Once you have begun developing your designs and have an idea about the type of elements you might want to include, you will need to identify whether planning permission is required.
Ar ôl dechrau dylunio eich dyluniau a chael syniad o’r math o elfennau y gallech fod am eu cynnwys, bydd angen ichi gael gwybod a oes angen caniatâd cynllunio.