Police discovered around 160 cannabis plants with a street value of more than £130,000 at a property in Newent yesterday.
A 25-year-old man was arrested on suspicion of producing a controlled drug and cultivating cannabis.
The find was dismantled after it was made safe by electricians.
Inspector Nick Cook said: “Drugs can have a devastating impact on people’s lives and often go hand in hand with other types of criminality.
“We will continue to proactively target these operations and welcome any information you have about this kind of activity in the community. People coming and going at all times and properties with blacked out windows are just a couple of things to look out for.
“If you believe drug activity is taking place you can report this to us on our website or through Crimestoppers anonymously by calling 0800 555 111.”
A man has been charged and is due to appear in court later this month.
Anyone with additional information about this latest drugs incident can contact police through this website, quoting incident 346 of 9 November: https://www.gloucestershire.police.uk/contact/af/contact-us/us/a-crime-that-has-already-been-reported/. Alternatively, you can also call police on 101.