Sigma Alpha Epsilon Fraternity House, Prairie School fraternity house at University of Illinois, Champaign, United States.

The Sigma Alpha Epsilon Fraternity House is a student residence building in the Prairie School style located at the University of Illinois. It features characteristic horizontal lines, limestone trim, and tall supporting piers that rise prominently above the front porch roof.

Built in 1907 by architects George and Albert Dean, this house became home to the Illinois Beta chapter founded eight years prior. The design reflects the Prairie School movement that shaped architectural thinking in the region during the early twentieth century.

The Illinois Beta chapter of Sigma Alpha Epsilon was founded in 1899, making it one of the oldest fraternities at the University of Illinois; its members moved into this 1907 house. The building still serves as fraternity housing for chapter members at the university.

The house stands at 40.10778, -88.23556 in Champaign, on the University of Illinois at Urbana–Champaign campus. It is a private chapter residence, so visitors see it from the public street and sidewalk; the porch piers, limestone caps and exposed rafters are the details to look for.

This structure uniquely blends both Prairie School and American Craftsman architectural approaches, a combination rarely seen in other fraternity houses. This fusion makes it an uncommon example of how different design movements influenced building practices of that era.