I've added a 2nd layer to qa.poole.ch that highlights building outlines for buildings that have neither addr:housenumber or addr:housename tagged and don't have a node with such tags inside or on the outline.
Minor buildings (hut, garage, garages, rood, terrace, greenhouse and shed) are currently rendered in orange, however I may suppress them completely in the future.
The check for a node in or on the building outline is computationally rather expensive leading to the layer not being as fast as the noname one. Zoom 0-12 are regularly re-rendered in batch mode.
Naturally in some areas it is common to not have building specific address information, we are currently missing tagging to suppress such false positives. I'm planning on adding support for addr:interpolation and some further addr tags that are not so common. If you have any susgestions please leave a comment.
Added support for addr:conscriptionnumber, addr:full and addr:interpolation. Note that this currently makes the layer substantially slower at lower zoom levels.