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© 2019
International Interior Design Association

Chicago, IL
Toll Free: 888 799 4432
International: +01 312 467 1950

IIDA Index


IIDA Index

The IIDA Index, developed with Designer Pages, is a one-of-a kind indicator of economic health for the commercial design industry. Using project data from diverse design firms across the U.S., and focused on commercial interior projects, the Index is designed to enable firms to assess their position compared to the overall industry, recognize new business strategies, and identify market opportunities.

The Index features the IIDA Index Report, available for purchase, and a user-friendly online interface exclusive to participating firms.

Read the Introduction to the IIDA Index to find out more. 

“Until now, we have only had access to generalized reporting for the construction industry at large, but not specific to our core sector of commercial interior design. The availability of empirical data that’s directly representative of our marketplace will help inform future business decisions.” - Sascha Wagner, FIIDA, AIA, President and CEO, Huntsman Architectural Group

Project data is represented by a diffusion index that assesses growth using a neutral indicator of 50. A value above 50 indicates expansion; a value below 50 indicates contraction. The Index categorizes projects by region, project size, and market sector.

According to the report, the commercial interior design industry experienced moderate to steady growth in 2017 compared to 2016, with an overall index of 59 in the U.S. Additional key results include:

  • Robust industry growth in the Midwest with an overall indicator of 75, as well as in the East (70)
  • Indications of momentum in education projects in the West (82)
  • Encouraging segment growth in hospitality projects (67) in the Midwest
  • Steady workplace project growth in the South (65)


Participate in the IIDA Index

Download and review the Introduction to the IIDA Index and share it with your firm leadership.

The submission period for the 2019 Index is currently open. Firms interested in maintaining their subscription or becoming a participant can learn more at

For more information, contact