The Marshall School is a 2 story, 5 bay, rectangular plan, Tudor Revival-influenced, masonry, institutional building. Constructed in 1922 to meet the growing population of Montrose Park, the elegant stone and brick building features a side gable roof intersected by front-facing, gabled, flanking projecting ends and a gabled wall dormer entrance. Tudor Revival features include half-timbering in the gable apices; stone, Gibbs-like window and door surrounds set into the brick walls; and massive brick chimneys. The school has recently been expanded but without detriment to the original design of the building.