After four years and five months of construction, Seoul City Hall was reborn in October 2012.
The new Seoul City Hall is an eco-friendly building with a unique exterior, the design of which is based on the eaves of traditional Korean houses. The total floor area of the city hall buildings is 90,743m², including the old city hall building, which is now the Seoul Metropolitan Library. Government offices account for 62 percent of the area, and public spaces for citizens make up 38 percent. The building is highly efficient, as it is built with a double skin façade system. About 28.3 percent of the energy used in the building comes from eco-friendly energy sources, including photovoltaic, solar thermal and geothermal.