Abram Huston House and Carriage House, also known as the Coatesville City Hall and Police Station and "Graystone Mansion," is a historic building located at Coatesville, Chester County, Pennsylvania.

It was designed and built in 1889, by the architectural firm of Cope & Stewardson.

The carriage house is L-shaped, and features a two-story tower with a conical roof.

The house was built as the home of Abram Huston, president of the Lukens Steel Company.

[2] It was added to the National Register of Historic Places in 1977.