Do You Need Planning Permission For A New Solid Roof On My Conservatory? November 27, 2019 Most new‐build conservatories with either a solid, tiled or glazed roof will not need planning permission, because they are covered under what is known as a ‘permitted development’. There are just some limits and conditions regarding placement and size, which you can find details of on the Government’s Planning Portal.Building Regulations will apply if you want to build an extension on your home, but not for a conservatory, if certain conditions are met. In order for your conservatory to be classed as a conservatory and not an extension, it will have to be separated from the main house with external quality walls and/or windows and doors that meet Building Regulation requirements. It will also need to have an independent heating system that has separate on/off and temperature controls to the main house’s heating system.If these measures are not in place, the conservatory is technically an extension and separate Building Regulations apply. Even when your conservatory is built in‐line with these conditions, the doors, windows and glazing and any electrical work will have to adhere to specific Building Regulations.