Hi, I dont mean to hijack this post but I cant seem to find the answer anywhere for this, im currently looking a a site with my partner for 150,000 then plan to build a house subject to planning for up to 150,000 , total including site 300,000.I am a first time buyer im told that this makes no difference as my partner already has a house.Can anyone tell me what stamp duty will have to be paid?Thanks in advance.