The Marshall Orr House is a two-story, timber-framed residence dating to the mid-to-late nineteenth century, situated on a gently sloping rural lot characteristic of agricultural homesteads in the region. The house exemplifies vernacular interpretations of Greek Revival domestic architecture adapted for a rural South Carolina setting, retaining much of its original structural fabric and plan.

The building is rectangular in plan with aside-gabled roof of moderate pitch, historically sheathed in wood shingles and now covered with standing-seam metal. The house rests on a brick pier foundation, partially infilled with later brick to improve stability. Exterior walls are clad in horizontal weatherboard siding, attached with cut nails consistent with nineteenth-century construction practices. Twin interior brick chimneys rise from the gable ends, providing hearths for multiple rooms.

The principal (south-facing) façade is organized in a three-bay symmetrical composition, centered on an entryway framed by simple square pilasters and a plain entablature. The original four-panel wooden door is flanked by narrow sidelights and surmounted by a rectangular transom. Fenestration consists of evenly spaced double-hung sash windows, typically six-over-six, with molded wooden surrounds and paneled wooden sills. Second-story windows are aligned with those on the first floor to maintain symmetry.

The interior plan follows a central-hall configuration, with primary rooms on either side of a longitudinal hallway extending from the front to the rear. Structural framing is heavy timber, employing mortise-and-tenon joinery with pegged connections. Surviving interior finishes include heart-pine flooring, plaster walls over wood lath, molded baseboards, and early nineteenth-century mantels with restrained Greek Revival detailing. The main stair, located within the central hall, features turned balusters and square newel posts.

A one-story rear ell, likely added in the late nineteenth century, contains service spaces such as the kitchen and storage rooms. The ell is clad in matching weatherboard and features a shed-roofed porch supported by chamfered posts. Evidence of early twentieth-century updates includes selective window replacements, the addition of mechanical systems, and minor interior refinements, all executed with minimal impact on the house’s historic character.

The surrounding property historically included ancillary agricultural structures, such as a smokehouse, barn, and small sheds. Though some of these outbuildings have been lost, the overall spatial organization of the homestead remains discernible. Mature trees and early landscape elements contribute to the site’s historic rural setting.