The Moffatt-Ladd house remained in the Ladd family until 1911, when it was eventually sold to the National Society of The Colonial Dames of America (NSCDA), an all-woman organization who wanted to buy the home and preserve it's rich historical value while also offering exhibits that educate the public about American History. Behind the Moffatt-Ladd House is a large garden that is almost as old as the home is. This garden with four different terrace levels was primarily kept up by Alexander Hamilton Ladd who had a gift and love for gardening. In the garden can be found a rose bush that was planted by Samuel Moffatt's wife Sarah in the 18th century that has been re-budding every year since, as well as various other flowers, shrubs, and herbs. A large and historic horse chestnut tree can be found beside of this home, and it was planted by William Whipple.
There are multiple events hosted at the Moffatt-Ladd house throughout the year, such as benefit parties and dinners, local auctions, concerts, lectures, festivals, and even overnight camp for children who would like to know what it is like to work at a historic site. The garden itself can be can be rented for things such as weddings or wedding parties, and a number of other things as long as the plants growing there are respected. The regular price for a tour of the house and garden is $7 for an adult and $2.50 for a child, and the price for visiting only the garden is $2. A season garden pass is also offered, and it is $15.00. Have a large group? Just be sure to book at least a week in advance and it will be $6 a person. With over 80 different pieces of historic furniture, art, and other artifacts, the home and garden remain one of the highlights of a visit to Portsmouth.