"A community land trust (CLT) is a private, nonprofit corporation whose mission is to acquire,
hold, develop, lease and steward land for making uses such as housing, farmland, gardens,
businesses, and other community assets permanently affordable for current and future
generations. A CLT’s bylaws prescribe that the governing board include individuals who reside in the CLT’s service area and have meaningful representation from individuals who currently or
may in the future live in the CLT’s homes."
Click to learn about a Community Land Trusts from the regional consortium of CLTs. Want even more background, see this in Wikipedia.