I have been looking at houses and have seen an ideal one apart from the fact I would like an annexe as I will be moving 100's of miles from friends and family and would like them to stay. This house has lapsed PP to extend. Does this mean it is pretty much guaranteed that the PP could be reinstated? Also any ideas very roughly how much it would cost to build a smallish annexe (maybe one bed, bath and sitting room/kitchenette downstairs? Under £40k? Thanks for any comments/experience :-)