We were there last July and it was covered in scaffolding. I seem to recall someone saying it was a multi-year renovation. But, the grotto was open. Neuschwanstein had some minor renovations going on by the main entrance, but nothing out of the ordinary. I believe Herrn Chiemsee was renovation free.

Too bad, because I thought the Linderhof was the prettiest of the 3. Maybe not as majestic as Neuschwanstein, but my favorite of the three.