|building = gatehouse|
|An entry control point building, spanning over a highway that enters a city or compound.|
|Rendering in OSM Carto|
|Used on these elements|
|Status: in use|
|Tools for this tag|
Typical usage is for gates in city walls or gatehouses for large estates, largely as described in Gatehouse. Many of these are of significant cultural, architectural and historic interest. A secondary usage in some countries is for small modern buildings at the entrances to large commercial, industrial, military or academic (university) sites) housing security personnel who control access to the site, see Guardhouse. At present no additional tag distinguishes between these meanings.
How to map
Draw the building over the highway entering the city or compound. Add two nodes where the way crosses the building (one on the outside and one on the inside 'side' of the gatehouse). Use tunnel=building_passage on the section of highway covered by the building.