At the 2017 revaluation, a lower rate was applied for educational, healthcare, defence and public convenience hereditaments, while the standard rate applied to all other properties.
Ar adeg ailbrisiad 2017, cymhwyswyd cyfradd is ar gyfer hereditamentau cyfleusterau cyhoeddus, amddiffyn, gofal iechyd ac addysgol, tra bod y gyfradd safonol yn berthnasol i’r holl eiddo eraill.