam Bypass, Arizona-Nevada

HDR is the fourth largest architecture firm worldwide and third largest in the USA, based in Omaha, Nebraska, United States. It was founded in 1917. The firm has more than 10,000 professionals, 1491 of whom are architects. HDR is working in all 50 U.S. states and in 60 countries. The most notable projects of HDR are Hoover Dam Bypass, Historic Fourth Ward Park, Tappan Zee Bridge Replacement, Holland Performing Arts Center, etc.

5. Perkins and Will

Website – Perkings & Will

Company Overview:

  • Location: Chicago, Illinois, United States
  • Architects employed: 1148
  • Architectural Revenue: $390-395 million USD
  • Founded: 1935
  • Rank in 2018: 5
  • Rank in 2019: 5
  • Notable Project: Boeing International Headquarters

Perkins and Will is the fifth-largest architecture firm worldwide and fourth-largest in the USA. It was founded in 1935 in Chicago, Illinois, United States. This architecture firm has mainly focused on designing educational institutes. The most notable projects of Perkins+Will are Boeing International Headquarters, Chase Tower (Chicago), Cornell University College of Engineering, Crow Island School, Florida Atlantic University, International School of Beijing, University of Miami, University of Pennsylvania, University of Southern California, etc.

6. Sweco

Website – Sweco

Company Overview:

  • Location: Stockholm, Sweden
  • Architects employed: 1100
  • Architectural Revenue: 1.8 billion EUR
  • Founded: 1997
  • Rank in 2018: N/A (New)
  • Rank in 2019: 6
  • Notable Project: Stockholm City Line

Sweco is a Sweden based European architecture firm. It was not a very famous firm until 2019 when it became the sixth-largest architecture firm worldwide. The most notable projects of Sweco are Stockholm City Line, Kuwait Towers, Abu Simbel temples, Kuwait Water Towers, etc.

7. IBI Group

Website – IBI Group

Company Overview:

  • Location: Toronto, Canada
  • Architects employed: 862
  • Architectural Revenue: $230-239 million USD
  • Founded: 1974
  • Rank in 2018: 6
  • Rank in 2019: 7
  • Notable Project: Pioneer Village (TTC), Toronto

IBI Group is a Canada based architecture firm that has made it in the top list. It was founded in 1974 in Toronto, Canada. The firm became big after its merger and acquisition sprees since 2000. The most notable projects of IBI GROUP are Pioneer Village (TTC), 41 Cooper Square, BC Cancer Research Centre, Delta Hotel, Queen Elizabeth University Hospital, Victoria Park (TTC), and so on.

8. HOK Engineering Company

Website – HOK

Company Overview:

  • Location: St. Louis, Missouri, United States
  • Architects employed: 811
  • Architectural Revenue: $290-299 million USD
  • Founded: 1955
  • Rank in 2018: 7
  • Rank in 2019: 8
  • Notable Project: Dubai Marina, Apple Inc. (Houston Galleria)

HOK is the 8th largest architecture firm worldwide based in St. Louis, Missouri, United States. It was ranked 7th in 2018. It was founded in 1955 in St. Louis, Missouri, United States. The most notable projects of HOK are Apple Inc., Mercedes-Benz Stadium, King Saud University, Houston Galleria, Kellogg Company, Tokyo Telecom Center, Boeing Leadership Center, Dubai Marina, Kentucky International Convention Center Redevelopment, and many other projects.

9. Aedas

Website – Aedas

Company Overview:

  • Location: Hong Kong, China
  • Architects employed: 761
  • Architectural Revenue: $220-229 million USD
  • Founded: 2002
  • Rank in 2018: 8
  • Rank in 2019: 9
  • Notable Project: Boulevard Plaza

Aedas is the 9th largest architecture firm worldwide based in Hong Kong, China. It was founded in 2002 by the cooperation of British architecture firm Abbey Holford Rowe, LPT Architects of Hong Kong, and Peddle Thorp of Australia. The most notable projects of Aedas are Boulevard Plaza, Centres of Central (Hong Kong), Olympia 66, Xi’an Jiaotong-Liverpool University Central Building, etc.

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