Police have arrested a 35-year-old man after busting open a large drug operation with more than 260 cannabis plants at a Papakura home.
Police arrived at the residence on an unrelated matter and smelt cannabis, police said.
They seized almost 1.4kg of dried cannabis as well as 268 plants in various stages of maturity.
Detective Senior Sergeant Rod Honan of Papakura CIB said it was one of the more sophisticated set-ups police had found recently.
"From the outside of this property nothing appeared to be out of the ordinary," Mr Honan said.