Transferable development rights

Transferable development rights (TDR) is a method by which developers can purchase the development rights of certain parcels within a designated "sending district" and transfer the rights to another "receiving district" to increase the density of their new development. The underlying legal concept of a transfer of development rights programme is the notion that all land has a bundle of property rights.

Source: Wikipedia — Transferable development rights (CC BY-SA 4.0)