This feature has been labeled as deprecated
. The recommended replacement is: height=*
The reason is documented in Deprecated features
. You are still free to continue to use or interpret this tag as you see fit since OpenStreetMap does not have “banned features”.
Under no circumstances should you (semi-)automatically change “deprecated” tags to something else in the database on a large scale without conforming to the automated edits code of conduct
. Any such change will be reverted.
The key building:height=* is deprecated but still found often to describe the height of a building.
To tag the total height of a building please use height=* instead.