> For listed buildings, you've got to get permission Sure - it's the same in our country, with the additional trouble that there is a special institution that

> For listed buildings, you've got to get permission Sure - it's the same in our country, with the additional trouble that there is a special institution that has to approve any changes in protected buildings and they are pretty harsh. And even then lots of them get updated. > Blocks of flats have the additional problem that it's unlikely every owner will have the cash to replace their windows at the same time. We have that too and what usually happens with changes that apply to the whole building (like the whole facade) is that the community of the owners finances changes like that with a credit on the whole building, there are special laws for that. Happens less often with just the windows because they are so cheap most people can afford them on their own.