Sea Colony was developed on 114 acres of ocean front on the last remaining large tract of land in St. John’s County. Rather than locate home-sites over the entire area, home-sites were clustered to allow the remaining areas to remain in their natural state. Because common areas are under the control of the community, neither vehicular nor pedestrian traffic is permitted in these areas, except on designated dune walkovers and Sea Colony Parkway.

Three conservation areas, one ocean side and two interior areas are areas that are under community control and have been preserved in their natural pre-construction state. Observations of a diverse fauna of birds, deer, turtles, small mammals indicate that enough area was preserved to maintain a native fauna.

The ocean-side conservation area extends from the high tide line to the Ocean Front homes is a natural dune area. It not only serves as a broad buffer area protecting Sea Colony homes from storms, but also is the natural habitat for a host of resident species, including three designated rare and endangered species. 

The two other conservation areas are north-south linear features extending between building sites. These marshes provide drainage from the home-site areas, are groundwater recharge areas, and allow for natural surface drainage off-site to the north.  They also provide spatial separation of homes that border these conservation areas.