Good evening everyone. We're considering buying a GII C18th cottage near Gloucester. The ceilings are very low indeed (5'5" in some rooms with the main beams lower still) so are talking to a local specialist builder about lowering the floors and installing new limecrete floors (currently parquet on what we think is concrete). We're going to be doing some exploratory holes outside to confirm it's possible to successfully dig down (roughly 700mm), but I'm just trying to get a ballpark cost please. The whole downstairs across the 4 rooms is approx 56 sqm. We'd then need to also install a French drain around the outside too. Many thanks for any help.