SPACE is OBSOLETE is a Philadelphia-based design studio specializing in residential and commercial interiors, architecture, and spatial experiences. Our work is rooted in atmosphere, material sensitivity, and thoughtful restraint — creating bespoke environments that feel both refined and deeply lived in.
The name SPACE is OBSOLETE reflects an ongoing exploration of how we inhabit the physical world within an increasingly digital culture — questioning the evolving relationship between space, perception, ritual, and contemporary life.
JENNIFER HOFER JEFFREY is the Founding Principal of SiO. Formally trained as an architect, her multidisciplinary approach is shaped by professional experience spanning architecture, interiors, photography, and the fine arts. Her work is informed by a sensitivity to atmosphere, visual storytelling, and the emotional experience of space.
Jennifer earned her professional degree in Architecture from The City College of New York and her Master’s degree from Harvard University’s Graduate School of Design. She currently serves as an Adjunct Professor of Practice at Drexel University’s School of Architecture.
Our goal is to create a design experience that feels thoughtful, collaborative, and transparent from the outset. We guide each project with clear communication, well-defined goals, and a streamlined approach tailored to the unique needs of each client and space.
Whether you are undertaking your first renovation or are experienced in the design and construction process, we approach every project as a trusted creative partner — balancing atmosphere, functionality, and long-term vision with careful attention to detail throughout each phase of work.
We typically work on full residential renovations and architectural projects with construction budgets beginning around $250,000.
Design fees vary depending on project scope, scale, complexity, and level of service, and are typically structured as a percentage of the overall construction cost.
We welcome the opportunity to learn more about your project and discuss how we may work together. To schedule an initial consultation, please contact us via email.
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Preserving the patina; a sensitive design intervention.
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An off-grid structure situated in the backyard of a home in Boston. It's sole purpose is to serve as an outdoor bedroom.
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A converted bi-level space situated inside a former Catholic School built in the early 1900's, then later converted into condos.