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Public-images-osm logo.svg building = demountable
Portable classroom building at Rock Creek Elementary School - Washington County, Oregon.jpg
A demountable, prefabricated building
Group: buildings
Used on these elements
may be used on nodesshould not be used on waysmay be used on areas (and multipolygon relations)should not be used on relations (except multipolygon relations)
Status: in use

information sign

This rarely used tag is disputed (not a building type, it is a property). Consider using a building type building=* and the property building:prefabricated=*

Use building=demountable for a  demountable building, also called a prefabricated building or prefab. These types of building are constructed off-site, then transported to the site by truck. They generally have no foundation. Demountables are not limited to school classrooms, they are also used on construction sites and at large events/festivals.

See also