I have a problem with a house I placed in the worldspace Tamriel. It won't show up in the game whenever I use fast travel to go there. Collision isn't there either, I can walk through where the house should be. It's a general problem, not only for the house model I used.

I found out a couple of things about the problem:
- It only seems to affect static objects with a size over 1024. This value can be found in one of the columns in the object window. I'm not sure what it means but apparently it's not possible to change it.
- The problem occurs after using fast travel when the cell isn't loaded yet.
- It can be made visible by quicksaving and reloading but that doesn't fix it permanently.
- Only the objects I place disappear, although I can't find a setting that makes them different from the ones already in the game.

The model I use is "SBitsandPieces", a shop house in Solitude. I placed it from the objects window, I didn't copy it from Solitude. There are no scripts on it and no other effects I know that could make it disappear. It seems to be a loading problem.

Is there any solution to make it permanently visible?

I have the same problem

It's a known bug. Keep checking the http://www.gamesas.com/topic/1347249-unofficial-creation-kit-bug-list-2/.

Had the same problem using the big round tower from Markath - I tried from scratch twice, but in both cases I could see the door I'd added, but not the tower. I'm wondering if certain one-use-only statics have a hidden use property?

Check the Full LOD button. It causes lag in slower computers but until fixed there is no other way around it.