The application allows customers to communicate with contractors, technicians, finishers, suppliers of materials and equipment owners in the field of construction and finishing of all types of buildings so that the customer can deal with the prices of providers and their information and contact them and search for their address. The application also allows customers to calculate the cost of building a building or office so that the customer can enter the land area and several other areas such as basement, tank, and backyard, the application then calculates the total construction cost and shows the price of each service provider based on pre-stored prices of the meter of each of the service providers. The client can also send a set of files to the application administrator, and after reviewing them, the application administrator will submit the proposed price for the client to execute the project.