More than 100 cannabis plants have been discovered at a house in Sprowston.
Officers carried out a warrant at the property on Blue Boar Lane, near Wroxham Road, at around 6.50am on Tuesday, April 17.
Police said more than 100 plants were seized in the raid.
A man in his 20s was arrested in connection with the incident. He has since been released on police bail until Sunday, May 6 while enquiries continue.
The house, which is near to the Tesco roundabout, still had its front door covered with boarding.
It comes just days after police uncovered one of largest cannabis factories in the county in recent years. On April 11, officers found up to 4,000 plants inside an outbuilding on Holt Road, Felthorpe.
They were being grown in a number of old sheds and greenhouses - siphoning off electricity in the process - which raised the suspicions of the landowner.
Call Norfolk Police on 101 with information.
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