Lauren Thomsen Design is a Philadelphia-based architectural design firm specializing in craft-driven renovations and high-performance new construction. Rooted in technical expertise, material integrity and a modern ethos, the firm creates spaces that are both timeless and highly functional. Founded and led by Lauren Thomsen, AIA, NCARB, LEED AP, the firm balances innovation with a deep respect for sustainability, historic preservation and urban redevelopment. For her, architecture is more than aesthetics — it’s about creating spaces that meaningfully shape daily life. Every project begins with an understanding of its site, light and spatial potential, leading to designs that feel effortless yet deeply intentional. With a hands-on, technical approach and a commitment to collaboration, the firm not only envisions what’s possible but also navigates the complexities of construction to bring each project to life with precision and care. See how Lauren makes architecture timeless and intentional in today’s Designer Friday.
Andrew Joseph: How do you approach a new design project?
Lauren Thomsen: I begin each project by listening and observing. I do my best to understand all of the diverse parameters that need to be accounted for in the solution.
AJ: How do you stay creative and inspired?
LT: I travel. I see architecture and design as a language — as a fundamental form of cultural expression. I love seeing and learning about other cultures — their history, their cities, different nuances and patterns and ways of life. I am actually writing this from a desk in Copenhagen.
AJ: How do you balance functionality and aesthetics in your designs?
LT: I see architecture as a language, as one form of cultural expression. To me, it’s art that is governed by scientific and practical parameters.
AJ: What is your favorite type of space to design?
LT: Houses. I think a lot about how the idea of “home” is more than a spatial concept — it is an idea that is pretty sacred (at least to me). I like thinking about and discovering what the idea of “home” means to each client and how I can best help manifest that. I enjoy the challenge of creating unique or unexpected solutions that clients are looking for, but can not arrive at themselves. The most fulfilling part of my job is seeing clients happy, settled and comfortably enjoying their homes once a project is completed.
AJ: What is your favorite design era and why?
LT: Midcentury modern. It is such an identifiable style that really feels like a manifestation of the zeitgeist of the time. I love looking at the different permutations of MCM styles from different cities and countries. Italian versus Danish versus American are all different.
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