GUINNESS parent company Diageo has received approval for a plan that would see its production capacity increase by up to 33pc.
Dublin City Council has granted the drinks giant permission to install a new barley roaster machine at its St James's Gate Brewery.
The grain is a key ingredient in Guinness and is said to give the stout its distinctive burnt flavour.
The machine will have an output capacity of 7,000 tonnes a year. As the three existing roaster machines have a total capacity of 21,000 tonnes, the overall capacity will be 28,000 tonnes a year.
When contacted, a Diageo spokeswoman was unable to say if consumers will enjoy a price decrease because of the economies of scale.
"Unfortunately, production volumes and pricing are of a commercial nature and we generally don't discuss that," she told the Herald.
In its report, the council noted: "The proposal comprises an intensification of the existing brewing process carried out on the wider St James's Gate site."
The number of barley roaster machines at the Dublin 8 site will have doubled in recent years from two to four when the new one is installed.