Man arrested after $200,000 drug raid in Perth

Fifty cannabis plants worth $200,000 have been seized in a drug raid at a Welshpool commercial property, southeast of Perth.

The hydroponic drug setup was hidden in the small storage unit.

"It's a sophisticated setup; it was done by professional," Detective Sergeant Dale Harmer said.

Detectives raided the Briggs Street unit from 9am this morning.

They say the man inside was shocked when police arrived.

"It is a large haul for us. This is more and more the norm... these commercial properties, there's not a lot of traffic," Detective Sergeant Harmer added.

Detectives believe the plants have been growing in the warehouse for at least six weeks.

Thirteen high-value bikes, believed to be stolen, were also seized by police.

A man at the property was arrested and is being questioned.

He is set to face charges of possessing and cultivating cannabis with intent to sell or supply.