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Skidmore, Owings & Merrill

Skidmore, Owings & Merrill LLP (SOM) is an American architectural, urban planning and engineering firm. It was founded in 1936 by Louis Skidmore and Nathaniel Owings in Chicago. In 1939, they were joined by engineer John Merrill. The firm opened its second office, in New York City, in 1937 and has since expanded, with additional offices in San Francisco, Los Angeles, Washington, D.C., London, Melbourne, Hong Kong, Shanghai, Seattle, and Dubai.

Company type

1936 (1936), in Chicago, Illinois, U.S.

Chicago, Illinois, U.S.

Worldwide

Mustafa Abadan, William F. Baker, Thomas Behr, Keith Boswell, Carrie Byles, Larry Chien, Leo Chow, Brant Coletta, Chris Cooper, Paul Danna, Mark Sarkisian, Michael Duncan, Scott Duncan, Laura Ettelman, Xuan Fu, T.J. Gottesdiener, Gary Haney, Craig Hartman, Kent Jackson, Colin Koop, Kenneth Lewis, Adam Semel, Jonathan Stein, Douglas Voigt

$347 million (2021)

The firm's notable current work includes the new headquarters for The Walt Disney Company,[1] the global headquarters for Citigroup,[2] Moynihan Train Hall and the expanded Penn Station complex,[3] and the restoration and renovation of the Waldorf Astoria in New York City;[4] airport projects at O'Hare International Airport,[5] Kansas City International Airport,[6] and Kempegowda International Airport; urban master plans for the Charenton-Bercy district in Paris, New Covent Garden in London, Treasure Island in San Francisco, the East Riverfront in Detroit; P.S. 62, the first net-zero-energy school in New York City;[7] and the design of the Moon Village, a concept for the first permanent lunar settlement, developed with the European Space Agency and Massachusetts Institute of Technology.[8] Notable for its role as a pioneer of modernist architecture in America and for its groundbreaking work in skyscraper design and construction, SOM has designed some of the world's most significant architectural and urban projects including several of the tallest buildings in the world: John Hancock Center (1969, second tallest in the world when built), Willis Tower (1973, tallest in the world for over twenty years), One World Trade Center (2014, currently the seventh tallest in the world), and Burj Khalifa (2010, currently the world's tallest building).[9]


SOM's multidisciplinary practice works across a range of scales and project types, providing services in architecture, building services/MEP engineering, digital design, graphics, interior design, structural engineering, civil engineering, sustainable design and urban design & planning.[10]

History and influence[edit]

Early works[edit]

The firm's first influential project was Lever House, completed in 1952 to become the first International Style office building in New York City. Constructed of glass and steel at a time when Park Avenue was lined with masonry buildings, Lever House introduced a modernist aesthetic that embodied the spirit of the times and influenced an entire generation of high-rise construction. As architectural historian Reyner Banham wrote in 1962, "It gave architectural expression to an age just as the age was being born ... Lever House was an uncontrollable success, imitated and sometimes understood all over the Americanized world, and one of the sights of New York".[11] In 1982, the New York City Landmarks Preservation Commission designated Lever House an official landmark.[12]


SOM's work in New York City included the Manufacturers Trust Company Building, completed in 1954 as the first International Style bank building in the United States,[13] and the Pepsi-Cola World Headquarters, completed in 1960. Architectural historian Henry-Russell Hitchcock called the Pepsi building "the ultimate in refinement of proportion and elegance of materials," while New York Times critic Ada Louise Huxtable placed it "at the top of the list, with Seagram and Lever House, of the city's few modern landmarks."[12] The following year saw the completion of One Chase Manhattan Plaza (later 28 Liberty Street), the first International Style building to rise in New York City's Financial District.[14] The project is noted for helping to turn the tide of a corporate exodus to Midtown Manhattan and the suburbs and reasserted Lower Manhattan as a viable business district after years of decline.[15] SOM's design for 28 Liberty Street also transformed the crowded streetscape of the Financial District by creating a plaza surrounding the tower, a novel concept that would be adapted in many future projects.[16]


