2011
The ENR California Top Design Firms list, ranks the largest U.S.-based designs firms, both publicly and privately held, based on design-specific revenue.

Top Design Firms list:
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| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corporation | 199.89 |
| 2 | Jacobs | 122.53 |
| 3 | Gensler | 99.15 |
| 4 | HMC Architects | 85.85 |
| 5 | SmithGroup | 64.73 |
| 6 | Arup | 64.22 |
| 7 | HGA Architects and Engineers | 48.05 |
| 8 | TMAD TAYLOR & GAINES | 44.68 |
| 9 | LPA, Inc. | 43.10 |
| 10 | HDR | 40.17 |
| 11 | ZGF Architects LLP | 34.00 |
| 12 | Cannon Design | 31.47 |
| 13 | HOK | 30.56 |
| 14 | Perkins+Will | 29.62 |
| 15 | Stantec | 27.69 |
| 16 | gkkworks | 25.49 |
| 17 | Perkowitz+Ruth Architects | 25.40 |
| 18 | Degenkolb Engineers | 24.10 |
| 19 | Lee, Burkhart, Liu, Inc. | 23.00 |
| 20 | NTD Architecture | 22.47 |
| 21 | CO Architects | 22.11 |
| 22 | DLR Group WWCOT | 21.02 |
| 23 | Psomas | 19.70 |
| 24 | Simpson Gumpertz & Heger Inc. | 19.41 |
| 25 | RBF Consulting | 19.37 |
| 26 | WRNS Studio | 18.88 |
| 27 | RBB Architects Inc | 18.65 |
| 28 | Mazzetti Nash Lipsey Burch | 18.06 |
| 29 | BKF Engineers | 17.33 |
| 30 | Fentress Architects | 15.32 |
| 31 | Ratcliff | 14.80 |
| 32 | STV | 14.77 |
| 33 | TAYLOR | 14.41 |
| 34 | Harley Ellis Devereaux | 14.24 |
| 35 | Carrier Johnson | 13.14 |
| 36 | exp Global Inc. | 12.18 |
| 37 | Nichols, Melburg & Rossetto Architects | 11.90 |
| 38 | KTGY Group, Inc. | 11.57 |
| 39 | Syska Hennessy Group | 11.24 |
| 40 | Ware Malcomb | 10.98 |
| 41 | Thornton Tomasetti, Inc. | 10.66 |
| 42 | Parsons Brinckerhoff | 9.28 |
| 43 | Boulder Associates, Inc. | 8.10 |
| 44 | Nadel Inc | 8.00 |
| 45 | POLLACK architecture | 7.95 |
| 46 | BAR Architects | 7.89 |
| 47 | SB Architects | 6.54 |
| 48 | MulvannyG2 Architecture | 6.44 |
| 49 | Childs Mascari Warner Architects | 6.41 |
| 50 | Perkins Eastman | 5.61 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corporation | 32.51 |
| 2 | Gensler | 27.63 |
| 3 | LPA, Inc. | 8.95 |
| 4 | Arup | 8.43 |
| 5 | Ware Malcomb | 7.61 |
| 6 | HOK | 5.58 |
| 7 | Wolcott Architecture Interiors | 4.03 |
| 8 | DLR Group WWCOT | 3.77 |
| 9 | Psomas | 3.09 |
| 10 | SmithGroup | 2.57 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | HMC Architects | 41.55 |
| 2 | LPA, Inc. | 26.69 |
| 3 | AECOM Technology Corporation | 26.50 |
| 4 | Jacobs | 22.26 |
| 5 | NTD Architecture | 16.23 |
| 6 | Perkins+Will | 15.95 |
| 7 | Gensler | 15.35 |
| 8 | TMAD TAYLOR & GAINES | 15.24 |
| 9 | ZGF Architects LLP | 13.00 |
| 10 | SmithGroup | 12.43 |
| 11 | gkkworks | 11.98 |
| 12 | DLR Group WWCOT | 11.32 |
| 13 | Harley Ellis Devereaux | 9.68 |
