Complex sentence: The Philadelphia School of Design purchased the house in 1880, and an extensive addition was made along Master Street through to Carlisle Street to house art studios, and the northern façade was changed with windows made consistent from the older house through the rear.
Split into simpler sentences: The Philadelphia School of Design purchased the house in 1880, and an extensive addition was made westward to Carlisle Street to house art studios. The Master Street façade of the addition was changed with windows made consistent from the older house through the rear.