A group set up by the health board to examine the future of health care in the area has recommended shutting the homes in Melness and Melvich.
A location has still be to suggested for the new building.
However, it has been recommended that other health services could be relocated to the hub.
NHS Highland and Highland Council expect to consider a more detailed proposal early next year.
Two care homes in north Sutherland could be closed and the residents moved to a new, single "hub" complex, NHS Highland has said.