Revamp Your Interior Design

Interior Design Firm You Can Trust

Hello, my name is Joyce Mathis. I am a passionate interior designer and the proud owner of MJM Design Company. I’d like to welcome you to my website! As a well-established interior design firm in St. Louis, MO, MJM Design Company delivers a full line of design services to residential and commercial customers, from remodels and redesigns to whole homes and single rooms. My work has been featured in publications and many homes around the area.

Living Room / Music Room

Make Me Your Preferred Interior Designer

Your property says a lot about you. This is why I make sure that your unique personality is properly reflected on the interior design of your space. I’ll work with you and, if appropriate, your builders, to ensure that each element of your home or business is consistent in finish and function. If you’re searching for a designer to create a cohesive interior look that speaks to your tastes and styles, there’s no better interior design firm to call.

Schedule an Interior Design Consultation Today!

Want to revamp the look of your property? Make the most of my interior design services, and allow me to turn your ideas into reality. Whether you want to remodel your kitchen, bedroom, or living room, you can count on me to help you. Schedule a consultation today! Send me a short message including your name, contact information, and your hopes for your project. I look forward to working with you!


"Love my transformation!"

Jean S.

"I had the privilege of working with MJM Design Company in remodeling my kitchen and family room. Joyce Mathis was so easy to work with, and she and her crew made the experience a very pleasant one. I love my new space! She was able to take my ideas and tweak them into my perfect kitchen and family room. Joyce was very patient with me when it came to making the decisions to create this amazing space! I highly recommend working with her. It will be a very enjoyable and satisfying experience."