Okay, these are the thoughts I had when reading the permit names:
*SS23: The whole idea of a Greek Mythology house is very interesting to me. I love Greek myths and legends; I used to almost be obsessed with them. So, I think it would be very neat to see these old myths in a terrifying fashion.
Also, my guess is that (with this being a scrapbook year) this house would be related to the Storyteller.
*Sprung1: As a few people have mentioned, this could probably be anything. The first thing that comes to my mind is either Horror in Wax or the Museum of Horrors.
*Sprung2: The Observation Deck could relate to several things. It could have something to do with Frightanic, but there were a few other things that came to mind. An observation deck could have something to do with a watch tower at a prison or asylum. So it could possible be related to Hellgate or PsychoScarepy.
*Parade Building: I pretty much agree with everyone that this going to be the reunion house. That being said, I also had a thought that it could be a redux of the Dungeon of Terror, but that I doubt that would be it.
Anyway, that's just my two cents.