Studio MHS is a collaboration of talented and passionate designers who take pride in the quality and purpose of their designs.  We see ourselves as a creative piece of the home builder’s team. 

Fulfilling the builder’s sales and merchandising vision informs every layer of our company.



A native of Canada educated in the U.S., Marni Duncan founded Studio MHS in 1995, a culmination of a design career that grew into a strong affiliation with the national home building industry.  Her resilience, interior architecture background and keen market sensitivity have allowed her to survive and thrive in our industry. 



Southern California native Toni Marchetta Smith has more than 30 years of experience in residential and model home design. Employing her remarkable design palette at
Studio MHS, Toni takes a precise approach to merchandising and brings smart design to all levels of the housing market, from the first-time buyer to a luxury move-up.

Costa Mesa, CA