From 1 April 2018, LTT replaced Stamp Duty Land Tax (SDLT) on residential and non-residential property and land interests purchased in Wales.
Ar 1 Ebrill 2018, cafodd Treth Dir y Dreth Stamp ei disodli gan y Dreth Trafodiadau Tir ar eiddo preswyl ac amhreswyl a buddiannau tir sy’n cael ei brynu yng Nghymru.