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Mary Petschel
"Early on in my education, I was instilled with a desire to make a profound impact on the world. I found a way to do that with design; a career in interior design allows me to be a part of creating better environments for people to live and work within. IIDA is an important part of that path; membership connects me to a global network, provides leadership and advocacy opportunities, advances my professional development, and much more!"

IIDA is the commercial interior design association with global reach. We support design professionals, industry affiliates, educators, students, firms, and their clients through our network of 15,000+ members across 58 countries. We advocate for advancement in education, design excellence, legislation, leadership, accreditation, and community outreach to increase the value and understanding of interior design as a profession that enhances business value and positively impacts the health and well-being of people’s lives every day.

Mission Statement

IIDA provides meaningful resources to commercial interior designers and their clients to advance the profession and enhance business value.

Vision Statement

Our vision is to support culture, enhance business value, solve problems, and positively impact the health and well-being of people’s lives through a greater understanding of interior design.



IIDA, and all of its affiliated Chapters and subsidiary components, is committed to the sustained, intentional, and organized dismantling of racism in all of its forms and instance


Be Included: Join the IIDA community today! It is more important than ever to be part of an engaged and supportive, equitable, and accessible community—to belong and to be included.

As an IIDA member, you are included in an expansive design community with the power to connect and provide a platform for coming together, being heard, and taking action, wherever you are in the world.

Questions related to Membership can contact our VP of Members

IIDA provides members with the sources to attain expertise, knowledge and contacts. Chapters and City Centers are the visible strength of our Association, and their networking events allow professionals to connect on more personal levels that encourage trust, collaboration, and innovation. Use your contacts as leverage in seeking out opportunities and solidifying partnerships. The people you interact with form a microcosm of the Design World. Begin your Membership journey today.

Connect with St. Louis area Interior Design Community by joining the IIDA Gateway Chapter today!

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