The project site is located in the north of Tehran, where in the past entire area was garden. Extensive development of high-rise buildings in recent years has caused the destruction of the gardens one after another. The project site is one of the few remaining gardens in the area. The design strategy is based on the preservation of garden. Therefore, the boundary lines between the trees and the empty space were considered as the position of the volume. This strategy preserved all the trees in the garden, and the trees create a simultaneous mixture of spatial and volume in the project. In addition, this geometry causes the continuity and fluidity of the spaces and their combination with the garden in the whole project. In order to create a dialogue between the three elements, inhabitants, building and garden with contemporary language, the outer edge of the floors slip on each other, this slip has led to the creation of semi- private terraces and the creation of a hierarchy of spatial, open to closed and public to private for residents. The project was completely covered with wood to strengthen the dialogue between garden and facade.