Community land trusts are nonprofit, community-based organizations designed to ensure community stewardship of land. Community land trusts can be used for many types of development (including commercial and retail), but are primarily used to ensure long-term housing affordability. To do so, the trust acquires land and maintains ownership of it permanently – entering into long-term, renewable ground leases (99 years) with prospective buyers. A community land trust can also lease land to developers of affordable rental communities, and can act as a co-developer.