The building, which is now mostly taken up by county offices, was listed on the National Register of Historic Places in 1974.

The main block is roughly rectangular, with a central gabled section flanked by hip-roofed wings.

The gable front is fully pedimented, supported by six granite Doric columns and topped by a wood-frame open belfry, its corners supported by groups of Doric columns.

The building corners are quoined with lighter granite blocks, and iron railings run between the columns of the portico on the second level.

The building is one of the state's best examples of early Greek Revival architecture, and is the first documented appearance of a temple front.