Pest House, Historical quarantine facility in Stillwater Township, United States.

The Pest House is a former quarantine building in Stillwater Township, Minnesota, originally of three rooms, with a porch added on the southeast and a rear wing on the northwest when it became a private residence. It stands on a hill outside Stillwater, where the city built it in 1872.

The structure was built in 1872 and operated as an isolation facility until 1910 to treat patients with diseases like smallpox, scarlet fever, typhoid, and diphtheria. After it closed for medical use, the building was converted to other purposes.

The building shows how communities once handled contagious disease by creating separate spaces for the ill. It reflects a time when removing sick people from town was the accepted way to protect others.

The building is now a private residence and not open for public visits. It sits on a hilltop outside town, making it difficult to reach from the main road.

The Pest House was listed on the National Register of Historic Places in 1980 for its local significance in health and medicine. It is a rare surviving example of a pest house, the isolation strategy used for contagious disease in the late 19th and early 20th centuries.