About Us.

Welcome to Principal Design Company. We are a trusted Interior Design and Custom Fabrication Studio, based in the heart of Salt Lake City, Utah. Founded by husband-and-wife team Hannah and Irving Olague, our company combines a shared passion for design, craftsmanship, and innovation. What began as a dream in high school has grown into a thriving business, reflecting individual expertise and a collaborative vision.

Hannah leads the design side of our studio, specializing in creating timeless, inviting spaces that are uniquely tailored to each client. Irving, with 15 years of experience, heads our CAD and fabrication team, where he creates bespoke architectural elements and striking metalwork. From custom railings to intricate design features, his work is known for its precision and artistry.

We can’t wait to collaborate with you on your next project.