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Lauren Thomsen Design

Photo: Archetype Photo

Regions Served

  • New York City & Mid-Atlantic

Lauren Thomsen Design is a Philadelphia based architecture and interior design firm. We provide holistic design services for the modern home.

Our approach to design is based on a fundamental belief in the value of space, and its ability to enrich people’s lives. We establish clear project goals, thrive on structure and good communication, and prefer to be involved from design concept through construction and occupancy.

We love not only the outcome, but the process of design, and it is our goal to make sure that our clients do too. We lead design and construction teams to deliver interesting, sustainable, and well coordinated solutions through the use of innovative digital tools and our expertise in materials and building systems.

Most importantly, we recognize that our projects are not simply a built output that is designed, constructed, and then turned over to a client. We see our projects as ecosystems that must serve (and bring joy to!) owners and occupants for their entire life-cycle, and embrace the responsibility to deliver the best possible solutions accordingly.


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  • Lauren Thomsen


  • Rittenhouse Square Studio:
    1508 Lombard Street
    Philadelphia, PA 19146

Featured Projects

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Logan Square Historic Rowhome

This project was the complete renovation of a historic rowhome in the Logan Square neighborhood of Philadelphia. In the rear, a light-filled contemporary addition and kitchen renovation opens to a redesigned garden with living and dining spaces. The design completely transforms the home while still celebrating historic details.

Photos: Archetype Photo
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Bella Vista Renovation

Our client, an interior designer and an old friend, sought to create a loft-style primary suite from an existing family room located on the top level of her rowhome. A bank of operable skylights keeps the space feeling open and bright while a glazed partition provides a layer of privacy.

Photo: Archetype Photo
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Berwyn Addition

The addition of this sunlit room, though small in footprint, transformed the circulation and flow of a suburban home. Windows and skylights provide daylight deep into the building footprint, and opens to a new adjacent exterior patio and pergola space on either side.

Photo: Archetype Photo