Overhead Door Company of Concord™ Concord, New Hampshire Overhead Door Company of Concord™ is one of the largest installers of garage doors and electric operators in New Hampshire. They first began in 1948, when Don Johnson began the Overhead Door Company of Burlington™, Vermont and Concord, New Hampshire out of his home. Now, this garage door company is in its third generation of ownership and the Johnson family maintains its commitment to excellence in customer service. Their experienced staff and team of technicians and installers are some of the best in the industry and are ready to assist you with all of your door system needs. Whether you are a homeowner needing garage door repair, service or installation or a business owner needing service or installation of a commercial door system, Overhead Door Company of Concord™ is the garage door company to call.