Mancini Mui Architecture Construction

Mancini Mui provides a full range of architectural services, including project conceptualization, architectural design and documentation, and construction management. Since its inception in 2003, Mancini Mui has completed hundreds of projects across the region, including residential, commercial, and institutional works of various sizes.


Mancini Mui is a firm that combines decades of experience in construction with superior architectural talent, delivering high-quality results from project conception to closeout.

“We’re not just architects. We are professionals committed to guiding your project from start to finish.”


American Institute of Architects (AIA), member – Leadership in Energy and Environmental Design (LEED), accredited – Smithtown Chamber of Commerce, board member, former President – Smithtown United Civic Association, founding member



With over thirty years of experience in architecture, planning, and construction, Mark Mancini knows what makes a building work. Mark began his architecture career in Long Island in 1993. For the next decade, he travelled across the world and the United States, overseeing a wide range of projects and developing his design expertise. In 2003, Mark founded Mancini Architecture in Smithtown, where he lives with his wife and two children.

Mark’s core philosophy is simple: the purpose of architecture is to improve both the built environment and the lives of the people in it. Mancini Mui Architecture is committed to this philosophy—delivering beautiful, responsible design that enriches the surrounding community.

Mark served as the President of the Smithtown Chamber of Commerce, and currently sits on the board of the Smithtown United Civic Association.

Mark holds an Associate’s Degree in Architecture and Construction Tech from Alfred State College and a Bachelor of Science in Architecture from the New York Institute of Technology. He is licensed in New York State and Massachusetts.