It is built of cut granite, fieldstone, and dark red sandstone, most of which came from Searles' own quarries in Pelham, New Hampshire.

[2] When Searles died on August 6, 1920, he left the castle to his executive secretary, Arthur T. Walker.

When Mr. Walker died seven years later, he left the castle to his niece, Iva C. McEachern, who sold it to real estate broker Frank M. Andrew in 1930 for $2 million.

[2] In November 2001, the Sisters of Mercy contracted David and Linda Kolifrath of Salem, New Hampshire, to organize and manage events held at the castle.

At this time it was decided that operations would be expanded to include weddings and receptions in the castle courtyard in an effort to better utilize the facility, better serve the needs of the public, and to raise additional funds to further the charitable programs of the Sisters of Mercy.