Yn olaf, bydd y Bil yn caniatáu i awdurdodau lleol godi treth gyngor safonol o 150% ar eiddo sy’n wag am 12 mis neu fwy, os dyna’u dewis.  Amcan hynny yw gwneud y defnydd gorau posibl o dai trwy sbarduno eu defnyddio.  O ganlyniad, bydd yn helpu i fynd i’r afael â phroblemau lleol yn y cyflenwad tai yn ogystal â thaclo problemau eraill y gall tai gwag eu hachosi, fel fandaliaeth a mathau eraill o ymddygiad gwrthgymdeithasol.
Finally, the legislation will allow local authorities to charge a flat 150% of the standard council tax charge on properties that are empty for 12 months or longer, should they chose to do so.  The aim of this is to help make the best possible use of existing homes by bringing them back into use.  As a result, it will help to address local problems in housing supply as well as tackling the other problems that can be caused by empty homes, such as vandalism and other forms of anti-social behaviour.