The Betanzos washhouse is another of the many philanthropic works promoted by the García Naveira brothers. It was inaugurated in 1902 and has a surface area of 348 m², divided into two levels. On the ground floor there are two rows of wash basins, used according to the tidal level, with capacity for 22 washerwomen, as well as a hearth and covered drying areas. The upper floor also contains additional covered drying spaces.