As always, I strongly recommend buying F. Alton Everest's "Sound Studio Construction on a Budget", which covers all kinds of sound rooms, including domestic listening rooms. Advice from others here is doubtless great too, but you should definitely read Everest and learn a lot of theory as well as getting a lot of practical advice. IMHO.
Dedicated Audio Room Plans....
I will be renting a home for about a year or so while we plan and build a new home. My wife agrees that a separate, dedicated audio room is best for us all. Does anyone know of sources for various plans for such a room that one might review and pick the best elements from before sharing ideas with the architect/builder? Any that show specific materials lists and/or dimensions would be MOST welcomed. Thanks