As a rule, an increase in the number of storeys of the building requires the need to equip additional objects of vertical communications and technical devices, which, in turn, slightly (by about 5-10%) reduces the useful area of each floor. For convenience on each floor, it is advisable to have a separate bathroom, hall, utility room. With an increase in the number of storeys, it may be necessary to install the elevator. As for the material side of the issue, the cost of the house when adding floors increases significantly: additional construction of ceilings, laying of pipes, water units and energy supply, ventilation are required. Of great importance is the comfortable temperature in the room, so it is necessary to build a boiler room, and the rates for the installation of the boiler room choose the optimal. The requirements for the foundation are also tightened, since the load per unit area of the soil increases. However, an increase in the number of storeys can be called an environmentally friendly solution. As you know, the surface of the Earth has its own radioactive background, on the lower floors of the building, radioactive radiation is of maximum value. Therefore, it is not recommended to be located on the ground floor of the bedrooms and children’s rooms. In addition, on the upper floors it is always more comfortable and dry, of course, if the building is provided with a reliable roof.