Designing with you in mind

Interior Design

Tamsin Design Group is an award-winning interior design firm based in St. Louis, Missouri. We create both beautiful and functional spaces for our clients, from custom interior design and remodeling construction, to space planning and specifications for residential interior design projects. We bring 20 years of experience and knowledge to guide you through the design process and help you realize your vision. Our passion for design is reflected in the warm and inviting spaces we create for our clients. We believe in excellent customer service and strive to ensure that our clients are happy and satisfied from beginning to end. Let us help you achieve your dreams!

Tamsin Mascetti

Owner/Interior Designer

has a BS in Interior Design and almost 20 years of design expertise and knowledge. Her firm specializes in Residential and commercial interior design. Tamsin is an award-winning designer in Chicago and the St. Louis area and has had several projects published. She loves what she does and it is obvious to anyone who works with her!