text: Affordable Housing is sometimes referred to by gov't when they are approving a building project.  When a developer wants to build a mega something and the town needs more housing for the lower income population they will require "affordable housing units" to be built.  It is not uncommon to set aside a few units in luxury buildings as "affordable housing".  While regular rent could be $2000 per month, the units set aside for low income might be half that.\n\nThere would be a criteria which would vary from city to city or state to state as to what 'low income' is.  There is not a Federal standard.