Grantham, and Eastman especially, was largely built in waves, which means whole streets of houses went up within a few years of each other and are now reaching the end of the same roof at the same time. If your neighbors are getting quotes, that is usually why. These are wooded lots with real tree cover, so we see a lot of moss and algae on shaded slopes and a lot of debris sitting in valleys, which holds moisture against the roof. It is also worth knowing whether your association has anything to say about color and material before you pick one.