The €16 million redevelopment plan was announced at the start of the summer and once completed the company are hoping to add an extra 250 staff to the Storehouse.
As well as the creation of a new 360 degree space which will directly link to the original Gravity Bar there will be a new three story facilities building that will provide extra space for the Guinness archives, retail storage and an employee hub.
The Gravity Bar, one of tourists’ favourite Irish attractions, will be able to remain open while the works are completed.
The Storehouse has had almost 16.5 million visitors, including Queen Elizabeth and Barack Obama, since it opened in 2000.
The St James’s Gate site was Ireland’s most visited attraction in 2016, welcoming 1.6 million people which was a 10 per cent increase on 2015 figures.