Greg Johnston






P 469.259.4196

Greg is an accomplished preservation architect with over 29 years of experience in various projects, including civic, education, religious, library, theater, hospitality, multifamily, institutional, health care, commercial, office, industrial, museums, parks, and residential. That diversity of project experience brings valuable insights from lessons learned and challenges overcome.

He has excellent project management skills, including client communications, cost estimating, contracts, specifications, and construction documentation, in addition to his design acumen.

Starting with the award-winning Ambassador Hotel rehabilitation in Tulsa, Oklahoma, he worked on many historic and existing buildings early in his career. Greg has the perspective and knowledge necessary to lead complex and demanding historic preservation projects. His professional portfolio includes notable historic projects on the Texas A&M University campus, projects for the Texas Historical Commission, and iconic Dallas structures such as the Dallas County Administration Building (the Texas School Book Depository Building) and the Dallas County Old Red Courthouse. He serves as the Advising Architect for Lewisville’s Old Town Design Review Committee.

When Greg isn’t at the office working on projects, he dedicates his time to the preservation industry and his community. Greg is currently Treasurer and Board Member of Preservation Dallas. He is a long-term member of the Landmark Commission’s Swiss Avenue Historic District Task Force and more recently South Boulevard Park Row Task Force.

Greg Johnston in the foreground reviewing architectural drawings with three other people.

Get to know Greg

What did you want to be when you grew up?

When I was nine years old, I told my family I would go to the University of Arkansas and become an architect.

What are a few items on your bucket list?

Visiting Greece, Israel, Lake Powell, which I have already done. One day I hope to visit Egypt, Turkey, Australia, New Zealand, and other destinations including natural and man-made wonders.

What is your advice to young professionals in your field?

Don’t be afraid to accept a challenge. Also, don’t be afraid to ask how to help with that challenge.

Notable projects

Dallas County “Old Red” Courthouse Rehabilitation

Dallas, TX

Photo of the Dallas County Administration Building with a tree and monument in the foreground.

Dallas County Administration Building Condition Assessment

Dallas, TX

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