Here, any work you have done to the exterior of your property needs to have Planing Permission. If it's structural, then you have to have the calcs done and they also need to be checked by engineers employed by the local authority. If you live in a conservation area you can double the time this whole process takes to complete.
By the end, you've lost the will to live
I definitely put a lot of work into it, I had to have drawings prior to them even considering issuing the permit. Building codes are pretty strict but I went far above code.
I wish it was like that in the US, might discourage flipper assholes from existing. I hate them.
It's an issue everywhere, some lipstick and mascara and relist, nevermind the structural, thermal, plumbing, or electrical.