Tag:building:levels=0
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 building:levels = 0
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| Description |
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A building or building part with no levels above ground. Should have building:levels:underground with corresponding values. To indicate a feature is on the first above ground floor of a building, use level=0. 
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| Group: buildings |
| Used on these elements |
    |
| Useful combination |
| See also |
| Status: de facto |
| Tools for this tag |
The tag building:levels=0 indicates that a building or building part has no levels above ground. The feature should have building:levels:underground=* with corresponding values.
Most features appear to use this differently (April 2026: only 3.5% have also the key "building:levels:underground").
Possible tagging errors
To indicate a feature is on the first above ground floor of a building, use tag level=0.
[out:json][timeout:500];
(
nwr["building:levels"="0"][!"building:levels:underground"]
({{bbox}});
);
out geom;