?Edgecliff?, a cottage in Southwest Harbor on Mount Desert Island on the coast of Maine, is a good, early example of a Shingle Style/Queen Anne coastal cottage. It is significant because it evolved from a Shingle Style cottage with Queen Anne elements when it was constructed in 1886-87 to a Shingle Style/Queen Anne hybrid after it was added onto in 1910-11. The new addition was more Queen Anne in style, but it used many design features to unify it with the original design. The original portion of the cottage has many features of the Shingle Style, including wood shingles on its exterior; a steep, irregular roofline, a roof that encompasses a wide, sheltering porch; an asymmetrical fa?ade; and bay windows. It has corner boards on its first story that are more characteristic of the Queen Anne style. The 1910-11 addition also exhibits more Queen Anne than Shingle Style elements. William Augustus Bates was the architect for the original cottage. It is not known who designed the addition. Its period of significance includes its construction in 1886-87 and its alteration in 1911.