Whitemarsh Hall was an estate owned by banking executive Edward T. Stotesbury and his wife, Eva, on 300 acres (1.2 km2) of land in Wyndmoor, Pennsylvania, United States.

Widener at Lynnewood Hall had recommended him to Trumbauer and to Eva Stotesbury, who moved into a house next to the estate to follow the progress of construction at close hand.

Whitemarsh Hall was finally sold for $167,000 to the Pennsalt Chemical Corporation (today part of Total Petrochemicals USA), which transformed the building into a research laboratory.

In 1963, Pennsalt (later renamed Pennwalt) built a new research center in the King of Prussia area, and moved out of Whitemarsh Hall, which was sold to a property investment group.

Efforts to preserve or sell the mansion intact by this and successive owners were unsuccessful, and as the property became neglected and vandalized over the following years, demolition was decided upon.

Disputes over the form of residential redevelopment to be undertaken (especially plans which envisioned luxury apartment towers) delayed demolition for a number of years.

The mansion, which was larger than the White House in Washington, D.C.[5] was demolished in 1980, and a development of modern townhouses called Stotesbury Estates was built on the property.

Small remnants of the huge gardens still exist today, including a fountain, several statues, stairs, and pieces of low stone fence and walls.