Wiloma is an architecturally successful blending of area vernacular forms with pattern-book detailing. The main body of the house is a large Valley of Virginia I-house, a popular vernacular house form in the first half of the 19th century. Fronting the house is a provincial interpretation of a two-level Greek Revival portico, a device frequently used in the Botetourt County region to give houses architectural dignity. Many elements of the interior woodwork, especially the mantels, are directly adapted from illustrations in the pattern books of Boston architect Asher Benjamin. The house was built in 1848 for Morgan Utz, a Fincastle merchant who served as a ruling elder in the Fincastle Presbyterian Church and a trustee of Botetourt Seminary. Unspoiled rural scenery reinforces the historic character of this dignified old house.