Before replacing your windows, check with your local planning office if any of the following apply to your property:
- you live in a conservation area
- you have an article 4 direction on your property, removing the right of permitted development
- you live in a listed building
Most people have double or triple glazing fitted by a professional. Competent DIYers can fit some secondary glazing systems, but a professional should carry out removing old windows and installing new ones.