One of my early contacts in my genealogy search was Vincent Boliver. He is a 4th or 5th cousin. He still owned some property in the area and he sent me this photograph of the old Norman Bolivar (Granny's father) homestead. I believe this was torn down in the late 1970s. This dormer style is prevalent in Lunenburg County and is known as a "Lunenburg Bump". I understand the purpose was to catch the sea breeze and to also in most cases provide a bit of shelter at the house entrance.
The entire town of Lunenburg is designated as a Unesco World Heritage Site and is known for the very colourful architecture. I urge you to visit there. In the meantime you can take a virtual tour.