A search warrant by neighbourhood officers in Oldham conducted a search warrant at a property on Higginshaw Lane in Royton located over £1million worth of mature cannabis plants.
A detailed inspection found the electricity supply had been bypassed too as part of a sophisticated setup.
Officers arrested a man in his 20’s on suspicion of cultivation of cannabis.
An investigation remains ongoing, whilst the haul will be dismantled, seized and destroyed.
Inspector Stuart Berry of GMP’s Oldham District, said: “This is a great example of our neighbourhood officers acting on information from the public to keep our communities safe.
“We know drugs supply has widespread consequences across Greater Manchester, and in Oldham we are determined to continue our approach of taking the fight back to the criminals on issues that matter the most to our local residents.
“We will continue to listen to concerns and take them on board when prioritising where in your community we need to have visible presence and what we need focus on to make people feel safer.