Designing with you in mind

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