If you own a piece of land or building and it is currently being used for an activity – such as to run a business - you can apply for a statutory document which can prove if that use is legal.
Os ydych yn bwriadu defnyddio tir neu adeilad at weithgaredd, gallwch wneud cais am Dystysgrif Datblygu Cyfreithlon am ddefnydd neu ddatblygiad Arfaethedig (358kb PDF).