Call Us! (240) 660-2911 MHIC #25738  |  VA Class A #048696A

Providing Commercial Roofing Services to MD, VA & Metro DC for over 27 Years

About Us


A family owned and operated company, Interstate Corporation has been proudly serving the Washington, D.C. Metropolitan area for the past 27 years. Interstate Corporation is a full-service Commercial Roofing company led by Perry Cho, president and John Cho co-founder. Together both brothers continue the legacy of success from one goal that was set 27 years ago, “Delivering Quality Service that Exceeds Expectation.” Over those years, Interstate has crafted an impressive portfolio of commercial, governmental, and private projects with an emphasis on educational buildings. Our portfolio includes hundreds of replacement, renovation and new construction of K-12 schools, universities, academic buildings, shopping centers, apartments, warehouses, offices, churches, and an array of other commercial and governmental facilities.


Interstate Corporation and its employees aim to provide quality services that fully expose the true value to the Owners. In an effort to better the surrounding communities of the Washington, D.C. Metropolitan area, Interstate Corporation pledges a professional, diligent work staff that provides safe, innovative services. Our extensive experience, commitment to quality, and value of tradition are evident in each and every project we proudly complete.


Over 36,000 square feet of our main office and warehouse building in Gaithersburg, MD, we are fully equipped with most state of art computerized sheet metal fabrication equipments. Our inventory includes a variety of specialty and most commonly used roofing and sheet metal supplies to facilitate the immediate demands that are often required from job site. Interstate also owns and operates various highly demanded special roofing equipment such as, Asphalt Tankers, Crane Trucks, Telescopic Forklifts, Man-Lifts, Tractors etc.


Minority Certifications:

  • MDOT Certified by State of MD
  • SWaM Certified by State of VA
  • MBE Certified by PG County, MD

Pre-Qualified Contractor by the following school districts:

  • Montgomery County Public Schools
  • Fairfax County Public Schools
  • Howard County Public School System
  • Anne Arundel  County Public Schools
  • Washington County Public Schools

Our Facility & Equipment

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View our Project Portfolio

Read Client Testimonials

"Exceeding our clients expectations by delivering quality service in a timely and professional manner, is our goal"
— Perry Cho, President