The Welsh Government has produced a technical guide, and a householder guide, available here, to help you understand how permitted development rules might apply to your circumstances.
Mae Llywodraeth Cymru wedi paratoi canllaw i ddeiliaid tai, sydd ar gael yma, i’ch helpu i ddeall yr hyn y sut y mae’r rheoliadau’n ei ddweud am faint yr antenâu a ganiateir a lle y dylid eu gosod.