Replacement of windows in a listed building
The preferred approach for listed buildings is that the original windows are regularly maintained and repaired, over the long term, and only replaced if they are totally beyond repair. Any replacement of windows will require listed building consent, unless they are an exact replica of the original windows, in terms of their materials, appearance, pattern of glazing, timber moulding profiles, glazing type and style of opening, ie. you are replacing them "like for like".
We would generally expect any replacement windows to be a very close replica of the original windows in the building, generally formed from timber frames, with timber sashes or casements, and single glazing.
Repair of windows may not need consent. Should you wish to have further advice to see if your proposed works would need listed building consent, you can submit a list of proposed works, plans and elevations to the Council who will then provide an informal written opinion as to whether listed building consent is required. The fee for this service can be found here.
If you think that planning permission is required you may want a professional to act for you. We cannot recommend any particular professional agent but you could look on the Royal Town Planning Institute website. For additional guidance see 'Alterations to windows'
The following links set out good practice in the care and upgrading of historic windows.
You can find out if your property is a listed building here.
Do I need planning permission?