An extension or addition to your house is considered to be permitted development, not requiring an application for planning permission, subject to limits and conditions.
Bernir bod estyniad neu ychwanegiad i’ch tŷ yn waith datblygu a ganiateir, nad oes angen cais am ganiatâd cynllunio ar ei gyfer, cyhyd â’i fod yn cydymffurfio ag amodau a therfynau.