Check before changing the exterior
Listed buildings, conservation areas, Article 4 directions and conditions attached to previous permissions can all affect what is allowed. External wall insulation may also alter wall thickness, eaves and boundary relationships.
Practical approach
Check the property’s status and ask the relevant local planning authority when uncertain. Vale Render can discuss the physical project, but formal planning confirmation should come from the authority or an appropriately qualified adviser.
This page is general information, not legal or planning advice.