Police swooped on a building in Mixenden looking for drugs.
A large amount of suspected amphetamines were seized from the property after the raid on Thursday.
A 25-year-old man was arrested and bailed pending further inquiries.
Meanwhile officers from the Upper Valley neighbourhood policing team uncovered 100 suspected cannabis plants in a raid in Sowerby Bridge.
The plants were seized from the commercial premises.
Anyone with information about drug dealing should call police on 0845 6060606 or CrimeStoppers on 0800 555111.