St. Hyacinth School and Convent is comprised of two neighboring buildings: the 1893 original school and convent building, a three-and-a-half story brick structure with a mansard roof; and the 1921 two-an-a-half story flat-roof brick convent building that was constructed to allow the first building to be utilized fully for the school.
The 1893 red-brick school building has a granite foundation and slate shingled mansard roof punctuated with full-height gabled dormers on all sides. The original entrance porch with columns and balustrade was removed in the mid-20th century.
The combination of brick masonry and granite trim and interior finishes are typical for late 19th century school construction in Maine. The plan is atypical for late 19th century school construction in Maine in that it was also designed to provide separate living quarters within the building for the schoolteachers.
Acquired by Avesta in 2011 and refurbished in 2013, the property boasts 37 affordable homes across three buildings situated on Walker Field in the Frenchtown neighborhood of Westbrook.