The family-run business is the largest independent in Gloucestershire, and completed a £2.5m restaurant and retail development in the spring of 2014.
The business reported an increased turnover of 24 per cent year for year in April.
The site’s current footprint is 5,200m², and the new project will bring the total covered retail area to almost 6,000m².
Managing director Tim Greenway said: "The new development completed last year has transformed the way customers enter and flow through the site, and that has proved really successful for us. We’re constantly looking at ways to improve the business and appeal to customers, and this latest project is simply about bringing one of the older, quieter corners in line with everything else. Like every retailer, we need every inch to earn its keep, and it’s time we gave this little area a bit of a makeover to help it do that. Now it’s just a matter of pinpointing a quiet trading time to get started."
Plans have already gone out to both local and national contractors for pricing. The first window of opportunity is this autumn or early January 2016.
Malcolm Scott Consultants are the planning agents. Planning was granted to erect a 490m2 shop extension mainly for garden sundries and pet products and 277m2 of open-sided canopy. This brings the total covered area on the site to 7,658m2.