Talk:Ice Castle/@comment-213.57.34.117-20130101183300/@comment-4995735-20130101193631

All 4 lower buildings must be built, not under construction, but completed. Then you must have the 4 resources listed at the bottom of the screen all collected. If there is an additional $ cost (I don't think there is for Ice Castle) you must also have that. Once all of those are complete, then you can build it.

~radmand2