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About

Meet the Matrix Design Team

WHAT WE’RE KNOWN FOR COZY COASTAL CALM, BORN OF CONTEXT.

We’re known for cozy coastal spaces that bring the outside in, structures that work within and respect the context of their existing environment. We’re also known for custom cabinetry and using unique, sustainable materials you won't find in a big box aislet. Because we like our projects to tell a story — your story.

We also have a reputation for our attention to detail. We don’t see a house as an exterior envelope first and an interior, second. We zoom in and out every single day — looking at form and volume from the outside, then shift inward to see how those spaces feel on a tactile level. We consider how a drain affects a facade, or how a window impacts an interior, or how a sink meets a backsplash. These may seem minor, but when done they're wrong, they distract and cheapen. When done well, they elevate the entire space.

BEAUTY & BACKBONE DESIGNED WITH LONGEVITY IN MIND.

Designing in seismic and hurricane-prone regions from California to the Caribbean, has made resilience second nature. We integrate solar, rainwater collection, shading, and natural ventilation; we think about maintenance from day one and design for longevity without sacrificing grace. The lessons we learn in each region make us better designers in both.

ALWAYS ON THE SAME PAGE INTEGRATED DESIGN FROM THE GROUND UP.

As both architects and interior designers, our projects flow with ease. The same team that chooses the exterior of your home is also thinking about the upholstery on your future favorite chair and the way the sun hits the tree in your backyard and if your kitchen marble plays nicely with the ceiling beams. This level of integration means fewer handoffs, more cohesion, and homes where the structure and the spaces within it speak the same language.

Matrix Design Studio

Principal Designer Nico Wallace

At the helm is principal designer Nico Wallace. Surrounded by design thinkers from an early age, she grew up in the firm, which was founded by her parents Fred Gemmell and Holly Howell in 2001 in San Diego.

Nico once imagined a career in diplomacy — and in many ways, got one.

At Georgetown University she studied science and technology within the Walsch School of Foreign Service, blending fluency in Portuguese, French, Spanish, English, and Italian with the skills of bridging perspectives and building common ground. After a year of navigating the financial crisis of 2008 by teaching scuba in the Caribbean, Nico tilted once more toward human-scale problem solving. Back in San Diego, she found herself drawn to the kinds of challenges the firm faced every day and found her calling at the intersection of budgets, construction, and designed spaces. It was there that her diplomatic instincts clicked into place, applied not this time to geopolitics but to individuals and families wishing to live their lives as meaningfully as possible.

Nico earned her Master of Architecture from Woodbury University in San Diego graduating top of her class. She stays connected to the architectural academic community by serving as adjunct architecture faculty at Woodbury University, NewSchool of Architecture & Design, and the University of San Diego. She leads Matrix Design Studio with the idea that every great project is a collaboration — one that starts with a genuine conversation.

Matrix Design Studio Shell

“A house should feel like a scaffold for the life you want, not a hindrance — a space that invites morning coffee, homework with your kids and easy everyday rituals.”

— Principal Designer Nico Wallace

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Matrix Design Studio
Matrix Design Studio
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