The factory was discovered by heat source detectors on a police helicopter and a warrant was executed by officers at 9am.
Sergeant Rachael Welch, who led the team, said: “We found almost 70 plants in the property which were ready for cropping and we are really pleased to have removed the plants before they reached the drugs market.
“As a force we take offences involving possession and supply of drugs very seriously and are committed to stopping drug supply before it can have adverse effects on our community.”