about us


trio design | mission statement

Our team of licensed architects and design professionals provide customized design services,
creation of construction documents, and construction administration thru project completion. We excel at client focused service from project inception to completion. Our process and attention to each curated client experience, starts with creative design expertise, provides a knowledgeable team that implements code and safety requirements into thoughtful design
solutions, assists with the permitting processes, and navigates through the inevitable ‘bumps’ during the construction process.
Utah architect firm Trio Design owner Brittany Johnson

Brittany White Johnson

Principal Architect



Brittany formed Trio Design as a woman owned business in 2014. The firm’s roots began with the years of experience of Robert L. Marshall Architect & Assoc., which then combined with a drive...

Robert L. Marshall

Architect & Landscape Architect



Harmony of form and space is a continuous passion of mine. Form can be a structure, house, tree, and/or an inorganic object. Space is the expanse, or counter point, which surrounds, which is in between, and which stages forms....

Troy Anderson, landscape architect at Utah firm Trio Design

Troy Anderson

Landscape Architect


I believe that Landscape Architecture is the design of outdoor and public spaces to achieve environmental and behavioral outcomes with an aesthetic flair.  My approach involves addressing the client’s needs while also systematically investigating the existing social and ecological...

Annette Sommer, Office manager and Administrative Assistant at Trio Design, a Utah architecture firm

Annette Sommer

Office Manager | Admin. Assistant


I joined the Trio Design team over 11 years ago with 20 years of experience in bookkeeping, maintaining daily office operations, personnel management and more. Here at Trio Design I get to contribute my skills and talents in many facets. Along with my duties of maintaining...