what is the first step before construct a building??

Preparation of drawings as per requirements of consumers.br /Estimation of material cost, labor cost & contingencies.br /Approval of drawings & estimates from Client.br /Approval of drawings from City Development Authority. It is most important because residential building drawings should meet the authority defined rules.br /Start of construction work either through contractor or labor hired on daily basis.br /Marking of plot boundaries.br /Cleaning of plot.br /Preparation of site layout as per drawing.br /After the completion of documentation work, the actual construction on plot begins.