renovation Projects

Solebury Two-Plex

Solebury Two-Plex

Project Type Services A hundred-year-old derelict duplex provided the setting for a set of two new housing units.  It is called a "two-plex" because each unit is distinctly different.Site Challenges The existing foundations of the original duplex were on a site...

Urban Trifecta

Urban Trifecta

Project Type Services Studio Hillier identified an opportunity to transform a warehouse/garage, on Witherspoon Street in downtown Princeton, into a storefront architectural studio. The studio is flanked on either side by a residential-turned-commercial property which...

Virginia Capitol Building

Virginia Capitol Building

Project Type Services Hillier and other teams were selected to complete the renovation and underground expansion of the Capitol. This building, designed by Thomas Jefferson, still serves as the center of Legislative activities for the Commonwealth.Thoughtful Historic...

Studio Hillier LLC is an interdisciplinary design firm in Princeton New Jersey, co-founded in 2011 by Partners Barbara A. Hillier, AIA and J. Robert Hillier, FAIA, PP.


Together for more than thirty years, we form the backbone of a vibrant, growing, full service design studio that has the depth of experience and design talent to take on any challenge.


Studio Hillier is located in the heart of the historic Witherspoon-Jackson neighborhood in Princeton, New Jersey and operates out of a converted machine shop and warehouse.

Our Proven Design Process



The process begins with spending time with our team where together we assemble inspiration images, conduct lifestyle interviews, define the premise of the project, and ultimately, discover a path to completion.



Our team will explore residential design solutions using 2D sketching, 3D modeling, and BIM technologies to develop a thoughtful and suitable scheme.



We collaborate with a group of engineers specialized in residential architecture to develop the construction documents necessary for permitting and construction. We make sure all the details and coordination proceed in a timely manner, and maintain the architectural and design integrity of the project.



We are partnering with the best construction experts in the area. We help you to choose a professional contractor and ensure a good working relationship.


Building permits

We are able to efficiently navigate the complex permitting process to get the project off the ground.