Originally Posted by QuiltnNan
I've seen it done that way. I've done renovations in my various homes in the past. I would not do it that way. The carpet does not have to be ripped up and replaced. The part that will be covered by the wall can be cut out. Then carpet tack needs to be placed next to the wall and then tightened to it. HTH
This is how my DH would do it and he was a contractor for 25 years. You want to have your framing as solid as possible and leaving the carpet down at least where the wall will be would not allow you to do that. Best to have them snap line where the wall will be and cut out that section.