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Public-images-osm logo.svg building = construction
Altitude Montreal Under Construction.jpg
A building under construction Show/edit corresponding data item.
Rendering in OSM Carto
Area building=yes.png
Group: lifecycle
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)
Useful combination
See also
Status: de facto

Use building=construction to identify a building that is currently under construction.

The building should have at least the walls of the first floor. If there are only foundations, it should not be marked with this tag.

Combine with construction=* to specify the type of building. For example, building=construction + construction=apartments will become building=apartments when complete.

It is possible to use opening_date=* to mark expected opening date of the building and check_date=* to mark when building was resurveyed to check whatever construction was finished.

See also

Possible synonyms

If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!