Norcross Brothers, Contractors and Builders was a nineteenth-century American construction company, especially noted for its work, mostly in stone, for the architectural firms of H.H.
The architect of the school was a young, but soon to be famous, Henry Hobson Richardson, and from then on Norcross Brothers became Richardson's favorite contractor, ultimately building more than thirty of his designs, including three considered by many his best work: Trinity Church in Boston, Massachusetts; the Marshall Fields & Company building in Chicago, Illinois; and the Allegheny County Courthouse in Pittsburgh, Pennsylvania.
When MM&W opened a new office in New York City, in 1894, the Norcross Brothers had their own space within it.
Though largely self-taught, he had developed the skills needed to solve the vast engineering problems brought to him by his clients.
Because of their need for stone, a primary building material of the time, was outpacing the supply the brothers eventually acquired their own stone quarries, first in Connecticut (Branford) (now on the National Register of Historic Places) and in Massachusetts, and later in Westchester County, New York and in Georgia.