Yes, I recognize that I am fortunate enough to even consider doing this. In our house, we have a small room that we don't really use, other than it becoming the general "LEGO and other stuff goes in this room..." Over the years, I made some very basic wooden shelves for three of the walls, but it's great at all. It's not that I lack skill, so much as I lack vision for the space. :)
The room is 10'x9' (or just over 300cm x 2007mm, or 3m x 2.7m). There are two windows that are one of the shorter walls, and a very small closet on the other shorter wall.
Our collection is largely LEGO Modular budlings, but it also includes a nice cache of Classic Space, early Castle, and some Friends sets.
I would love to see examples of what people have done to dedicate a smaller space to both displaying completed LEGO sets and MOCS, as well as having space to actually build - ideally enough space for more than one person to build at a time. Thanks!