A pakhuis is a warehouse. Pakhuizen were typically owned or rented by merchants or craftsmen who stored their wares. You may come across the term in cadastral, court, or notarial records. You may also see the occupation pakhuisknecht, a hired hand who worked in a warehouse.

Three warehouses in Amsterdam: Kleine groene Hert [Small Green Deer], Spitsbergen, Nijptang [Pliers], 1936. Credits: Amsterdam City Archives (public domain)
My ancestor Tymen Jansen & Jan Schouten lived in the Amesterdam “Lastage” where the “Schottenburch” ware house served as a storehouse for bulkheads (and masts?) for Dutch ships in early 1600’s. Wonderful that they still stand and serve.