North Wales Polie said that on December 23 at approximately 6pm, a number of men entered the derelict building on East Parade.
It was reported that they had forced their way into the property by smashing the glass at the front before leaving the property carrying bags.
Detective Inspector Kris Williams said that, upon attending the scene, a large-scale cannabis growth, with an estimated street value of £1.5 million was discovered inside the premises.
