In the "Phase III: Design project" section, the details relating to the systems are finalised.

In the "Foundations and structure" section, you must select the type of ground from the nine options available. You must also specify how the foundations will be constructed, choosing from options such as strip footings, piles or slabs, amongst others.

In the "Construction systems" section, you should begin by specifying the quality level of the proposed solutions. Next, you need to select the type of façade cladding; the program offers eight different options for this. Another key element is the external joinery, which is a determining factor in calculating the bill of quantities. In this case, you can choose from materials such as aluminium, aluminium-wood, PVC, timber or steel.

In addition, the type of roof must be selected from the ten available options, which include variants such as a flat accessible roof, a pitched tiled roof or an intensive green roof. Finally, it is also necessary to decide whether the partitions will be prefabricated, dry-built or industrialised, a decision that directly influences the project’s specifications and costs.

Finally, in the "Installations" section, tick the boxes corresponding to the installations you wish to include in the quote. The available options are: "Telecommunications", "Audiovisuals", "Electrical", "Plumbing and drainage", "Air conditioning", "Heating only", "DHW", "Ventilation for wet areas", "Ventilation with heat recovery", "Air source heat pumps", "Geothermal energy", "Fire protection systems", "Security and safety", "Interior lighting", "Gases and derivatives", "Home automation" and "Transport".