The following TOP 100 Giants Directory
is based upon information as complied by Interior Design magazine.

Rank

Firm Name
Firm Headquarters and Firm Branches

Fee in millions

Work Installed

Employees

Interior

Design

Total

Firm

$ Value

in Millions

Sq.ft.

Interior Design

Total Firm

1

Gensler
600 California Street, San Francisco, CA 94111
Tel: 415-433-3700

San Francisco
Atlanta, Boston, Chicago, Denver, Detroit, Houston, Irvine, CA;
New York, Parsippany, NJ; Santa Monica, CA;
Washington, Hong Kong, London, Tokyo.

$65.8

$82.3

$950.0

18.0

576

640

2

Hellmuch, Obata & Kassabaum

St. Louis
Atlanta, Chicago, Dallas, Greenville, SC; Houston, Kansas City, MO; Los Angeles, New York, Orlando, FL; Washington, Berlin, Hong Kong, London, Mexico City, Shanghai, Tokyo.

$28.5

$117.0

$450.0

15.0

149

1372

3

HNTB

Kansas City, MO
Alexandria, VA;
Indianapolis, Milwaukee, Phoenix, Seattle

$27.1

$60.8

$48.7

1.5

35

65

4

ISI (Interior Space International)

Los Angeles
Chicago, New York,
Tel Aviv, Israel; Tokyo, Warsaw, Poland

$25.0

$25.0

$600.0

10.0

204

212

5

Leo A Daly - Planning Architecture Engineering Interiors

Omaha, NE
Atlanta, Dallas, Fort Worth, Houston, Los Angeles, Phoenix, San Antonio, St. Louis, Washington, Berlin, Dubai; United Arab Emirates, Hong Kong, Madrid, Spain; Tokyo

$21.0

$65.5

$346.5

8.1

67

641

6

R. J. Pavlik, (The Pavlik Design Team)

Ft. Lauderdale, FL
Buenos Aires, Argentina; Osaka, Japan;
San Paulo, Brazil;   Seoul, Korea; Tokyo

$20.5

$20.5

$353.1

7.6

87

87

7

Sverdrup Facilities

St. Louis
Irvin. CA; Orlando, FL; Washington

$18.5

$284.4

$180.0

6.0

87

4878

8

FRCH Design World (formerly SDI/HTI)

Cincinnati, New York, Singapore

$17.7

$18.2

$193.0

NR

175

198

9

Skidmore, Owings & Merrill

Chicago
Los Angeles, New York, San Francisco, Washington,
Hong Kong, London

$16.3

$74.0

$228.5

5.8

118

742

10

HBA Int'l (dba Hirsch Associates)

Santa Monica, CA
Atlanta, San Francisco, Hong Kong, London, Singapore

$15.7

$16.8

$425.0

NR

NR

179

11

Retail Planning Associates (RPA)

Columbus, OH
Atlanta, London, Mexico City

$15.5

$17.2

$736.0

6.4

113

150

12

RTKL Associates

Baltimore
Dallas, Los Angeles, Washington, Hong Kong, London, Tokyo

$13.8

$55.0

$140.0

3.0

118

500

13

Smith, Hinchman & Grylls Associates

Detroit, Phoenix, Washington

$13.2

$47.0

$198.5

6.6

49

380

14

The Phillips Janson Group Architects

New York, Greenwich, CT

$12.7

$12.7

$234.0

3.9

107

132

15

NBBJ

Seattle
Columbus, OH; Los Angeles, New York, Research Triangle Park, NC;
San Francisco, Washington, Tokyo

$12.6

$70.0

$100.0

6.0

118

511

16

Perkins & Will

Chicago
Atlanta, New York, Berlin

$12.3

$30.8

$414.0

10.1

38

88

17

IA Interior Architects

San Francisco
Chicago, Dallas, Los Angeles, New York, Washington

$12.2

$12.9

$257.0

8.5

111

131

18

HLW International

New York
Los Angeles, Al-Khobar, Saudi Arabia; Brussels, Belgium; Haikou, China; Kuwait City, London, Mexico City,   Riyadh, Saudi Arabia; Shanghai, China; Taipei, Taiwan

