No installer comparison site has bothered to compile this: conservation area coverage and Article 4 planning directions, checked council by council, for every borough below. It's the difference between "solar is permitted development" as a generic claim, and knowing whether that's actually true on your specific street.
Conservation area counts and Article 4 coverage side by side — from 2 restricted areas in Hounslow to 40 in Islington.
Open the comparison table →Some neighbourhoods differ enough from their borough that borough-level advice isn't much use. Where that's true, we write the area up separately.