Public housing was only built with the blessing of the local government, and projects were almost never built on suburban greenfields, but through regeneration of older neighborhoods. The destruction of tenements and eviction of their low-income residents consistently created problems in nearby neighborhoods with "soft" real estate markets. Houses, apartments or other residential units are usually subsidized on a rent-geared-to-income (RGI) basis. Some communities have now embraced a mixed income, with both assisted and market rents, when allocating homes as they become available.