At the initial design phase of an apartment project in İstanbul, Nilüfer Kozikoğlu (TUŞPA Architecture) has offered me a job I haven’t done in Grasshopper before. This definition includes a sketch of a possible apartment renewal, analyzing and optimizing data from the contractor’s and property owners’ perspective. It also checks if the proposed solution is appropriate according to the building regulations for that area. In Turkish, KAKS means the maximum total floor area / land area, and TAKS means building base area / land area. All data input are parametric, so this solver can be implemented in most of the situations (except that the shape of the land area is not rectangular). Also Nilüfer asked for an addition that declares the different floor types, lofts with two storeys and green gardens that also have to be calculated.