Simonsen Architect was started in 2018 to help Clients envision and realize inspiring spaces.  Utilizing years of experience on commercial and residential projects, the firm is focused on client centered service, utilizing  extensive construction knowledge, bringing creativity to the design process and implementing high performance practices to realize comfort, beauty and efficiency to the places we create. 


We invite you to take a look at some of our completed projects and we hope you will keep us in mind when you are ready to launch the design process to realize a space that inspires you every day!

  • LEED Accredited Professional

    • Building Design and Construction

  • NCARB Certification

  • Montana AIA Design Award of Merit

  • Licensed Architect

    • Montana

    • Wyoming

    • Oregon

    • North Dakota

    • Nevada

Eric's Expertise


With over 28 years of experience in the practice of architecture, Eric Simonsen has assisted Owners with a wide range of project types, sizes and levels of complexity.  We seek to provide creative and inspiring design solutions that begin with Owner requirements and dreams for the spaces they will occupy.  Working with us you will have a single point of contact with Eric as the architect and project manager working for you through the entire process of your project. A key effort we employ with owners is to consider cost effective strategies using our years of experience to yield best practice solutions.  This has been a focus for Simonsen since entering the profession. With experience on simple building types to LEED Platinum certified buildings, all building designs can yield efficiencies and healthy comfortable environments that reward building owners and occupants.


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Eric has helped us on three different projects.  He has shown an innate ability to listen, understand, and improve on our ideas.   His timely, professional, insightful, and thorough approach is something that always meets or exceeds our expectations.

Bill & Amy Brown

Billings, MT

© 2018 by Simonsen Architect