The Kauppilanmäki museum area is in the centre of Valkeakoski, a couple of hundred metres from Myllysaari, on the southern side of the canal. This local history museum area has five dwellings, which display the housing conditions of workers at paper mills in the late 19th and the early 20th century. The area also has a community hall, a smoke sauna, a carriage house, and a storehouse. The museum is open in the summer months, when the area also is home to sheep and chickens. Kauppilanmäki hosts a range of events throughout the year, including a handicraft fair in July and an old-time Christmas event in December.
The Kauppilanmäki museum was established by the Valkeakoski-Seura society and opened in 1960. In 1973, the society donated the area to the City of Valkeakoski. A ticket for the Kauppilanmäki museum includes admission to the Myllysaari Museum, so you can visit its permanent and changing exhibitions at the same time, as well as the Finnish Football Museum, in the same building.