Grandpa Greene’s, based on the canal in Diggle, will shut its doors on September 2, 2026, for a complete rebuild. A spokesperson for Grandpa Greene’s said: "This September, we’ll be closing the doors at our Diggle site. "It’s the beginning of the biggest chapter in Grandpa Greene’s history. Lotus sundae at Grandpa Greene's (Image: The Oldham Times)The company has encouraged customers to share their memories as it marks the end of an era. "You have made Grandpa Greene’s what it is today, and we truly couldn’t have done it without you.