| 14 | Carrier Johnson | 8.65 |
| 15 | HGA Architects and Engineers | 6.99 |
| 16 | Ratcliff | 6.66 |
| 17 | Psomas | 6.31 |
| 18 | HDR | 5.87 |
| 19 | Parsons Brinckerhoff | 5.02 |
| 20 | Arup | 4.50 |
| 21 | Thornton Tomasetti, Inc. | 4.34 |
| 22 | exp Global Inc. | 3.95 |
| 23 | Nichols, Melburg & Rossetto Architects | 3.90 |
| 24 | CO Architects | 3.49 |
| 25 | Cannon Design | 3.33 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | AECOM Technology Corporation | 73.50 |
| 2 | Jacobs | 65.55 |
| 3 | Gensler | 10.13 |
| 4 | Arup | 8.07 |
| 5 | ZGF Architects LLP | 7.00 |
| 6 | Simpson Gumpertz & Heger Inc. | 5.82 |
| 7 | Perkins+Will | 5.69 |
| 8 | gkkworks | 4.33 |
| 9 | CO Architects | 4.33 |
| 10 | Psomas | 3.91 |
| 11 | HDR | 3.67 |
| 12 | LPA, Inc. | 3.53 |
| 13 | TMAD TAYLOR & GAINES | 2.54 |
| 14 | Nichols, Melburg & Rossetto Architects | 2.40 |
| 15 | Carrier Johnson | 2.19 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | SmithGroup | 48.25 |
| 2 | HMC Architects | 41.10 |
| 3 | HGA Architects and Engineers | 40.52 |
| 4 | Jacobs | 29.35 |
| 5 | AECOM Technology Corporation | 29.14 |
| 6 | HDR | 27.42 |
| 7 | Cannon Design | 24.64 |
| 8 | TMAD TAYLOR & GAINES | 20.31 |
| 9 | Degenkolb Engineers | 19.30 |
| 10 | Lee, Burkhart, Liu, Inc. | 18.50 |
| 11 | RBB Architects Inc | 17.90 |
| 12 | HOK | 17.23 |
| 13 | Mazzetti Nash Lipsey Burch | 16.64 |
| 14 | TAYLOR | 14.39 |
| 15 | CO Architects | 12.90 |
| 16 | Arup | 10.28 |
| 17 | ZGF Architects LLP | 10.00 |
| 18 | Stantec | 9.91 |
| 19 | gkkworks | 8.16 |
| 20 | Ratcliff | 8.14 |
| 21 | Boulder Associates, Inc. | 8.10 |
| 22 | NTD Architecture | 6.24 |
| 23 | Perkins Eastman | 5.61 |
| 24 | Perkins+Will | 5.47 |
| 25 | Childs Mascari Warner Architects | 5.19 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | Perkowitz+Ruth Architects | 19.36 |
| 2 | Stantec | 12.20 |
| 3 | Gensler | 10.44 |
| 4 | MulvannyG2 Architecture | 6.44 |
| 5 | Arup | 3.20 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | HDR | 33.09 |
| 2 | Parsons Brinckerhoff | 8.39 |
| 3 | AECOM Technology Corporation | 7.53 |
| 4 | Stantec | 6.34 |
| 5 | Psomas | 3.52 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | HDR | 33.85 |
| 2 | RBF Consulting | 17.00 |
| 3 | AECOM Technology Corporation | 14.08 |
| 4 | CH2M HILL | 11.58 |
| 5 | Psomas | 10.74 |
| 6 | ARCADIS | 7.45 |
| 7 | LEE & RO, Inc. | 5.41 |
| 8 | Stantec | 3.47 |
| 9 | Hatch Mott MacDonald | 1.70 |
| 10 | BKF Engineers | 0.95 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | HNTB | 202.30 |
| 2 | Parsons Brinckerhoff | 146.46 |
| 3 | AECOM Technology Corporation | 145.33 |
| 4 | HDR | 65.24 |
| 5 | CH2M HILL | 51.69 |
| 6 | Jacobs | 50.48 |
