A converted former underground water reservoir in Barnstaple, Devon, is being offered for sale as a four-bedroom home. According to the outlet reporting the listing, the property is being auctioned with a guide price range of £400,000 to £450,000. The listing describes the home as a “unique” conversion of the reservoir, indicating that the structure has been repurposed into residential accommodation. The reporting notes that the guide price is positioned as less than the cost of a typical London flat, though no additional comparisons or wider market context are provided in the available excerpts. No further details are included across the sources provided about the auction date, condition of the property, energy performance, or ownership history. The information presented therefore focuses on the property’s location, its four-bedroom residential use after conversion, and the stated auction guide price range.