The existing building is not being modified. Only part of the wall is demolished in order to deliver the extension. All solutions in the annex are solved by connecting to existing systems in the existing building. Constructions. The foundation is polar. Metal columns and metal trusses are designed. The designed roof is a profiled deck. Exterior walls, facades. Facade finishing with multilayer metal panels (hereinafter referred to as “panels”). 1000mm high panels are used. Profiling of the external surface of the panels – like an existing building. Roofs. The roof is overlapped, the coating is rolled. The building has an energy efficiency class of A +. Dimensions of the building in the plan 36.53 x 18.40 m.