Dean House (Portland, Arkansas)  The Dean House is a historic house off U.S. Route 165 in Portland, Arkansas. The 1.5 story house was designed by architect Charles L. Thompson and built c. 1910. Stylistically, it is a Louisiana Raised Cottage, a simple rectangular shape mounted in a foundation with brick piers. The roof extends over a wraparound porch, which is supported by Tuscan columns. The roof is pierced by a pair of gabled dormers that are decorated with fish-scale shingles. The house was listed on the National Register of Historic Places in 1982.