Building a house

In the design phase and planning on a dedicated listening room. Any advice on its construction, lessons learned?
About the only thing I would do is make sure you have plenty of outlets. Things change over time so installing anything in the wall limits future choices.
Thanks, plan to have a bunch with dedicated outlets for the mono amps. Of course will be doing professional sound treatment after the room is built. Have used vicoustics in my current room. Any other suggestions?
+1 to Russ' comment.

Separate electrical circuits. Ethernet of course. Look into "Rockwool" or similar sound insulation techniques and see if that is of interest.