Founded in 1997, Mainstream Construction Group is a full-service, construction management company. It offers small box construction options for restaurants, coffee shops, retail offices, corporate prototypes, fuel stations and convenience stores. The company serves Dollar General, Crispers and Dunkin Brands. Mainstream Construction Group also serves owners, investors and developers. The company provides budgeting, estimating and value engineering services. It offers in-house permitting and design options. The company provides design, building, general contracting and interior tenant build out services. Mainstream Construction Group is located in Altamonte Springs, Fla.