Construction materials- new room Qs-Acoustics Forum-Acoustic Fields Forum

Hi all. In getting at a quote for contractor for reno/room build (its both a reno, and extension project for a studio downstairs and living space above)- I’m in a catch 22 of needing to provide design to contractor for quoting materials and labour but also not wanting to make too many decisions that are detrimental. I am in a fairly quiet residential area and dont have major outside sounds leaking in, but want to isolate my inside sounds from getting out. Neighbours on either side (but more than 20 ft away) and park./open space behind. The space here will have no windows or external door directly (good). The building guides etc all point to double drywall/glue/sealing openings, and rubber padding under floors above etc. Is this thinking still appropriate? My existing smaller studio and control room space is ok, (nor great) and suffers from a 7 foot ceiling, and longer rooms that had dual layered rc-channel drywall, covered in cedar panels. Roxsul in ceiling and walls and ceiling covered in guildford fabric. The existing big issues are heating (hot water radiators click and plumbing noises). Windows, and hardwood floor noise above as well as en exterior door that comes right into live area. My new rooms will not have plumbing (will use electric heat), will have no windows or exterior door. I am hoping to isolate and cushion the floor space above from below. The new space is pretty mush wide open in area and access, ie I can build walls etc and ceiling wherever once I get the basement dug out and the extension new foundation added, I am hoping for an 11 ft ceiling (at best). Any advice on this part? The treatment will also then follow once we have a design and plans approved etc. (I am looking to hire Dennis for both consulation phases once I get a rough budget and I get city permit approval of course to proceed). Thx!