to estimate what is known as ‘bridging’; that is where an individual is buying a property as a new main residence where they’ve not yet sold their previous main residence at the time of purchase
Hynny yw, lle mae unigolyn yn prynu eiddo fel prif breswylfa newydd ond nad yw wedi gwerthu ei brif breswylfa flaenorol eto ar yr adeg prynu