Abstract: It is of essence to solve, in short time and with the minimum effort, the problem of settlements of shallow foundations of the existing buildings/structures caused by the adjacent foundation excavation. A patent-pending methodology for reduce building settlements caused by foundation excavation is illustrated along with a case study. The PU grouting is adopted to minimize the negative impact on a historic building caused by foundation excavation, which is just 1.3 m away from the building. The PU grouting is conducted during different stages of construction, including the construction of diaphragm wall, the first and second layer bracing. The settlements of the neighboring building is minimized and controlled by the PU grouting.