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Public-images-osm logo.svg house = terrace
Terrace (5526211578).jpg
Used in addition to building=house on the outline of a linear row of residential dwellings, each of which normally has its own entrance, which form a terrace ("row-house" or "townhouse" in North American English). Edit this description in the wiki page. Edit this description in the data item.
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)
Useful combination
See also
Status: in use

This tag can be used in addition to building=house to map the outline of a row of houses which form a [W] terrace. Each of the dwellings normally has its own entrance. These are known as "rowhouse" or "townhouse" in North American English.

Use of this tagging scheme is discouraged, mapping the individual units in a terrace is preferred.

Terraced vs Terrace

Although both house=terraced and house=terrace are currently used to describe the individual houses/units in a building=terrace, this is generally considered incorrect in British English.

Instead, individual units in a terrace should be mapped with house=terraced. The use of house=terrace (this page) should only be used for mapping the terrace as one building.

Alternate tagging

Mapping a row of terraced houses (which have not been mapped as adjoining individual units) as building=terrace is much more common. This approach is preferred by some mappers, since a row of terraced houses is not, by definition, a house. This is also the current default approach to tagging a row of terraced houses in the iD editor.

There are many ways of mapping terraces, these can be seen of the wiki page Tag:building=terrace.

How to map

Draw a single area area along the outline of the whole terrace. Optionally add entrance=* for each entrance. If the borders of each unit in the terrace is known, then it is preferred to instead map the individual units separately and tag them with house=terraced.

Possible Tagging Mistakes

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!