There are 12 real estate agents found in Grantham, NH. View our Grantham real estate area information to learn about the weather, local school districts, demographic data, and general information about Grantham, NH. Get in touch with a Grantham real estate agent who can help you find the home of your dreams in Grantham. Use our mortgage calculator to see how much it would be to finance a home in Grantham. Not ready to buy yet? Find and compare apartments for rent in Grantham.