Welcome to the D.D. Cook companies. When it comes to real estate in the Seacoast of New Hampshire you won`t find a more complete resource. Our roots as a premier builder with a solid reputation have grown to encompass the full services of a real estate agency. Just ask any Realtor, building inspector, loan officer, or contractor in the area and you`ll see how we’ve gained the respect of our peers. Put us to work for you and join our long list of satisfied home building and real estate customers.