 Construction of a new courthouse in Nashua was authorized in 1901, after significant population growth in the region taxed the existing county's facilities.The county purchased land from Dr. Edward Spalding, and retained Daniel Woodbury of the Boston firm Dana & Woodbury to design the new building.The building was completed in 1903, housing probate facilities and county offices on the ground floor, the main superior court chamber on the upper floor, and vaults and jail cells in the basement.