Another example of SOM's modernist works is found in Colorado Springs, Colorado, where SOM planned a campus for the U.S. Air Force Academy. Built between 1958 and 1968, the campus broke from the traditions of West Point and Annapolis to become the first U.S. military academy designed in the modern style.[17] The centerpiece of the campus is the Cadet Chapel, designed by architect Walter Netsch. The American Institute of Architects awarded the building with its prestigious Twenty-five Year Award, conferred onto "a building that has set a precedent for the last 25 to 35 years and continues to set standards of excellence for its architectural design and significance" .[18]

Sustainable design[edit]

SOM has a long history in sustainable architecture and design. In 1969, SOM founder Nathaniel Owings wrote, "Civilizations leave marks on the Earth by which they are known and judged. In large measure, the nature of their immortality is gauged by how well their builders made peace with the environment." (source: Nathaniel Owings, "The American Aesthetic," Harper & Row, 1969) This ethos has shaped the firm's journey into sustainable practices. An early example is the corporate headquarters it designed for timberland company Weyerhaeuser, completed in 1971, which has been called the "original green building" not only for its integration into the surrounding landscape, but also for its use of efficient building systems. Another milestone in large-scale sustainable architecture was the completion of the U.S. Census Bureau Headquarters in 2007, the first federal office building to receive LEED certification. Like Weyerhaeuser, the design of the campus works in concert with its natural surroundings and incorporates a range of design strategies to reduce its environmental impact.


In 2015, SOM completed the first net-zero-energy school building in New York City and one of the first worldwide. The Kathleen Grimm School for Leadership and Sustainability at Sandy Ground, Staten Island,[19] has been awarded for its sustainability performance by organizations including the American Institute of Architects, the Municipal Art Society, and Urban Land Institute. SOM has been recognized for its research and experimentation with new energy-saving and carbon-reducing technologies, such as a timber tower[20] and a modified concrete slab design.[21]

High-rise innovation[edit]

In the 1970s, SOM pioneered a new era of skyscraper design with its work in Chicago, including the John Hancock Center (completed 1970) and Willis Tower (formerly Sears Tower), which became the world's tallest structure upon its completion in 1973 and remained so for more than 20 years. Both towers are the result of collaboration between architect Bruce Graham and engineer Fazlur Rahman Khan, who is often considered to be the greatest structural engineer of the 20th century. Khan invented a tubular framing system that made it possible to build higher than ever before. This system has been adapted and is still used today for some of the world's most recent tallest buildings, including the 828-meter-tall Burj Khalifa, designed by SOM and completed in 2010.

Digital design innovation[edit]

In the 1960s and 1970s, SOM was an early leader in computer-aided design, developing in-house digital tools that preceded the CAD systems used widely today. This work quickly proved valuable in the generation of structural analysis tools that were embraced by Fazlur Khan and his engineering team, aiding the design of projects such as the John Hancock Center.


The activity of an experimental research group at SOM known as the Computer Group exemplifies a particularly productive effort within the firm to incorporate technological research into its practice. Through the 1970s and 1980s, members of the relatively small, dedicated group pushed to integrate the computer's enhanced data-storing and analytical abilities into various phases of the design process. Through these initiatives, SOM was able to identify the potential of the computer to not only expedite necessary calculations but also introduce new ways of representing and sharing information. Just as structural engineering came to be seen early on at SOM as a means of generating rather than simply realizing architectural ideas, with concerted effort, computers gained credence at the firm, and eventually throughout the industry, as a catalyst for architectural innovation. In 1980, an in-house team at SOM created Architecture Engineering Systems, a computer program that was used to study complex structural systems and energy demands.[22] This program is regarded as a precursor to the array of building information modeling (BIM) tools now used by the profession.

