What do you mean by major renovation and increase of houses?

Large-scale renovation and addition of houses. Major renovation and addition of houses refers to large-scale renovation and addition of houses. This usually includes the renovation and upgrading of the structure, functions and facilities of the house, as well as the large-scale decoration and decoration of the house. This revision and supplement will involve building structure, water and electricity system, heating and ventilation system, toilet facilities and kitchen facilities. And the overall upgrade of the exterior wall and interior decoration of the house.