Most of the time the solutions provided are not produced in the region where the disaster 
occurred.As a consequence, much 
discussion has been centered on the question whether temporary housing is really needed, due to 
longer reconstruction processes, or rather an overspending that represents an important 
consumption of resources that are crucial for permanent reconstruction (Steinberg, 2007).Besides the costs associated to the units, there are the 
expenses with the whole infrastructures needed to make temporary settlements functional 
(roads, water, sewerage, electricity, etc.).According to UNDRO (1982), a temporary house unit can 
cost more than a permanent one and some authors refer that it may be three times more 
expensive (Hadafi & Fallahi, 2010).