Definition: Semi-permanent housing unit
Population censuses - UNECE
A semi-permanent housing unit is an independent structure such as a hut or a cabin which has been constructed with locally available crude materials such as wooden planks, sun-dried bricks, straw or any similar vegetable materials for the purpose of habitation by one private household and which is used as the usual residence of at least one person at the time of the census. Such units may be expected to last for only a limited time, although occasionally they may last for longer periods.
United Nations Economic Commission for Europe (UN-ECE) (in cooperation with Eurostat), "Conference of European Statisticians Recommendations for the 2010 Censuses of Population and Housing", New York and Geneva, 2006