Em português simplesmente dizemos "roupa suja" ou "roupa para lavar".

Laundry = Lavanderia ( Where we wash the clothes, can be a part of house or a Business place) Other name is : "área de serviço" for House part only.

"laudry" =Lavanderia =Is a place in the home or a company where washes the clothes. wash the clothes=Lavas as roupas. Apologies by my english.