Despite their traditional looks, these houses embody innovative ideas. Conceived by Ballast Nedam, iQ houses are factory built in concrete, and are delivered complete with stairs, kitchen, pipes, wiring, sanitary ware etc. Each house consists of 6 prefabricated modules plus a roof in various styles. The floor plan and facade layout are highly flexible and the house can be divided into apartments. Once a concrete foundation is laid on site, up to 4 iQ houses can placed per day. All that remains is to apply an exterior finish. The owners can add extensions even years later.