Class 1 – dwellings being marketed for sale or where an offer to buy the dwelling has been accepted - this exception is time-limited for one year - see further details.
Dosbarth 2 - anheddau sydd ar y farchnad i gael eu rhentu neu sydd â chynnig i'w rhentu wedi cael ei dderbyn - mae'r eithriad hwn wedi'i gyfyngu i 1 flwyddyn - gweler rhagor o fanylion.