Cooling added: "Development is on track for opening in spring 2009."
Burton-on-Trent-based builder George Hodges and Son is working on the project and is proving to be a leading choice for those wanting to expand their garden centres.
Cooling said: "Hodges, so far, have been great, thoughtful and pro-active, very conscious of health and safety issues. All in all a great weight off my mind."
Hodges completed work on a restaurant and food hall this month at Raglan Garden Centre in Monmouthshire for GCA chairman Martin Davies and are almost finished at Frosts £2m extension in Woburn Sands for MD Paul Wright.
Previous high profile garden centre clients include Poplars and Scotsdales.