Gluck Mill School is a one- to two-story brick institutional building constructed in the early twentieth century to serve the educational needs of the Gluck textile mill village. Positioned near the center of the planned mill community, the school occupies a gently sloping site that historically overlooked rows of mill cottages and stood as a primary civic landmark within the village landscape. Its design reflects early progressive-era architectural standards for industrial school construction, combining fire-resistant materials with symmetrical massing and modest classical detailing.

The building is rectangular in plan, constructed of load-bearing brick masonry laid in common bond with occasional Flemish-variant accents around openings. The principal façade is organized symmetrically into three bays, defined by shallow pilasters and capped by a raised central parapet. A recessed, centrally located entrance features double-leaf wooden doors set beneath a transom, framed by a cast-stone surround with simple architrave molding. Original concrete steps and metal railings remain in place, though some components have been reinforced in recent decades.

Fenestration is regular and rhythmic, designed according to contemporary educational standards emphasizing light and ventilation. Large, grouped double-hung sash windows—typically six-over-six or nine-over-nine—are set within segmental-arched openings with molded brick hoods and cast-stone sills. Many window units have been replaced with metal-frame equivalents, but original masonry openings and sill conditions remain intact. The rear and side elevations follow similar patterns, with slightly reduced window groupings corresponding to ancillary interior spaces.

The structure is capped by a low-pitched hipped or gabled roof (depending on documented form), originally clad in slate or asbestos shingles and now surfaced with modern composite materials. Historic photographs and surviving structural evidence indicate the presence of a central ventilation monitor or cupola, a typical feature of mill schools intended to improve interior air circulation. The roof framing consists of dimensional lumber rafters and purlins set atop load-bearing brick walls.

The interior historically followed a double-loaded corridor plan, with classrooms arranged symmetrically along a central hallway. Although portions of the floor plan have been altered, surviving features include plaster-on-lath walls, tongue-and-groove wainscoting, molded door and window surrounds, transoms over classroom doors, and original heart-pine flooring. Some classroom spaces retain blackboard surfaces, beadboard ceilings, and built-in shelving consistent with early twentieth-century school design. Stairwells at the ends of the corridor are constructed of wood with simple square balusters and newel posts, though reinforced with metal supports during later repairs.

A rear, one-story addition—constructed during mid-century modernization efforts—contains expanded service areas and mechanical equipment. While utilitarian in character, this addition is compatible in scale and setback, and does not obscure key architectural features of the original block. The basement or crawlspace level (depending on variant) contains evidence of early mechanical systems associated with heating and sanitation improvements installed as the mill village expanded.