$11.9

$24.2

$156.0

3.8

29

230

19

Swanke Hayden Connell Architects

New York, Miami, Washington, London

$11.7

$18.0

NR

3.8

120

150

20

Interprise

Chicago, Dallas, Montreal

$11.7

$12.3

$79.0

6.1

82

96

21

Callison Architecture

Seattle

$10.2

$29.0

$10.2

NR

53

315

22

Walker Group/CNI

New York
St. Louis,   Sun Valley, CA;
Hong Kong, Tokyo

$10.1

$13.4

$200.0

2.6

107

108

23

Griswold, Heckel & Kelly Associates

Chicago
Baltimore, Boston, Deerfield, IL; New York, Washington

$9.8

$10.0

$305.0

5.0

135

150

24

Studios Architecture

San Francisco
Washington, London, Paris, New York

$9.7

$12.9

$173.0

3.5

125

140

25

Wilson & Associates

Dallas
Los Angeles, New York, Johannesburg, South Africa; Singapore

$9.4

$9.6

$200.0

NR

81

102

26

Carole Korn Interiors

Boca Raton, FL
Dania, FL; Fisher Island, FL; Naples, FL

$9.2

$9.2

$60.0

NR

25

46

27

Mancini-Duffy

New York
Parsippany, NJ; Tokyo

$8.9

$9.0

$275.0

4.0

93

95

28

Environetics Group

New York
Los Angeles, London, Mexico City, Sydney, Australia

$8.8

$9.8

$165.0

2.8

80

97

29

SCR Design Organization

New York
Atlanta, Boston, Columbus, OH; Dallas, Denver, Fairfax, VA; Miami, Philadelphia, San Jose, CA; St. Paul, MN; Westlake Village,   CA; Washington, London, Mexico City

$8.5

8.5

$160.0

3.5

61

71

30

Heery International

Atlanta
San Francisco, Seattle, Washington

$8.2

$87.0

$9.3

2.4

36

759

31

Einhorn Yaffee Prescott, Architecture and Engineering

Albany, NY
Washington, White Plains, NY

$8.0

$26.6

$100.0

1.0

36

326

32

Al/Boggs

Washington,   Richmond, VA

$7.9

$9.0

$160.0

3.5

83

105

33

Vocon Interiors

Cleveland

$7.8

$13.0

$56.1

3.6

36

37

34

RMW Architecture + Design

San Francisco
Sacramento, CA; San Jose, CA; Santa Rosa, CA

$7.8

$8.4

$95.0

2.4

75

85

35

VOA Associates

Orlando, FL
Washington, San Paulo, Brazil

$7.5

$14.2

$52.3

1.5

52

120

36

Graham - Kim Design

Woburn, MA
Dubai, United Arab Emirates; Istanbul, Turkey; London,
Seoul, Korea; Tokyo

$7.4

$7.4

NR

0.6

29

36

37

Cole Martinez Curtis and Associates

Marina Del Rey, CA

$6.6

$6.6

$190.0

3.3

51

55

38

Henningson, Durham & Richardson

Omaha, NE
Alexandria, VA; Dallas

$6.5

$36.3

$197.9

1.0

21

351

39

Pierce Goodwin Alexander & Linville

Houston
Alexandria, VA; Dallas, Tampa, FL

$6.4

$25.5

$75.0

1.2

63

177

40

Ellerbe Becket

Minneapolis
Kansas City, MO; New York, Washington

$5.7

$63.5

$139.7

3.0

34

690

41

Daroff Design

Philadelphia

$5.7

$6.0

$240.0

3.0

46

50

42

DES Architects + Engineers

Redwood City, CA

$5.7

$8.5

$200.0

NR

14

77

43

Schafer Associates

Oakbrook Terrace, IL; Mexico City

$5.7

$6.7

$100.5

4.0

41

53

44

Burt Hill Rittelmann Associates

Pittsburg, Butler, PA; Philadelphia, Washington

$5.7

$17.3

$90.0

1.7

30

198

45

Jung/Brannen Associates

Boston, Hartford, CT; New York

$5.6

$7.9

$48.8

2.0

14

71

46

Elkus/Manfredi Architects

Boston

$5.3

$8.2

$99.1

1.3

90

90

47

The Environments Group

Chicago

$5.3

$5.3

$100.0

2.5

74

84

48

HKS

Dallas, Los Angeles

$5.3

$35.0

$96.8

3.3

28

260

49

Gwathmey Siegel & Associates Architects

New York
Bedford, NY; East Hampton, NY

$5.3

$10.5

$70.0

0.8

29

68

50

Flad & Associates

Madison,WI
Gainesville, FL; San Francisco, Stamford, CT

$5.2

$17.4

$109.8

0.3

99

181

51

JGA - Jon Greenberg & Associates

Southfield, MI

$5.0

$6.1

NR

1.2

54

78

52

Descon Interiors

New York

$5.0

$5.0

NR

1.0

29

35

53

Granary Associates (formerly KPA Design Group)

