One of the Top Interior Designers on Long Island

A Design-Build Interior Designer on Long Island Serving the Greater New York Area and Florida
At Keith Mazzei Interiors we believe that every project begins with a vision, and we like to enhance that vision with a craft we’ve been nurturing for years. Our specialized craft as interior designers and decorators is to deliver complete interior design projects, from the moment of sketching, through construction, to the last finishing touch. We’ve worked as interior designers on Long Island NY and in Florida. Our priority is for our customers to remain inspired throughout the whole process of making their dream home a reality. Let’s start making yours!
A Long Island Design-Build Interior Designer Serving the Greater New York Area and Florida
At Keith Mazzei Interiors we believe that every project begins with a vision, and we like to enhance that vision with a craft we’ve been nurturing for years. Our specialized craft as interior designers and decorators is to deliver complete interior design projects, from the moment of sketching, through construction, to the last finishing touch. We’ve worked as interior designers on Long Island NY, and in Florida. Our priority is for our customers to remain inspired throughout the whole process of making their dream home a reality. Let’s start making yours!



Keith Mazzei: An All-Around Interior Designer on Long Island
Keith Mazzei is the founder and leader of Keith Mazzei Interiors, a distinctive Long Island interior design firm with offices in Florida as well. His eye for creative design began at a very early age and formally advanced when graduating from the Metropolitan Institute of Interior Design in New York. His love for ground-up construction is what differentiates him from the crowd. He has over two decades of experience, not just specializing in modern and traditional interior design styles, but also in carefully learning every personal, lifestyle and structural detail required by his clients. His strength: delivering a timely and stunning project as the first person in, and the last one out.
Keith is a versatile designer and handles projects from Manhattan to Montauk and Miami to West Palm Beach. He takes pride in being in tune with the latest credentials, currently holding memberships to the American Society of Interior Designers, the IDS, and is a founding member of the Designers and Builders Alliance of Long Island.


Keith Mazzei
CEO, Keith Mazzei Interiors
Our Extensive Portfolio of Work
Keith Mazzei is an interior designer in New York that handles interior design projects from Manhattan to Montauk and Miami to West Palm Beach. Check out our portfolio to see our examples of our expertise.








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