Eleanor Coade died at Lyme Regis, Dorset, after a period of declining health. Her death marked a turning point for the business, as she was the driving force behind its success.

Following Coade's death, the business was managed by John Sealy and then passed through various ownerships. The original formula for Coade stone seems to have been lost, and the quality began to decline. New tastes in architecture also contributed to the reduced demand.

The Coade Stone manufactory finally closed in 1833, due to declining demand, loss of the original formula, and increased competition from other materials. The closure marked the end of an era for artificial stone production in Britain.