Window Replacement in Conservation Areas

Sliding Sash Windows in Listed Buildings and Conservation Areas

Windows play a crucial role in the visual aspect of a building, especially if they have remained intact for generations. Original windows show distinctive mouldings, single putty glazing and characterful glass, making a statement of the relevance of listed buildings and conservation areas.

Georgian Sliding Sash Windows
Traditional Georgian Sliding Sash Windows in Conservation Area

However, over the years the windows will become draughty, malfunction and unsightly, and may require a total replacement. Even though this could be an opportunity for upgrading the windows for environmental and financial reasons, there is a common conflict between preserving the features of the original windows and improving maintenance requirements and thermal efficiency.

What about listed buildings?

Any internal or external alteration, extension or demolishing works in listed buildings require consent from the local authority planning department before proceeding. In these cases, the window replacement details must replicate the design and colour of the original ones.

Listed Buildings and Conservation Windows
Listed buildings have great architectural or historical importance

Undertaking unauthorised works to listed buildings is a criminal offence, and the owner of the property and any individual or professionals that have initiated the construction can be prosecuted. Also, an owner will find problems to sell a building with no consent for works undertaken.

Windows in Conservation Areas

If a building is not listed, but in a Conservation area, it might be necessary to obtain planning permission prior to replacing windows, doors, adding conservatories, porches or other extensions.

Traditional Window Replacement in Conservation Areas
Traditional Window Replacement and Upgrade in Conservation Area

The local authority or council will be able to verify if the building has any conservation requirements. Owners of properties that are granted Permitted Development Rights are allowed to make alterations without a council’s planning permission, ensuring the works are carried out according to the current European Building Regulations.

Upgrading to Double Glazed Windows

Planning and Conservation officers are very cautious regarding replacement with double glazed windows. However, it is important to note that repairing single glazing units for energy efficiency improvement is limited to:

  • Ineffective application of draught-proofing strips.
  • Curtains, blinds or shutters that are only effective during the night.
  • A secondary glazing, which can impact the reflection of the windows and the interior appearance, as well as present condensation and cleaning difficulties.

Cardinal Traditional Replacement Sash Windows

Cardinal traditional wooden sliding sash windows for Conservation areas can provide authentic proportions and designs, combining the latest technology in upgrading the levels of thermal and acoustic rates, as well as performance.

Traditional Sliding Sash Windows
Cardinal Traditional Wooden Sliding Sash

The standard Cardinal sash window is offered with Low-E and Argon gas double glazing, reaching U-values as low as 1.5W/m2K and extensive 10 years warranty.

Order Your Conservation Sash Window Today

Cardinal News

Excellent quality and very reliable lead times at a fair price. Would highly recommend Cardinal Windows to anyone looking for traditional styled windows.

- Dermot Long - Dublin

I ordered 15 sliding sash windows for my home refurbishment project and had my builder install the windows for me. I think I spent hours playing around with the different design options on the window builder! I absolutely love my new windows!

- Rachel Chalke - London