The Grenfell Historic Society is a registered charitable organization that has been incorporated since April, 1978. The statement of purpose of the Grenfell Historical Society describes the mandate of the society as follows:

To collect, preserve, exhibit and interpret the following:

1. Artifacts which are relevant to the founding of the Grenfell mission and its effect on the Northern communities in relation to medical care, the fishing industry, handicrafts, schooling, and the care of orphans.
2. The writings of Dr. Grenfell, including his books, letters and art which help the public know and understand him.
3. Material relating to his family.
4. Material relevant to his co-workers, successors, and people of the area.

In keeping with the statement of purpose of the Grenfell Historical Society, in 1994, the process began whereby the Grenfell Historical Society, in partnership with Grenfell Development Inc., and Grenfell Handicrafts Ltd., joined together to oversee the implementation of the Grenfell Master Plan.

This plan oversaw the development of a new interpretation centre, development of the trails leading to Tea-House Hill (the burial site for Grenfell), the relocation of Grenfell Handicrafts, the continued restoration of Grenfell House Museum, the relocation and enhancement of Grenfell Park, and the enhancement of the waterfront properties which are adjacent to the new interpretation centre.

As of the spring of 1998, the Grenfell Historical society, with its many partners, were successful in co-ordinating the implementation of many of the overall objectives of the Grenfell Master Plan. During the summer of 1998, the Grand Opening of the new interpretation centre launched many of the new legacy events, infrastructure and programming that now make up the Grenfell Historic Properties.