The William Costen House, also known as the Old Costen Homestead, was a historic home located near Wellington, Maryland. It was constructed in 1829, and was a two-story, three-bay, gable-front side-passage/double pile frame house on a common bond brick foundation. ()
It was listed on the National Register of Historic Places in 1985, and delisted in 1994, after being burned to the ground.
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