The thermal performance of ground source heat pump systems (GSHP) strongly depends on ground temperature and energy demand for heating and cooling over the year. Indeed, the amount of energy lost or retained inside a building are influenced by thermal quality of building envelop (TQBE). Over time, the building design is changing to meet the increased comfort requirements. This results in changing energy demand for heating and cooling. The overall aim of current work is study the impact of climatic changes in combination with TQBE on driving energy and construction cost of GSHP. This was achieved by comparing the driving energy of the GSHP as well the required total length of the borehole heat exchanger for different GW scenarios and different TQBE. Under climate conditions of central Europe, study shows that it is not always good to built our building with high TQBE.