Hi There! I am going to go on and say that I am NOT a DIY' by any means But Before I call someone out I would like to get opinions from people who are! =)
Ok heres my problem... Our living room has high ceilings. It is almost impossible to keep the home warm in the winter and cool in the summer (peak months of course) We have had someone come out and do all of the things to try and fix this problem. (ac unit upgrade,ducts cleaned,windows sealed ect ect.) Also its just a lot of unused space. When we first bought the home it was a WOW factor but now that we have lived in it for a few years, not so much anymore.. I have thought maybe to lower the celings.. Add another room above then just extend the ducts. (again im not entirely sure you can even do these things!) Here are a few pictures.
In the second picture you can see a ledge that already has a solid floor. i have no idea why? but the back wall is the wall of the spare bedroom.