The house, in Blair Athol Drive, was raided this morning.

At this stage it has not been determined if there are links with another house, in nearby The Kraal Drive, where police found more than $4 million worth of cannabis on Monday.

Police said the two-storey house raided today was set up for growing the illegal plant.

Campbelltown commander Stuart Smith addressed the media earlier today.

He said the house was modified for cultivation of the cannabis.

"We haven't made a direct link with the drug house on The Kraal Drive but we're not ruling anything out," he said.

"Hall ways and walls in the house were modified."

Police are still at the house processing the drugs but at this stage have seized more than 300 plants worth an estimated $1.5 million.