CoStudio is a collaboration-based architectural studio.  Our clients are commercial building owners, developers, businesses, and home owners.  Our mission is to provide our clients with architectural solutions tailored to their needs and designs that enable our clients to reach their goals. 


Philip Proefrock has worked on projects ranging from libraries to parking garages, as well as a variety of residential work for both single-family and multi-family projects. He has been at the forefront of green building and sustainable design, and was part of the team responsible for the first commercial vegetated roof installed in the State of Michigan for the Ann Arbor District library's Malletts Creek Branch. His previous experience includes nearly a decade with Luckenbach|Ziegelman Architects where he became a key contributor on the firm's green building projects. He continues to have a deep interest in sustainable design.

Philip has been an architecture instructor at Lawrence Technological University where he taught the sustainability studio. He has also been active with the USGBC Detroit Regional Chapter and has served as an educational facilitator for several groups of professionals seeking to earn their own accreditation. His consulting on sustainability topics has ranged from authoring continuing education articles for LEED professionals to serving as a peer reviewer on Green Building Systems for the U.S. Environmental Protection Agency.

Philip is a writer on a range of topics. He is the senior contributing writer for EcoGeek.org where he concentrates on green technology, renewable power, architecture and transportation. His articles also appear on Jetson Green, Inhabitat.com, GreenovationTV, Green Building Elements, Green Options, and My Green Palette.

Education & Training
  • Master of Architecture, Miami University, Oxford OH
  • Master of Fine Arts, Cranbrook Academy of Art, Bloomfield Hills MI
  • Bachelor of Fine Arts, Bowling Green State University, Bowling Green OH
  • Professional Licenses & Affiliations
    • State of Michigan Architect License #1301056659
    • NCARB Certificate #68449
    • LEED Accredited Professional (GBCI Number: 10080841)
    • Member, American Institute of Architects


CoStudio is a full-service firm that can assist you with all phases of development and building improvement projects:

  • Existing building / Site Evaluations & Master Plan
  • Design (Concept, Schematic & Design Development)
  • Construction, Bidding & Permit documents
  • Construction contract administration
  • Facilities Needs Assessment & Master Plan
  • Facilities Renovation & New Construction
  • Site & Building Selection / Feasibility
  • Building Green & Sustainability Consulting
  • Graphic Presentation Materials
  • Interior Design / Space Planning
  • Accessibility & Code Compliance Consulting
Our process always begins with you - we listen to your needs, wants, inspirations and challenges... all the things that will drive your project as we move forward.  Then we put on both analytic and creative hats and create design solutions for you to choose from.  Our designs combine aesthetics with functionality and respond to project budget and sustainability goals and we bring in industry partners to suit your project.


There's lots of interesting stuff out there in the world. Here are some things we like, and that we'd like to share.

99 Percent Invisible

Awesome podcast about design. We're a supporter.

Cornellbox Tumblr

Phil's own Tumblr of intriguing and compelling images (from other people).

99 Percent Invisible

Awesome podcast about design. We're a supporter.