[Stellavision]

I have posted a queery else where on the forum which has gone unanswered, so I'll try and put it a different way.
My new house I am buying is only joined at the top of the house, ie there is a shared back passage through to the back of the house between the neighbours front room and my own (to be), but the houses are joined at the bedroom.
What kind of measures could I take for sound proofing if any?
It appears the only threat of noise to next door is via their adjacent bedroom.

[Gary Lightfoot]

You could build a second wall in front of the existing wall - there are a few existing threads here with links that you might find useful.

Basically, you build a studd wall about an incha away from your existing party wall, fill it with rock wool, and finish it with two layers of plasterboard. Seal all gaps/edges with silicon rubber before installing skirting etc.

There are variations on that theme, so choose the one that you feel fits the bill best for your situation.

HTH

Gary.

[AMc]

The only way that you can be sure if you need to soundproof is to ask you neighbours if they can hear you or go round an listen when you've got your system cranked up.
If they/you can't hear anything then you're fine - if you can hear something you can see if it bothers them and if it does tell them you're going to sound proof.
My neighbours have the odd loud party about 3 times a year but knock it on the head if we ask them to. It doesn't bother me at all as it means I can crank up the subwoofer on a Saturday night without feeling guilty!