Sash Windows for Conservation Areas: A Guide to Planning Permission and Replacement Rules

In this article

Windows that are part of the tradition constitute an essential feature in numerous older buildings in London. The shape of windows and their timber construction can affect the appearance of a building to a great extent. This becomes important when choosing sash windows for conservation areas as it involves making modifications to the external appearance of a building.

Planning Permission for Sash Windows

Whether planning permission is needed will depend on the building and the nature of the works being carried out. Conservation area designation, permitted development rights and listed building designation may all play a part.

Those looking into planning permission for sash windows in a conservation area would be well-advised to examine the relevant planning requirements before removing any existing windows. The local planning authority is the correct body to seek guidance regarding planning permission.

Repair or Replacement: What Should You Consider?

• Repairing Existing Sash Windows

A worn sash window is not always doomed for replacement due to its draughty nature or rattling noise. Wooden windows can actually be repaired and made fully functional in case their constituent elements are still intact.

The repair of the existing structure will allow saving the original design features that might not be reproduced precisely otherwise. In accordance with the condition of the particular window, the repair works might cover tasks including damaged timber restoration, cord and pulley improvement, draught reduction or sympathetic reglazing.

• When Replacement May Be Appropriate

There could be cases where the window is beyond any reasonable level of decay and damage, rendering it unfeasible to restore. In this case, it might prove more beneficial to replace the window in order to achieve a better long-term solution that would keep the look of the property intact.

In choosing replacement sash windows for a conservation area, there are aspects of the original which should be taken into consideration. The number of glazing bars as well as their positioning can affect the outcome.

Conclusion

When planning to install sash windows in a conservation area as a homeowner, it is essential to plan as well as to have the right window type. By knowing the local regulations, seeing whether permission is required, and ensuring that the replacement is consistent with the character of the building, it will be possible to maintain the look of a period house even with some upgrades.

Frequently Asked Questions

Is it possible to change sash windows within a conservation area?

Replacement might be feasible, although depending on the building and the constraints it is subject to, there are some planning criteria involved. It is always better to verify it with the appropriate local planning authority prior to commencing works.

Are sash windows in a conservation area protected?

Although being located within a conservation area does not guarantee that each particular sash window will be protected, alterations to windows can be regulated since they can influence the overall appearance of the area.

Do I have to have planning permission for the new sash windows?

Probably not. It will depend on matters such as whether permitted development exists or other restrictions. In any case, the best course of action is to determine the situation before the windows are replaced.

Can I get double glazing for my windows in a conservation area?

It should be possible, although the design and look of the new windows should be considered. For older buildings, the glazing may need to be appropriate for the existing style.

Is it better to repair or replace my old sash windows?

It will depend on their condition. If the wood and other components of the window are still in good enough condition, then repair may be a better way to go.