Hi Everyone! This is definitely the same house, I've attached some of the progress pictures to help out with the visualisation. My Architect, the house has multiple kitchens, bathrooms and bedrooms as it incorporates a Granny flat & it is designed for multiple generations to live in as Wuff mentioned. There is 4 generations 5 adults & 2 kids living at the home!

We used Sip walls, "Stuctual Insulated Panels. Also have foam cladding. Storm resistant Fire resistant Termite resistant Foam is a wonderful insulation, I'm sure your fine, just ask your builder and all you worries will disappear.

I watched your videos and that sound is awful! I think that the clue is in that it doesn't happen in the tiled areas. Tiled floors in first floor construction is usually laid over a fibre cement sheet (called tile underlay) that is nailed to the particleboard sheet with lots of nails. This provides extra rigidity and to minimise any movement to avoid the grout between tiles opening up, or tiles cracking. Each dot on the tile underlay sheets in this photo shows where a nail should be - so your bathroom floor is rigid and strong, and won't creak. It sounds to me like there is inadequate fixing of your particleboard sheets in your carpeted areas to the floor structure. Perhaps the easiest fix would be to lift the carpet, apply wood screws through to the floor structure, and re-lay the carpet. Wood screws provide a better fix than nails, but your builder probably just used nails. Just be sure that the new screws align with the floor joists below, and you are not going through electrical wires or plumbing! It is possible that when the particleboard sheets were nailed down that the person missed getting the nails aligned with the joists. It shouldn't be this bad, but you may never get any satisfaction from the builder or VBA, so I would just spend the money to do it right. This isn't fair, but that noise is so bad, and I know I couldn't live with it. Best of luck, Dr Retro of Dr Retro House Calls and Dr Retro Virtual Visits.

Not sure how well we can advise with limited details. Photos plans? What options have you discarded. Start with a tint film on windows, then maybe a roof on deck.