@nod is BC Building Control?
@DevilDamo I just looked at the plans and there is no mention of rendering of wall or even what type of wall it will be.
The application they have filed is
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Application to determine if prior approval is required for a proposed: Larger Home Extension
The Town and Country Planning (General Permitted Development) (England) Order 2015 (asamended) - Schedule 2, Part 1, Class A
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Should I ask the neighbour to add more details to the application? I'm not sure how this works