| 7 | Hatch Mott MacDonald | 43.87 |
| 8 | T.Y. Lin International | 39.60 |
| 9 | Fentress Architects | 30.57 |
| 10 | HOK | 29.37 |
| 11 | RBF Consulting | 28.09 |
| 12 | Arup | 26.34 |
| 13 | BKF Engineers | 21.84 |
| 14 | STV | 19.20 |
| 15 | David Evans and Associates, Inc. | 17.36 |
| 16 | Psomas | 16.52 |
| 17 | Stantec | 14.27 |
| 18 | Syska Hennessy Group | 6.48 |
| 19 | Thornton Tomasetti, Inc. | 6.27 |
| 20 | Wilson & Company, Inc., Engineers & Architects | 3.74 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | CH2M HILL | 48.19 |
| 2 | AECOM Technology Corporation | 43.28 |
| 3 | HDR | 32.93 |
| 4 | RBF Consulting | 17.57 |
| 5 | Jacobs | 13.18 |
| 6 | Psomas | 12.22 |
| 7 | ARCADIS | 10.19 |
| 8 | Parsons Brinckerhoff | 7.10 |
| 9 | Stantec | 6.15 |
| 10 | LEE & RO, Inc. | 4.99 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | Jacobs | 117.40 |
| 2 | AECOM Technology Corporation | 107.17 |
| 3 | SmithGroup | 62.16 |
| 4 | Gensler | 59.36 |
| 5 | HMC Architects | 58.77 |
| 6 | HOK | 41.77 |
| 7 | Fentress Architects | 37.17 |
| 8 | Cannon Design | 28.32 |
| 9 | ZGF Architects LLP | 26.00 |
| 10 | Perkins+Will | 26.00 |
| 11 | LPA, Inc. | 25.86 |
| 12 | Perkowitz+Ruth Architects | 25.40 |
| 13 | NTD Architecture | 22.47 |
| 14 | HGA Architects and Engineers | 22.41 |
| 15 | CO Architects | 22.11 |
| 16 | Lee, Burkhart, Liu, Inc. | 20.00 |
| 17 | gkkworks | 19.63 |
| 18 | WRNS Studio | 18.88 |
| 19 | RBB Architects Inc | 18.65 |
| 20 | Stantec | 17.18 |
| 21 | DLR Group WWCOT | 16.81 |
| 22 | Ratcliff | 14.80 |
| 23 | HDR | 14.06 |
| 24 | TAYLOR | 13.92 |
| 25 | KTGY Group, Inc. | 13.11 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 26 | Carrier Johnson | 12.60 |
| 27 | Harley Ellis Devereaux | 9.11 |
| 28 | Nichols, Melburg & Rossetto Architects | 8.30 |
| 29 | Nadel Inc | 8.00 |
| 30 | Boulder Associates, Inc. | 6.56 |
| 31 | SB Architects | 6.54 |
| 32 | MulvannyG2 Architecture | 6.44 |
| 33 | Childs Mascari Warner Architects | 6.09 |
| 34 | BAR Architects | 5.60 |
| 35 | Ware Malcomb | 5.24 |
| 36 | Perkins Eastman | 4.21 |
| 37 | Roesling Nakamura Terada Architects, Inc. | 4.19 |
| 38 | Dreyfuss & Blackford Architects | 3.85 |
| 38 | Hornberger + Worstell | 3.85 |
| 40 | STV | 2.74 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | Gensler | 39.91 |
| 2 | HOK | 11.42 |
| 3 | AECOM Technology Corporation | 8.24 |
| 4 | ZGF Architects LLP | 8.00 |
| 5 | POLLACK architecture | 7.95 |
| 6 | Fentress Architects | 6.42 |
| 7 | LPA, Inc. | 5.21 |
| 8 | Ware Malcomb | 4.82 |
| 9 | Wolcott Architecture Interiors | 4.27 |
| 10 | DLR Group WWCOT | 4.20 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | HNTB | 202.30 |