Integrating art and architecture[edit]

For decades, many of SOM's projects have featured works of art by significant artists. In many cases, the firm's architects and engineers played a role in commissioning, engineering, and installing the artworks—such as with the Chicago Picasso, a 50-foot-tall steel sculpture in the city's civic center. Joan Miró, Alexander Calder, Isamu Noguchi, Harry Bertoia, Richard Lippold, Jean Dubuffet and Chryssa are among the artists whose work has been a part of SOM projects. More recently, SOM's architects and engineers have collaborated with artists such as James Turrell, Janet Echelman, Iñigo Manglano–Ovalle, James Carpenter, and Jaume Plensa.

Awards[edit]

Throughout its history, SOM has been recognized with more than 2000 awards for quality and innovation.[52] In November of 1990, SOM was placed on the cover of Interior Design Magazine for The Top Ten, Winner Of IBA. In 1996 and 1962, SOM received the Architecture Firm Award[53] from the American Institute of Architects, which recognizes the design work of an entire firm. SOM is the only firm to have received this honor twice. In August 2009 SOM received four of 13 available R+D Awards from Architect Magazine.[54][55][56][57] In addition, a collaboration between SOM and Rensselaer Polytechnic Institute, The Center for Architecture, Science and Ecology, was honored with a fifth award.[58]

Disciplines[edit]

Urban design and planning[edit]

Since the firm's founding, SOM has led large-scale urban design and planning projects. Many of these projects have had a lasting role in the development of cities and urban areas in America and the world, including London, Chicago, New York City, Washington, D.C., Baltimore, Denver, and Portland, Oregon. SOM's City Design practice has made influential contributions to urban design approaches such as transit-oriented development, overbuild strategies and sustainable urbanism. In 1942, SOM was hired by the U.S. Army Corps of Engineers for a highly confidential project: the planning of Oak Ridge, Tennessee. By 1945, the town was home to 75,000 people. The work at Oak Ridge prepared SOM to take on the large-scale architectural and planning projects that would define the postwar era.


For more than 20 years, SOM was involved in the development of a master plan for the National Mall in Washington, D.C. In 1962, President John F. Kennedy appointed Nathaniel Owings as chair of the Pennsylvania Avenue redesign council, and the resulting 1966 Washington Mall Master Plan laid the framework for a dynamic, inviting, and pedestrian-friendly place. A second master plan developed in 1973, envisioned the construction of major cultural facilities, including the National Air and Space Museum, the Hirshhorn Museum and Sculpture Garden, and the National Gallery of Art Sculpture Garden. In Baltimore in the 1960s, SOM played a pivotal role in preventing the destruction of the city's historic districts and Inner Harbor to make way for the planned construction of an elevated highway. As the chair of a team to develop an alternate plan, Nathaniel Owings convinced the Federal Highway Administration to sign off on a plan to reroute the highway. It was eventually built around the harbor and the historic Federal Hill district, saving these irreplaceable neighborhoods.


In the 1970s, SOM collaborated with landscape architect Lawrence Halprin to plan and design the Portland Transit Mall. The goals were to revitalize the Oregon city's downtown area, to encourage the use of mass transit, and create walkable streets. The Transit Mall helped to change the perception of downtown Portland. As one of the first projects of its kind in the United States, it helped to usher in an era of streetscape design that prioritizes people. Another important commission in the 1970s was as the lead design firm for the Boston Transportation Planning Review, a metropolitan-wide re-design of Boston's entire transit and roadway infrastructure.


Beginning in the 1980s, SOM planned the design and construction of Canary Wharf in London. Intended to accommodate a flourishing financial sector and revitalize London's former Docklands, the plan included more than 20 building sites and a host of public spaces and amenities. The plan also provided for a robust transportation network including a light rail station that connects to the London Underground. The massive scale of the project led to the opening of SOM's London office in 1986. The firm's work at Canary Wharf continued into the new millennium, with the completion of Five Canada Square in 2002. In central London, the opportunity to build above rail lines near Liverpool Street Station spurred the construction of Broadgate, a new business district. SOM devised the master plan, and over three decades designed several of the site's 14 buildings. In order to build high-rise structures atop one of the city's busiest stations and its railyard, SOM's structural engineering team devised a deck over the tracks to allow for various building configurations on top. Exchange House, completed in 1990, is a building that acts as a bridge spanning the tracks. In 2008, Broadgate Tower, the district's tallest building, was completed. SOM also designed public space enhancements for the area.


