Door Tech Garage Door Services expand throughout Maryland. We currently do garage door installations, garage door openers and all types of garage door repairs in the follow areas: Anne Arundel County, Howard County, Northern PG County (Bowie & Upper Marlboro) and Calvert County. If you don’t see your area here or aren’t sure if we provide services in your area, please call us at (410) 721-1200 and we will let you know how we can help you.