The planning application has been approved by Moray Council and work can now begin on the project.
Enda O’Sullivan, global brand director of Glenfiddich, said: “As a family-owned business it is in our DNA to protect the future and think in the long term.
“This means managing our stock profile carefully and leading the category through innovation and creativity.
“The expansion plans enable us to help meet these objectives.
“We are delighted that the plans have been approved and that we can continue to meet the needs of our discerning drinkers all over the world long, long into the future.”
Glenfiddich is part of the family-owned William Grant & Sons drinks group.
Founded in 1887, William Grant also owns The Balvenie, Hendrick’s Gin and Drambuie, which it acquired in September 2014 for an undisclosed sum.
The group recorded record post-tax profits of £139.8 million last year, despite a 16% fall in turnover to £933.2 million.
Profits among its core premium-brand range were up 9%, despite challenging market conditions for Scottish whisky, exports of which fell 7% in 2014.
Turnover for 2013 was £1.12 billion, generating post-tax profits of £131.9 million.