SOM designed the master plan for Chicago's Millennium Park, which opened in 2004 and has become one of the city's most visited attractions. Constructed above bus lanes, parking garages, and a rail yard, Millennium Park can be considered the world's largest roof garden. Below the great lawn, two new levels of parking were built, bus stops were added, and rail stations were renovated and expanded, including Millennium Station. The project revitalized a formerly blighted downtown site and marked the completion of Chicago planner Daniel Burnham's 100-year vision for the area.


In Denver, SOM was commissioned to expand and transform the city's historic Union Station into a major regional hub. 20 acres of former rail yards have been converted into a transit-oriented urban district that orchestrates light rail, pedestrian, bicycle, and bus routes, as well as commuter and intercity rail. Completed in 2014, the project has spurred more than $3.5 billion worth of private investment in the surrounding district.[59]

Structural engineering[edit]

The earliest SOM engineer was John O. Merrill.[60] Fazlur Khan, another engineer at SOM, is best known for his design and construction of the Willis Tower (formerly the Sears Tower), and John Hancock Center and for his designs of structural systems that remain fundamental to all high-rise skyscrapers.[61] Indeed, Khan is responsible for developing the algorithms that made the Hancock building and many subsequent skyscrapers possible. Another notable SOM engineer is Bill Baker, who is best known as the engineer of Burj Khalifa (Dubai, 2010), the world's tallest man-made structure. To support the tower's record heights and slim footprint, he developed the "buttressed core"[62] structural system, consisting of a hexagonal core reinforced by three buttresses that form a Y shape.

Interior design[edit]

Davis Allen, a pioneer in corporate interior design, had a forty-year tenure at SOM.[63] The designer of the iconic Andover chair, Allen was an institution in "the profession he helped to establish—the total design of the interior corporate environment with furniture, art, and functional and decorative objects integrated into a comprehensively planned space."[64]

Milan, Italy (ongoing)

Milan Olympic Village

Newark, New Jersey (ongoing)

Newark Liberty International Airport

Gothenburg, Sweden (ongoing) (clear 2024)

Karlatornet

Jinan, China (ongoing)

Greenland Shandong International Financial Center

Belgrade, Serbia 2023

Belgrade Tower

Busan, South Korea (ongoing)

Busan Lotte Town Tower

Bangkok, Thailand (ongoing)

One Bangkok

Xi'an, China (ongoing)

Greenland Centre

Dubai, United Arab Emirates (ongoing)

Burj Jumeirah

Taipei, Taiwan (ongoing)

Taipei Twin Towers

New York City, 2020

Moynihan Train Hall

renovation, 2020

United Nations Office at Geneva

Busan, South Korea, 2019

Haeundae LCT The Sharp

Singapore, 2018

Guoco Tower

London, England, 2018

The Stratford / Manhattan Loft Gardens

The Milstein Center, New York City, 2018

Barnard College

Innovation Partnership Building, Storrs, Connecticut, 2018

University of Connecticut

Brussels, Belgium, 2017

NATO Headquarters

Master Plan, New York City,

Cornell Tech

London, 2016

Chronicle Tower

Center for Character and Leadership Development, Colorado Springs, Colorado, 2016

