Steinfeld says the power of design and architecture lies in its potential to create something meaningful to people. But, traditional practice often neglects many issues of importance to those who use buildings and community infrastructure. "Early on in my career I learned that, compared to traditional practice, I could have a greater impact by doing research that changed fundamental practices in architecture." His research focuses on empowering all citizens with enabling, healthy and sociable environments. 

A prolific and nationally award-winning scholar, Steinfeld has an extensive record of sponsored research, including funding from  National Institute on Disability Independent Living and Rehabilitation Research (NIDRR), the National Endowment for the Arts and the U.S. Department of Housing and Urban Development. The IDeA Center is one of the oldest and most successful research centers at UB with over 30 years of continuous funding. It is a model for interdisciplinary work. Not only is the center home to two center of excellence grants but also provides unique services to the WNY community and the design professions. The center’s scope of work now extends beyond architecture to community planning, product design and service design.

Steinfeld has over 100 publications and three patents. Many of his publications are considered key references in the fields of accessible and universal design; he was four books, Inclusive Housing: A Pattern Book (W.W. Norton), Universal Design: Creating Inclusive Environments (Wiley), Accessible Public Transportation (Routledge) and Inclusive Design: Implementation and Evaluation (Routledge). He is internationally known for his research and has traveled widely to lecture in many countries.

His current work includes development of a certification system for universal design (isUD^TM), design of automated vehicles, development of inclusive wayfinding systems for buildings and expert witness testimony on accessibility and falls in buildings. 

Steinfeld is a frequent consultant to federal and state agencies, building owners, and attorneys. He has been a licensed architect in New York since 1978 and designed several constructed buildings, including interiors for retail, office and religious buildings, two multifamily housing projects, a group home, a vacation home and home renovations and additions.