You have a few options...from most expensive to least expensive:
1) Properly designed/built floor/ceiling construction that includes "decoupling" and "floating" subfloor systems that are properly insulated...that reduces the amount of sound transfer (should almost triple your budget for joist/subfloor build = substantial investment)
2) Acoustic 5/8" drywall mounted on ceilings (should triple your ceiling budget)
3) Stuff the cavities between the joists (in the ceilings) with acoustic batting (like Roxul Safe N Sound)...should double your ceiling/insulation budget
4) Use cork sandwiched between 2 layers of plywood (12mm cork glued in place and then plywood glued over top; and then a second thinner layer of plywood screwed down over top). This will double your subfloor material costs. It allows ANY flooring type to be installed over top because the cork is sandwiched between plywood. Even vinyl planks can be used.
5) Use 12mm cork underlay underneath the RIGID flooring you want to work with (laminate, hardwood, engineered hardwood, cork floating flooring, ceramic/porcelain tile). This will double you "under pad" costs...but in the end it will be the cheapest solution of all.
Be aware that vinyl products do not allow much "under pad" so vinyl planked/tiled floors will not accept option #5.
Do the acoustic upgrade NOW....a retro fit will double the cost of building new. That means a $5K acoustic ceiling upgrade during a NEW BUILD becomes a $10K ceiling upgrade at a later date. Same for subfloors, same for acoustic batting in the joists, same for cork underlay sandwiched between plywood, same for adding cork underlay to a floor that is already installed.
I would go and talk to a build firm that ADVERTISES acoustic building materials. Get them in as consultants. Pay their fees. Regular GCs may not have run into acoustic requirements and they may be going at it "blind"...because they don't understand the principles....therefore they can ruin the high end materials you have purchased...therefore ruining your "upgrades". Acoustic professionals are as important as the materials you purchase. Understanding comes through education. Not all GCs/Architects have the education in acoustics.
And above all...don't skimp on costs. That's the wrong way to go with acoustic builds.
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