Decorating the cellar

[PeachyIceCream]

Is it possible to put flooring or Wallpaper in the cellar?
I'm trying to turn it into a library but I'm unable to change the flooring or wallpaper. Am i missing something, or is it just not possible?

 

[EliteDangerGamer]

I don't think you can, but why turn it into the lib, just use a renovation room, those get huge

 

[Antsy]

I find the attic makes a nice cozy library.