| 2 | AECOM Technology Corporation | 140.15 |
| 3 | CH2M HILL | 108.55 |
| 4 | Jacobs | 68.66 |
| 5 | RBF Consulting | 56.43 |
| 6 | Parsons Brinckerhoff | 55.95 |
| 7 | Hatch Mott MacDonald | 42.04 |
| 8 | BKF Engineers | 40.12 |
| 9 | Psomas | 32.03 |
| 10 | T.Y. Lin International | 22.16 |
| 11 | Arup | 17.34 |
| 12 | David Evans and Associates, Inc. | 15.33 |
| 13 | Penfield & Smith | 10.27 |
| 14 | LEE & RO, Inc. | 7.56 |
| 15 | Stantec | 5.68 |
| 16 | HDR | 5.31 |
| 17 | TMAD TAYLOR & GAINES | 5.08 |
| 18 | Quad Knopf, Inc. | 4.94 |
| 19 | HMC Architects | 3.07 |
| 20 | Wilson & Company, Inc., Engineers & Architects | 2.58 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | CH2M HILL | 87.63 |
| 2 | HDR | 83.37 |
| 3 | Stantec | 60.10 |
| 4 | AECOM Technology Corporation | 49.46 |
| 5 | RBF Consulting | 24.21 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | CH2M HILL | 47.51 |
| 2 | AECOM Technology Corporation | 45.34 |
| 3 | TMAD TAYLOR & GAINES | 33.01 |
| 4 | Arup | 27.56 |
| 5 | Syska Hennessy Group | 23.88 |
| 6 | Mazzetti Nash Lipsey Burch | 18.45 |
| 7 | exp Global Inc. | 14.89 |
| 8 | HMC Architects | 13.72 |
| 9 | HDR | 11.69 |
| 10 | Parsons Brinckerhoff | 8.74 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | HDR | 79.98 |
| 2 | Parsons Brinckerhoff | 43.71 |
| 3 | Degenkolb Engineers | 30.37 |
| 4 | T.Y. Lin International | 17.81 |
| 5 | Thornton Tomasetti, Inc. | 17.22 |
| 6 | Arup | 13.93 |
| 7 | TMAD TAYLOR & GAINES | 12.70 |
| 8 | AECOM Technology Corporation | 12.37 |
| 9 | Simpson Gumpertz & Heger Inc. | 8.77 |
| 10 | HMC Architects | 6.20 |
| Rank | Company/Location |
Regional Revenue ($Mil) |
|---|---|---|
| 1 | Gensler | 54.98 |
| 2 | Fentress Architects | 45.83 |
| 3 | SmithGroup | 38.00 |
| 4 | AECOM Technology Corporation | 37.82 |
| 5 | LPA, Inc. | 35.10 |
| 6 | HGA Architects and Engineers | 26.98 |
| 7 | Cannon Design | 20.72 |
| 8 | Perkins+Will | 19.45 |
| 9 | HMC Architects | 18.56 |
| 10 | HDR | 17.11 |
| 11 | BKF Engineers | 17.00 |
| 12 | gkkworks | 16.82 |
| 13 | Syska Hennessy Group | 12.76 |
| 14 | ZGF Architects LLP | 12.00 |
| 15 | Stantec | 11.21 |
| 16 | Carrier Johnson | 9.57 |
| 17 | Hatch Mott MacDonald | 9.30 |
| 18 | DLR Group WWCOT | 8.41 |
| 19 | Jacobs | 7.47 |
| 20 | CO Architects | 7.01 |
| 21 | Lee, Burkhart, Liu, Inc. | 7.00 |
| 22 | Thornton Tomasetti, Inc. | 6.76 |
| 23 | Harley Ellis Devereaux | 6.69 |
| 24 | Parsons Brinckerhoff | 6.32 |
| 25 | Ratcliff | 5.92 |
| 26 | HNTB | 5.01 |
| 27 | WRNS Studio | 4.82 |
| 28 | Boulder Associates, Inc. | 4.58 |
| 29 | RBF Consulting | 4.50 |
| 30 | Perkowitz+Ruth Architects | 4.38 |
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