Officers from Emerson Park Safer Neighbourhood Team searched the property, in Nelmes Way, where they found 192 cannabis plants being grown.
They also discovered a younger crop of the same amount which was ready to replace them.
A total of 17 areas were growing the drugs which are estimated to be almost 20kg worth of Skunk cannabis.
Three men were arrested at the scene and charged with a variety of offences.
24-year-old Mathew Emin, from Great Warley, Brentwood, pleaded guilty at Snaresbrook Crown Court on 15 February 2019. He was jailed for 33 months and given a £170 fine.
Glen Paterson, 61, from Springfield, Chelmsford, and Adam Styne, 39, of Stanmore, Middlesex, were found guilty on 25 January 2019 at the same court.
Paterson was sentenced to 18 months imprisonment suspended for 24 Months with a £140 fine.
Styne received a 21 months imprisonment suspended for 24 months and a £140 fine.Tags: Havering, Emerson Park
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