The Spanish Eclectic Casa Del Rey Apartments building, built in 1929, is a four-and-one-half-story, yellow and orange brick structure located south of Huron Street on the southeast corner of Oneida and Algonquin Streets. The front faces Oneida on the west, with the rear of the structure facing vacant lots to the East on Seminole Avenue. Originally built with forty-one units, it was the largest apartment building in Pontiac at the time. Interior walls are done in antique plaster. Natural oak trim is found throughout the building while elaborate use of colorful clay tile is found throughout public spaces and on fireplaces in many of the individual apartments.