washhouse

noun

1. A domestic outbuilding used as a laundry.

   “Now I'll see things walking a road that fifty other men would miss. I'll give you an instance, connected with the robbery of a wash-house copper."”

2. A public laundry.
3. (New-Zealand)A room in a house used for washing laundry; a utility room.
4. (UK, historical)A public facility where people could wash themselves and their clothes.

   “[…] the washhouses complied with the Factory and Workshops Act of 1907.”