The company plans a major overhaul of the store, including tearing down an internal wall to create a more open aspect, increasing the size of the windows and adding new parking spaces.
"We have worked around the architecture of the building for years and had to compromise the layout," said chief operating officer Ewen Chisholm. "Currently it's almost like two stores in one because of the internal wall. We hope to create the best convenience store in Scotland."
The company has applied for planning permission to renovate the 4,000sq ft store, which it hopes to complete by April.
The store lay-out will be redesigned, with the post office to be moved from the front to the back, fresh produce and food-to-go areas installed near the entrance and the off-licence section improved. The tills will be redesigned to make shopping faster.
David Sands is to start surveying focus groups to find out what its customers would like to see in-store. It opened its 27th store, in Markinch last week.