I've seen this question asked before but the responses seem to morph more into cabinets installed (feet, shims, etc).
In my case, I am finishing my basement and would like to do a built-in bookcase. The floor is concrete over vapor barrier and I have not had any moisture or water in 5 years since first building the house. My thought is to protect the built-in with a sheet of treated ply directly to the concrete and then build up from there.
Thoughts? Feedback? Has anyone done this, or have a better mouse trap?
Thanks!