DD Headshot 1_102114.jpg

Dennis Duffy, IIDA, LEED AP BD+C

National Council for Interior Design Qualification Certificate # 28687 

Dennis Duffy is the Principal of Duffy Design Group, Inc.  He began his design career in the Miami Design District, while taking a break from his intended path to medical school and having completed an undergraduate curriculum in Chemistry.  Finding the world of interior design intriguing, Dennis moved to New York City, and enrolled in a certificate program at Parsons School of Design.  “Being trained in science my entire life, but also having a family background of artists, interior design, for me, was the marriage of both!”  He worked in a small residential firm during the next couple of years, while in school and in 1989, he opened his own design studio. He focused on both residential and commercial projects, both in New York and San Juan, PR.  In 1996 he transitioned to Boston and joined the interior design studio of Repertoire, before striking back out on his own in 1999, as Duffy Design Group, Inc.  He has passed his NCIDQ (National Council of Interior Design Qualification) certification, as well as accreditation as a LEED Professional.  He has served on the board of directors for the New England Chapter of IIDA (International Interior Design Association) and as well as the Director of Education for the chapter. 


Duffy Design Group 

Duffy Design Group is a full service interior design firm, known for its unique and thoughtful designs.  The firm offers its expertise and specific vision to residential and commercial clients, consistently partnering with architects, developers and builders.  Duffy Design Group designs intuitively, carefully determining the best solution for each client based on the functional and aesthetic goals and the relevant architecture. “Attention to detail and follow through in execution is the result of experience and a hands-on attitude by our staff.  To insure that our designs are executed as intended, we work closely with the general contractor and subcontractors, workrooms and cabinetry shops.  We walk the project through from inception to the last accessory placement.”

The Design Process

Phase One:  Design Study & Preliminary Design Concept 

Duffy Design Group consults with you to determine the scope of your project, any particular concepts you wish to achieve and any and all functional requirements for the areas to be designed.  This analysis allows us to come up with a program for your needs, which we shall present to you for approval before proceeding.  Utilizing this program, we’ll begin to work out the design concepts.  We’ll prepare a visual presentation, in loose format, including floor plans, color schemes, sketches and preliminary selections.  

Phase Two:  Design Development

Based on your feedback of this presentation, we begin to modify and develop the concept. We shall prepare plans, elevations, color/finish/fabric/material formats and furniture selections in greater detail.  We refine other sketches, drawing or materials to communicate specific design solutions.  We shall also prepare budget estimates for the work to be done.

Phase Three:  Final Design and Project Planning

Once you have approved our development of the design concept and we have determined an overall budget we will complete finalized plans, schedules, furniture, lighting, finish and fabric selections and all other specifications necessary to implement the project.  Should working drawings be required for interior construction and/or millwork we will provide them as part of this phase.  At this time, we will also submit more extensive budgets for your approval.

Purchasing, Supervision and Installation Services:

Duffy Design Group provides purchasing services for our clients. We will process all necessary purchase orders with our vendors and sources of supply.  We track all order acknowledgments, approve cuttings and samples, maintain contact with our manufacturers to speed your orders along, oversee all work in our custom workrooms, and coordinate trucking, shipping and receiving.  We supervise delivery and installation of all items ordered through us.


Duffy Design Group Awards

2015 Gold PRISM Award for Best Interior Merchandising of a Model - Rental Community Presented by the Builders and Remodelers Association of Greater Boston (BRAGB)

2015 Best of Houzz Service Award

2014 Best of Houzz Service Award

2013 Best of Houzz Design Award 

2013 International Interior Design Association (IIDA) New England Chapter Design - Distinguished Merit Award 

2011 Award of Excellence for Contributions to the Interior Design Profession by the American Society of Interior Designers (ASID)

2010 Silver Award for Best Interior Design of a Custom Home Presented by Dream Homes Awards

2009 International Interior Design Association (IIDA) New England Chapter Design Award for Best Retail Project - D SCALE

2009 AIA/HUD Secretary’s Creating Community Connection Award for Project Place Gatehouse

2008 Boston Magazine’s Best of Boston for Interiors/General Excellence

2006 Boston Magazine’s Best of Boston for Interior Design

2003 Boston Magazine’s Best of Boston for Interior Design

2002 Boston Magazine’s Best of Boston for Interior Design

2002 The Improper Bostonian Magazine’s Best of Boston Award

2002 VOX /Out Emerging Voices of Style and Design

Duffy Design Group Awards.jpg