English: newly let dwelling
Welsh: annedd a osodir am y tro cyntaf
Subject: Tai
Welsh definition: Newly let dwellings are those which have not been let to a tenant at any time during the six months prior to the coming into force of this section. 
Plural: anheddau a osodir am y tro cyntaf
Notes: Mae’r term hwn yn gysylltiedig â’r term ‘new supply dwelling’.