Penn Lyon Homes is a construction firm specializing in modular home design, systems-built homes, and commercial modular buildings with its products being distributed through independent builders, developers, and dealers. The company was founded in 1981, and today operates out of Selinsgrove, Pennsylvania. Penn Lyon has twice been named to the list of 500 fastest-growing privately held companies [1987, 1988] by INC Magazine. Penn Lyon closed in September 2010.