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About Simpson

Our History


Simpson Unlimited, Inc. was founded in July 1992 by owner Gregory Simpson. After a decade of providing quality workmanship, an impeccable safety record, top-notch management and supervisory personnel, Simpson built a “blanket” operation with an excellent reputation and since, has amassed a loyal customer base. The goals set for the company involved the establishment of a building services firm that specializes in all areas of commercial building exterior restoration, focusing on roofing, total exterior waterproofing, masonry, caulking, and specialty coatings.

Simpson Unlimited soon grew into a company offering a wide variety of trade expertise including: roofing, total exterior waterproofing, masonry, caulking, and specialty coatings, and architectural sheet metal.

Today, Simpson Unlimited is a complete building envelope services company employing a staff of over 120 committed employees with decades of experience, we are the go-to exterior building solutions company for the Washington, D.C. Metropolitan area. With our work force and management capabilities, the company takes on projects ranging from a simple repair to multi million dollar contracts with professional confidence. When a client places its trust in Simpson Unlimited, they know that they are going to receive a quality product delivered in a timely manner.

Simpson Unlimited, Inc. has developed strong and resilient business relationships through technical estimating, practical project management, and scalable service solutions for today’s commercial property managers and building owners. We are replacement and maintenance contractors for the entire building envelope who are uniquely capable of providing turnkey commercial exterior restoration.

We seek continued growth through the development and education of our staff, investment in cutting edge equipment, development of industry leading techniques, to produce high quality roofing and restoration projects. At Simpson Unlimited, we believe that by choosing our services, you are opting for excellence.

Our Mission is

  • to earn the respect of a community by providing excellence of craft & personalized customer relations;
  • to accelerate corporate growth by expanding our strengths & diminishing weaknesses;
  • to recognize & reward a dedicated workforce of professionals whose best efforts are the foundation of this company; and
  • ultimately, to realize business success based solely on a code of unparalleled morals and ethics .



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