Philadelphia

$4.9

$13.9

$87.5

2.1

45

126

54

Fitzpatrick Design Group

New York

$4.8

$4.8

$80.0

1.6

31

34

55

Hansen Lind Meyer

Charlotte, NC
Chicago, Iowa City, VA; Orlando, FL; Philadelphia

$4.8

$26.5

NR

NR

48

310

56

Page Southerland Page

Austin, TX
Dallas, Houston, Washington

$4.7

$13.9

$3.6

2.7

47

179

57

Interior Space

St. Louis

$4.7

$4.7

NR

1.6

40

52

58

Ewing Cole Cherry Brott

Philadelphia, Haddonfield, NJ; Washington

$4.6

$21.0

$72.0

2.6

16

220

59

O'Donnell Wicklund Pigozzi & Peterson Architects

Deerfield, IL; Chicago

$4.6

$13.1

$32.0

4.6

27

190

60

Ted Moudis Associates

New York

$4.6

$4.6

$75.0

1.7

32

39

61

The Switzer Group

New York

$4.5

$4.5

$85.0

1.6

37

50

62

3D/International

Houston, Fairfax, VA; San Antonio

$4.5

$29.8

$73.9

1.5

48

289

63

Associates in Architecture & Design

Scottsdale,   AZ; London

$4.3

$4.8

$80.0

2.0

51

59

64

Greenwell Goetz Architects

Washington

$4.3

$4.3

$30.0

0.9

30

36

65

The H. Chambers Company

Baltimore, Atlanta; Easton, MD; Nassau, Bahamas

$4.3

$5.3

$35.0

1.5

27

46

66

CBT/Childs Bertman Tseckares

Boston

$4.2

$6.0

$50.0

2.0

20

76

67

Rice Brydone Limited

Toronto

$4.2

$4.2

$43.0

1.2

37

45

68

Bergmeyer Associates

Boston

$4.2

$5.2

$46.5

0.9

55

65

69

JPC

Redmond, WA

$4.1

$4.3

$75.0

2.5

37

40

70

Barry Design Associates

Los Angeles, Rome, Tokyo

$4.0

$4.0

$50.0

NR

28

28

71

Staffelbach Design & Associates

Dallas

$4.0

$4.0

$102.0

1.2

39

48

72

Butler Rogers Baskett Architects

New York

$3.9

$5.3

$52.3

0.8

40

50

73

Design 1 Interiors

Marina Del Rey, CA; Hong Kong, Paris

$3.9

$3.9

$65.0

1.7

49

55

74

ADD

Cambridge, MA

$3.9

$5.0

$18.0

1.1

31

53

75

Design Forum

Dayton, OH; Branson, MO; Los Angeles

$3.5

$6.0

$121.2

1.6

54

68

76

The Mathes Group

New Orleans, Houston

$3.5

$6.0

$48.0

1.4

45

72

77

DBI Architects

Washington, Falls Church, VA

$3.5

$3.5

$48.0

2.4

36

36

78

Associated Space Design

Atlanta, Tampa, FL; Vienna, VA

$3.4

$3.9

NR

4.0

45

53

79

Gresham, Smith and Partners

Nashville, TN
Atlanta, Birmingham, AL; Ft. Lauderdale, FL; Jackson, MS;
Jacksonville, FL; Louisville, KY; Richmond, VA

$3.3

$25.7

$75.0

1.5

36

429

80

Ballinger

Philadelphia

$3.3

$8.3

$50.0

1.3

30

35

81

Silvester Taturo Design

South Norwalk, CT

$3.3

$3.3

$50.0

1.0

37

41

82

LSH/Hague - Richards Associates

Chicago

$3.2

$9.8

$30.0

1.0

20

88

83

Davis, Carter, Scott

Washington, McLean, VA

$3.2

$6.4

$23.4

1.3

29

52

84

Texeira

Los Angeles
Hong Kong, Kuala Lumpur, Malaysia; Manila, Philippines

$3.1

$3.1

$65.0

NR

16

17

85

Eaton Design Group

 McLean, VA

$3.1

$3.1

$33.2

1.0

26

30

86

Settles Associates

Arlington,VA

$3.1

$3.1

$24.9

1.0

29

36

87

Peter Marino + Assoc. Architects

New York
East Hampton, NY; Philadelphia

$3.1

$46.9

$25.0

0.1

52

65

88

Gruzen Salmon Architects, Planners & Interior Designers

New York, Alexandria, VA

$3.0

$8.5

$94.0

0.8

63

65

89

Spillis Candela & Partners

Coral Gables, FL
New York, Orlando, FL; Washington

$3.0

$21.2

$34.6

4.5

32

37

90

Bilkey Llinas Design Associates

West Palm Beach, FL

$2.9

$3.7

$30.0

0.3

40

47

91

Naomi Leff & Associates

New York

$2.9

$3.9

$22.0

0.3

21

30

92

Brennan Beer Gorman Monk/Interiors

New York, Washington, Hong Kong

$2.9

$2.9

$26.0

0.8

34

34

93

Cornoyer-Hedrick

Phoenix

$2.8

$7.2

$55.0

1.8

38

117

94

Ziegler Cooper Architects

Houston

$2.8

$3.9

$96.0

3.8

34

48

95

Harley Ellington Design

Southfield, MI
Denver, Los Angeles, Maitland, FL; Mountlake Terrace, WA;
Windsor, Ontario, Canada

$2.7

$16.1

$52.0

1.8

7

180

96

CPG Architects & Planners

Stamford, CT

$2.7

$2.7

$75.0

2.2

34

34

97

Interni Design

Long Beach, CA

$2.7

$2.7

$60.0

1.5

24

27

98

Benson Hlavaty Paret Roessner Architects

Dallas, Austin, TX

$2.6

$2.8

$31.3

1.8

29

32

99

Robert Fymat & Associates

New York, Paris

$2.6

$2.6

$38.0

3.1

20

22

100

Shea Architects

Minneapolis

$2.5

$3.2

$29.0

1.0

12

60

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