Who We Are

We’re Katharine and Sue, friends who have worked together for 9 years. Bonded by a love for creation, color and elegant design early on, we first met while both students at the New England School of Art and Design at Suffolk University. Today, we are fortunate to spend our days meeting with and servicing discerning clients around the Greater Boston area, specifically in Concord, Newton, Wellesley, Weston, Brookline, Lincoln, and Sudbury.

We guarantee beautiful and functional home interiors that are impeccably tasteful, personal and everlasting. We’re not just interior designers – we’re professionally trained space planners and interior architects as well. Visit our portfolio to see beautiful images of our work, and to hear from clients themselves on what it’s like to work with Mast & Falls. We can make your home feel brand new!


Katharine Mast

I am fortunate to do what I love with someone I truly enjoy working with. I am committed to making client’s dreams come true by designing beautiful home spaces that they will deeply enjoy. My favorite part of designing for clients is their awe when they see a vision come to life. Changing a space can make a profound impact on a home and a family by creating more room, bringing new energy into a household and so much more. Beyond designing, I have a passion for competitive show jumping on my two beautiful horses. I am the proud mother of two incredible young women and there are few things better than spending time with them and my husband. In my spare time, I enjoy exploring new places, reading, cooking, painting, and spending time with friends and family.


Sue Falls

I have long been fascinated by anything to do with design and art – interiors, architecture, fabrics, fashion, and music. Taking a vision and turning it into a reality for people is thrilling. I am inspired by all the clients who have allowed me to help make their dreams come true. I am also lucky to have the best partner – it’s wonderful to work with a lifelong friend like Katharine. Aside from art and design, my passions include family time, traveling, going to the beach, reading historical fiction and studying art and architecture. The architecture and design of the Medieval and Renaissance periods often inform our designs, even when working on contemporary spaces. I am also privileged to raise two amazing children with my wonderful husband.

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