Upstairs bedroom flooring - Carpet to Wood/Laminate in just one room?

[housie]

If all goes well, we'll be moving into our first owned home in a couple of months.
My DD who's now a teenager has always wanted a wood style floor in her bedroom. At the moment, it's carpeted, and so is the rest of upstairs (except the bathroom which has UFH tiles)
Please could I have some help with these qns?

1. Would using wood/laminate in a bedroom be noisy downstairs? Directly below her bedroom is a study/occasional bedroom.
2. If we have different types of flooring in the same floor, would it be at different heights? I cant imagine a transition from carpet to laminate/wood, have never seen it anywhere - is this even possible to do? I'd prefer to carpet the stairs though, so even if I use laminate in all of upstairs, there'll have to be a join somewhere.... so confused!
3. Very very roughly, how expensive would it be to do this (laminate costs + labour)? The room's approximately 10ftx10ft.

Thank you!

You. An easily go from carpet to laminate you just get an edging strip/ threshold to match the laminate. It is noisier than carpet and I wouldn’t do it if the carpet is nice as teenagers have a habit of spilling stuff. However, you can do it yourself quite cheaply. We have laminate in 2 bedrooms and it’s fine.

It can be pretty noisy depending how heavy she is on her feet, dropping things etc.
Difference in height depends how thick the carpet is, how thick the laminate is but it’s not something you generally see or notice. It’s very slight.
Totally possible, remove carpet and underlay, new underlay for laminate and planks on top! Very easy to do.
The only joins would be on the door wells where there’ll be a bar anyway. So your carpet on landing and stairs will be fine.

Costs depends on flooring. So your square metres is approx 9.29m2 for the room, give yourself a little more for different cuts or a cut is done wrong.
A lot of flooring sites make you put in the m2 measurement and it calculates the costs and how many packs you need. Underlay for laminate can pick up for £20 a roll.

I've had LTV down in the bathroom and pretty pleased with it - you could go for that in the bedroom

Thank you everyone!

I worked in a nursery where they had the carpets of the upstairs (preschoolers) rooms swapped out for laminate. It was so much nosier, the babies downstairs couldn't sleep!