[1] It was built as a country estate sometime between 1787 and 1840 by Samuel Ewalt, and remained standing after most of the land was subdivided for residential lots in the 1870s.

[2] The house was built sometime before 1840 by Samuel Ewalt (1750–1847), a merchant and landowner who was a prominent citizen during Pittsburgh's early history.

The land in this area was divided into narrow strips perpendicular to the Allegheny River, providing riverfront access to each landowner.

[2] In August 2019, the house was hit by a windburst which damaged the roof supports and put pressure on the foundation which already was bowed and faltering.

[4] However, the City Council later voted on August 26 to withdraw the nomination, and on September 24, they approved the owner's demolition permit.