CTA’s Historic Preservation Services (HPS) has focused our preservation expertise on historic buildings throughout the United States, from Maryland to California.

Our in-depth knowledge of materials and systems; building behavior and pathologies; historic materials, their use, and their degradation; and how weather and other outside sources impact character-defining features provides a substantial background for planning and implementing preservation plans.
Much of our work occurs in concert with CTA’s other disciplines, as all systems impact historic buildings. CTA’s HPS works closely with our firm’s envelope specialists, structural and civil engineers, electrical and mechanical engineers, and interiors group to create unique solutions specific to each property’s needs.
Within HPS, our services range from the initial planning stages to the completion of construction administration services. Our National Register eligibility analyses of historic buildings of the modern age demonstrate our understanding of the broadening of the field and scope of preservation. Our HABS/HAER documentations and building assessments help generate a basis from which to develop the preservation road maps that are the key components of historic structure reports.
We are skilled at concentrating on the key components required to render a building usable, while retaining its significant historic character-defining features. Our understanding of how historic buildings are detailed provides for design and incorporation of unobtrusive details that can lengthen the life of the property.
We fully analyze the character-defining features of existing buildings, with the intent of maintaining and celebrating them. This understanding extends to a sensitive approach when designing alterations or additions, so they respect the original building.
CTA’s HPS has continued to progress technically, incorporating testing and computer modeling into the planning stages of our projects. Our baseline mantra of doing no harm to buildings has benefited greatly from our analyses of moisture migration through building constructions, enabling us to increase insulation values without causing harm to the existing structures.
Our healthy working relationships with the National Park Service, State Historic Preservation Officers, and industry leaders throughout the states strengthens our knowledge base, our ability to receive project approval by the reviewing authorities, and the success of our preservation solutions.