Outside or inside? Either way it's nice to build your dragon a nice area to run around in of course! You don't give a lot of info, but in general I would say great idea as long as you make sure your dragon can't hurt himself by getting stuck in wire mesh, fall off great heights or escape through holes or digging. When outside also pay attention to restricting access for predators (cats/dogs/wildlife/kids.. :lol: ) and prey animals (bugs with parasites) and a place to get out of the hot sun if needed.