Revealing Interior Design’s 2025 Sustainability Giants

Discover how sustainability-driven firms are designing with both people and planet in mind in Interior Design’s 2025 Sustainability Giants report.

*Blank cells indicate no data reported

Interested in learning more about Interior Design’s 2025 Giants of Design? Check out our report for Top 100 Giants and Rising Giants, Hospitality Giants, Sustainability Giants, and Healthcare Giants.

Editor’s Note: Rankings are based on firms’ total fees deriving from sustainable projects. Gensler has the leading dollar amount, and Arcadis NV has the highest percentage of fees.

Methodology

The Interior Design Giants annual business survey comprises the largest firms ranked by interior design fees for the 12-month period ending December 31, 2024. The listings are generated from only those surveyed. To be recognized as a top 100, Rising, Healthcare, Hospitality, or Sustainability Giant, firms must meet the following criteria: Have at least one office location in North America, and generate at least 25% of its interior design fee income in North America. Firms that do not meet the criteria are ranked on our International Giants list. Interior design fees include those attributed to:

1. All aspects of a firm’s in­terior design practice, from strategic planning and programming to design and project management.

2. Fees paid to a firm for work performed by employees and independent contractors who are “full-time staff equivalent.”

Interior design fees do not include revenues paid to a firm and remitted to subcontractors who are not con­sid­ered full-time staff equivalents. For example, certain firms attract work that is subcontracted to a local firm. The originating firm may collect all the fees and re­tain a management or generation fee, paying the remainder to the performing firm. The amounts paid to the latter are not included in fees of the collecting firm when determining its ranking. Ties are broken by rank from last year. Where applicable, all per­cent­ages are based on responding Giants, not their total number. 

All research conducted by ThinkLab, the research division of SANDOW Design Group.