The project which saw an investment of over €2.2 million was undertaken over the last two months.
Local company Ned O Shea and Sons were engaged as the main contractors for the work.
Garveys have been trading in Rock Street in Tralee since 1992 and employ over 80 people. An additional 10 jobs are to be created as a result of the investment.
It follows on from a refurbishment of Garveys Dingle store in 2015 which culminated in the shop winning Supervalu Store of the Year.
Jim Garvey of the Garvey Group said the work highlights the fact that the company will continue to repay loyal customers by investing back into the local economy.