It appears the current owners have attempted to start to convert it but then either given up or other circumstances occurred to prevent it being finished. I can see there’s still no central heating but a few bedrooms have been done and a kitchen is in.
The sales ad states the buyer will have to reapply to convert the property to residential as the granted permission lapsed over a decade ago. If planning was granted previously is it more likely to be granted now?
Is it unlikely that a mortgage be granted on this sort of property. TIA