Index: trunk/data/validator/unnecessary.mapcss
===================================================================
--- trunk/data/validator/unnecessary.mapcss	(revision 14897)
+++ trunk/data/validator/unnecessary.mapcss	(revision 14901)
@@ -33,4 +33,17 @@
   group: tr("unnecessary tag");
   fixRemove: "{2.key}";
+}
+
+/* #17482 */
+*[building:ruian:type=2][building=farm_auxiliary],
+*[building:ruian:type=7][building=house],
+*[building:ruian:type=11][building=hotel],
+*[building:ruian:type=12][building=warehouse],
+*[building:ruian:type=13][building=barn],
+*[building:ruian:type=18][building=garage],
+*[building:ruian:type=21][building=greenhouse] {
+  throwWarning: tr("{0} is unnecessary for {1}", "{0.tag}", "{1.tag}");
+  group: tr("unnecessary tag");
+  fixRemove: "{0.key}";
 }