Mae Deddf Tai (Cymru) 2014, a gafodd Gydsyniad Brenhinol ar 17 Medi 2014, yn cynnwys darpariaethau sy’n rhoi’r pwerau dewisol i Awdurdodau Lleol i godi premiwm o hyd at 100% o raddfa safonol y Dreth Gyngor ar gartrefi gwag hirdymor ac ail gartrefi yn eu hardaloedd. Bydd Awdurdodau Lleol yn gallu penderfynu codi’r premiwm hwn o 1 Ebrill 2017 ymlaen.
The Housing (Wales) Act 2014 which received Royal Assent on 17 September 2014, contains provisions giving Local Authorities the discretionary power to levy premiums of up to 100% of the standard rate of Council Tax on long-term empty homes and second homes in their areas.   Local Authorities will be able to decide to charge these premiums from 1 April 2017.