A change of use occurs when replacing a glass roof for a solid insulated roof as it causes the structure to be classed as permanent rather than temporary.
Replacing conservatory roof with solid roof planning permission.
In 2010 the planning regulations changed to allow conservatories to have a solid roof without the need for planning permission.
This is because adding a solid roof to your conservatory changes its classification from a temporary structure to a permanent one.
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.
Replacing your conservatory roof shouldn t require building regulation approval so long as you are not blocking ladder access to a loft or roof extension window especially if it was designed as a fire escape for example.
The simple answer is no you do not planning permission to replace your conservatory roof with a solid tiled roof.
When replacing a translucent conservatory roof for a solid roof you must obtain building regulatory approval.
Replacing an old glass or polycarbonate conservatory roof with a new solid tiled roof does not require planning permission but it does require building regulatory approval.
Prior to this change in regulation the law stated that to be considered a conservatory 75 of the roof needed to be translucent in order for the building to be constructed without planning permission.
There are just some limits and conditions regarding placement and size which you can find details of on the government s planning portal.