U.S. Air Force Academy

Chinatown Branch, Chicago, Illinois, 2015

Chicago Public Library

San Francisco, 2015

350 Mission Street

New York City, 2014

One World Trade Center

Denver, Colorado, 2014

Denver Union Station

– Terminal 2, Mumbai, India, 2014

Chhatrapati Shivaji Maharaj International Airport

– Dubai, United Arab Emirates, 2013

Cayan Tower

The New School, New York City, 2013

University Center

Guangzhou, China, 2013

Pearl River Tower

Kuwait City, Kuwait, 2011

Al Hamra Tower

New York City, 2011

John Jay College of Criminal Justice

Dubai, United Arab Emirates, 2010

Burj Khalifa

Nanjing, China, 2010

Zifeng Tower

Washington, D.C., 2008

Smithsonian National Museum of American History

Oakland, California, 2008

Cathedral of Christ the Light

China, 2008

U.S. Embassy, Beijing

Terminal 1, 2008

Toronto Pearson International Airport

Terminal 3, Changi, Singapore, 2007

Changi International Airport

Tokyo, Japan, 2007

Tokyo Midtown

New York City, 2006

7 World Trade Center

New York City, 2004

Time Warner Center

Master Plan, Shanghai, China, 2004

Chongming Island

Upper School, Greenwich, Connecticut, 2002

Greenwich Academy

Master Plan, Chicago, 2002

Millennium Park

New York City, 2002

383 Madison Avenue

Tel Aviv, Israel, 2002

Ben Gurion International Airport

International Arrivals Building, Terminal 4, New York City, 2001

John F. Kennedy International Airport

International Terminal, San Francisco, 2000

San Francisco International Airport

(formerly Pavilhão Atlântico) Lisbon, Portugal, 1998

Altice Arena

Shanghai, 1998

Jin Mao Tower

New York City, 1990

1540 Broadway

New York City, 1989

One Worldwide Plaza

Boston, Massachusetts, 1986

Rowes Wharf

Redevelopment, Washington, D.C., 1986

National Mall

Seoul, South Korea, 1985

63 Building

Improvement Project, 1985

Northeast Corridor

Washington, D.C., 1984

Demonet Building

Minneapolis, Minnesota, 1982[65]

Hubert H. Humphrey Metrodome

King Abdul Aziz International Airport, Jeddah, Saudi Arabia, 1981

Hajj Terminal

Cleveland, 1980

PNC Center (Cleveland)

San Francisco, 1980

Louise M. Davies Symphony Hall

Calgary, Alberta, 1979

First Canadian Centre

White Plains, New York, 1977

Texaco Headquarters

Tehran, 1974

Azadi Stadium

(formerly Sears Tower), Chicago, 1974

Willis Tower

Houston, Texas, 1972

One Shell Plaza

Buffalo, New York, 1972

Seneca One Tower

New Orleans, Louisiana, 1972

One Shell Square

Federal Way, Washington, 1971

Weyerhaeuser Corporate Headquarters

and Printing Plant, Columbus, Indiana, 1971

Republic Newspaper Office

Chicago, 1970

John Hancock Center

New York City, 1967

140 Broadway

Oakland, California, 1966[66]

Oakland Arena

Oakland, California, 1966[66]

Oakland-Alameda County Coliseum

Brussels, Belgium, 1964

Banque Lambert

(formerly the Brunswick Building), Chicago, 1964

Cook County Administration Building

Yale University, New Haven, Connecticut, 1963

Beinecke Rare Book and Manuscript Library

Extension, Buffalo, New York, 1962

Albright-Knox Art Gallery

Colorado Springs, Colorado, 1962

United States Air Force Academy

(Chase Manhattan Bank Building), New York City, 1961

28 Liberty Street

Portland, Oregon, 1960

Veterans Memorial Coliseum

New York City, 1954

Union Carbide Building

(Pepsi-Cola Corporation World Headquarters), New York City, 1960

500 Park Avenue

Chicago, 1958

Inland Steel Building

Bloomfield, Connecticut, 1957

Connecticut General Life Insurance Company

New York City, 1954

Manufacturers Trust Company Building

Chicago, 1954

Naval Station Great Lakes

New York City, 1952

Lever House

New York City, 1951

Manhattan House

New Town Master Plan, Oak Ridge, Tennessee, 1949

Oak Ridge

Cincinnati, Ohio, 1948

Terrace Plaza Hotel

Official website

Review of the 1954 Manufacturer's Hanover Trust Branch Bank in NYC

Skidmore, Owings & Merrill Architecture on Google Maps

Skidmore, Owings & Merrill photographs, circa 1945-1969 Held in the Dept. of Drawings & Archives, Avery Architectural & Fine Arts Library, Columbia University, New York City