Grupo Costanera is a Chilean joint-stock company constituted by foreign investors in 2006. It is currently a leading company in the area of ??public infrastructure in Chile with proven experience in engineering development, construction, administration and exploitation of concession contracts. of public works.rupo Costanera S.A., together with its subsidiaries, engages in the operation and maintenance of urban and interurban roads.It is also involved in the construction, maintenance, and operation of roads.