The master´s thesis deals with a project documentation of a office building with fitness center in Brno-Bystrc. The object is designed as a detached building with four floors and with one basement. Floor plan of the building is regular, staffed by sloping terrain. In basement is situated underground garage and technical rooms of building. In the first floor is fitness center and garage for a customers. In other floors are office spaces for private company. Above the roof is a engine rooms of ventilation. The structural system is reinforced concrete skeleton, facade is designed as a curtain walling. The object is covered with a flat roof.