The Dutch House is a historic Dutch-style villa built in 1855 according to a design by Józef Szalay. The villa standing at the exit of Kowalczyka Street, together with the Pod Bogarodzicą Villa and Domem nad Zdrojami, serves as the northern frontage of the square.

The building had housed the offices of the Spa Company since 1896. From the end of the 19th century, Doctor Rudolf Hammerschlag received patients here, and laterDoctor Roman Hammerschlag until 1939. During the German occupation, Władysław Szumowski, a doctor and professor at the Jagiellonian University, lived in the house and had been treating residents and visitors since the early 20th century. The Orbis Travel Agency operated on the ground floor from 1970 to 1990.

The ground floor of the building was built of stone, and the first floor was half-timbered. The ground floor was originally a one-bedroom flat with an alcove and kitchen, and the ground floor was a three-bedroom flat with a balcony and hallway.

In the 1960s, a bottling plant for Szczawniczanka mineral water and a warehouse for storing bottles and packaging were built in place of the stables and coach house above the villa in Kowalczyka Street. In 2007–2008, the bottling plant was demolished, and a Dutch-style building was erected. On the ground floor of the extension, the Spa History Museum was opened in 2010. It gathers exhibits on the spa's history and brings tourists closer to the region's traditions, colours, and peculiarities. Temporary exhibitions and other cultural events are organised here. NOTES: The museum is currently temporarily closed. An exhibition exploring more than two hundred years of the history of the spa and the Stadnicki family can be seen in the Pijalnia Wód Gallery.

The first floor houses the company's offices, which are used to administer the revitalisation of Szczawnica, founded by descendants of Count Adam Stadnicki.