In the 16 local authorities where demolitions were carried out, the highest numbers were in Caerphilly (26), Gwyneddd (17), Powys (12) and Flintshire (11).
Yn yr 16 o awdurdodau lleol lle dymchwelwyd anheddau, roedd y niferoedd uchaf yng Nghaerffili (26), Gwyneddd (17), Powys (12) a Sir y Fflint (11).