Mae eithriad rhag y premiwm ar gyfer cartrefi tymhorol neu lety gwyliau lle y gwaherddir y rhain rhag cael eu meddiannu drwy gydol y flwyddyn neu'n barhaol. Mae'r eithriad hwn yn gymwys yn aml i gartrefi gwyliau a chabanau gwyliau pwrpasol sy'n ddarostyngedig i amodau cynllunio sy'n cyfyngu ar feddiannaeth drwy gydol y flwyddyn. O 1 Ebrill 2023, mae'r eithriad Dosbarth 6 wedi'i ymestyn i gynnwys pob annedd a gyfyngir gan amod cynllunio sy'n eu hatal rhag cael eu meddiannu am gyfnod parhaus o 28 diwrnod o leiaf mewn unrhyw gyfnod o flwyddyn; sy'n pennu eu defnydd fel llety gwyliau unig; sy'n eu hatal rhag cael eu meddiannu fel unig neu brif breswylfa unigolyn.
There is an exception from the premium for seasonal homes or holiday lets where year-round or permanent occupation is prohibited. This exception often applies to purpose-built holiday homes and chalets which are subject to planning conditions restricting year-round occupancy. From 1 April 2023, the Class 6 exception has been extended to include every dwelling restricted by a planning condition which prevents occupancy for a continuous period of at least 28 days in any one-year period; specifies its use as a holiday let only; prevents occupancy as a person’s sole or main residence.