Main Barn – UGA 4613 (1920, Category 1). The Main Barn is located at 106 Plant Science Drive. It was the first substantial work structure built at the station. The barn is a solid, three-story concrete structure with a gambrel wood-framed roof clad with modern metal roofing. One-story concrete block additions have been added to each side.
On the Plant Service Drive elevation, the historic barn door openings on the upper floor levels, windows at the third floor level, and a door at second floor level have been infilled with wood siding, . Original flanking windows appear to have been replaced. On the rear elevation, the original barn doors appear to remain at the third floor level, while the second floor level has been infilled. Flanking windows have been replaced with non-historic windows at the third floor level and are covered and not visible at the second floor level. The original open passage remains at the ground level. The Main Barn is one of the oldest structures to survive on campus. It is a good example of an early twentieth century working farm building, and appears to be individually eligible for listing in the National Register of Historic Places and is assessed as Category 1.