<p>The invention relates to a foundation arrangement for a structure or building in which one or more pillars (4) of the structure or building is supported on piles (2) set in the ground, and the foundation arrangement comprises a pile group comprising two or more piles (2) for supporting the pillar (4), the piles (2) being arranged in the horizontal direction around the pillar (4). The foundation ar rangement also comprises a one-piece mounting base (6) supported on the piles (2) of the pile group and made of steel, to which the pillar (4) is supported and fastened with fastening means (8) in such a manner that the load of the pillar (4) is transmitted in the mounting base (6) essentially as compression or pulling forces to the piles (2) of the pile group.</p>
