For example, if two self contained flats in one property were converted into one family home, the number of additional units is zero as there has been a reduction in the number of affordable units.
Er enghraifft, os cafodd dau fflat hunangynhwysol o fewn un eiddo eu haddasu i greu un cartref teuluol, sero yw nifer yr unedau ychwanegol oherwydd bu lleihad yn nifer yr unedau fforddiadwy.