A building structure provided with lateral walls comprising a thermoplastic polymer, which comprises: a plurality of vertical walls which are arranged on a plurality of levels, each of which walls comprises at least one first substantially continuous central panel made of a thermoplastic polymer and a pair of layers of cement plaster which are arranged on the opposite sides of the corresponding first central panel and form the opposite faces of the corresponding vertical wall, and a metallic structure for connecting at least the vertical walls of each one of the levels of the building structure.