Presumably they could have built dwellings mainly from timber?
With the addition, in some cases , of turf and heather .
The LBK European longhouses were nearly all wooden .
Worth mentioning that some of the earlier British Neolithic buildings , although few and far between , sometimes had stone walls e.g. Skara Brae ,Knap of Howar and the later Dartmoor round houses could also have had stone walling .