Police say a raid on a major marijuana growing operation could put a dent in the North Vancouver Island supply.

Comox Valley RCMP found almost 1,100 marijuana plants in a large converted workshop on a rural property in the farming region of Black Creek, at the northern end of the Comox Valley.

Const. Nicole Hall said it was bigger and more organized installation than the operations they usually find.

"It was more elaborate than a lot of what we're used to dealing with, so definitely some people that had some expertise in the area of electricity and setting things up," Hall said.

Hall said police received reports of suspicious activity earlier this fall the rural property, which lies between Campbell River and the Comox Valley.

They raided the lot on Macaulay Road this week and found a large workshop built with multiple growing rooms, expensive greenhouse equipment and a sophisticated electrical system.

"There was a lot of money spent setting it up, and in setting it up so that we would not know about it," she said.

Hall said the bust will keep a lot of product from getting to market.

"It's definitely of a significant value and impact on the drug distribution to our local area."

A 27-year-old man from the Lower Mainland is expected to face charges of electricity theft and production of a controlled substance.