I have an IP that has a rear outdoor paved area of approx 4x2m. It has a wood frame for a verandah roof, it appears it may have had shade cloth covering it in the past. The frame is sturdy, 100x100 posts and significantly overengineered in my opinion. However there's no tin or laserlite roof. I wonder why. Can I simply hire a tradesperson to put laserlite and guttering, plumbing it into the nearest stormwater or do I need to go through council for a permit to put a roof on it?