OSM data matches UrbIS data pretty well here… but UrbIS data does not seem to match reality. :-/

This building is located between the footpaths and the balcony. → It doesn’t exist. → I removed it. (More precisely tagged is as not:* to alert anyone who would want to recreate it by importing UrbIS data.)

The chimney should be an extension of the existing house but is not found in UrbIS. → No action for the moment.  (You may want to draw it if you like; in that case, add a note to the building to mention that we diverge from official data.)