They may extend from the side elevation of the original dwellinghouse by no more than 3 metres and must be set back from the principal elevation of the original dwellinghouse by at least 1 metre.
Ni chânt ymestyn am fwy na 3 metr o ochr y tŷ annedd gwreiddiol a rhaid iddynt gael eu gosod o leiaf 1 metr yn ôl o brif ochr yr annedd gwreiddiol.