Listed buildings Scotland
When it comes to heritage properties, traditional sash and case windows are not only a defining architectural feature in many historic properties but also a focal point for conservation guidelines. Many properties in and around Edinburgh are listed buildings or located in conservation areas. Making it essential to understand how to properly upgrade sash and case windows while ensuring you are adhering to council guidelines.
What Are Listed Buildings?
Listed buildings are structures recognised for their unique architectural or historical significance and are safeguarded under the Planning (Listed Buildings and Conservation Areas) (Scotland) Act 1997. The lists of Buildings of Historic or Architectural Interest are compiled by Historic Scotland on behalf of Scottish Ministers.
There are three categories of listed buildings:
Category A – Buildings of national or international importance, either architectural or historic, or fine little-altered examples of some particular period, style, or building type.
Category B – Buildings of regional or more than local importance, or major examples of some particular period, style, or building type which may have been altered.
Category C – Buildings of local importance, lesser examples of any period, style, or building type, as originally constructed or moderately altered; and simple traditional buildings which group well with others in categories A and B.
Check if your property is listed
Why Heritage Sash And Case Windows Matter
Timber sash windows are a hallmark of British architecture from the 17th to the 19th centuries. These heritage sash and case windows often reflect the era of the building and are considered an integral part of its historic character.
Preserving these features is a key aspect of maintaining the authenticity of a listed building in Edinburgh and the surrounding areas.
Can You Replace Sash And Case Windows in a Listed Building?
The complete replacement of sash windows in a listed building requires Listed Building Consent. Approval is more likely to be granted if the windows are clearly deteriorated an or if it will improve your energy efficiency. We design the new sash and case windows to replicate the original windows, including materials, design, and opening method. To mimic the appearance of single glazing, we can provide heritage slimline double glazing units for improved thermal insulation. With heritage slimline double glazing you can go up to 16mm but this does need to be specified on your application.
The Role of Listed Building Consent
It is essential to apply for Listed Building Consent before undertaking any work on a listed building. Failing to do so could lead to legal consequences.
When submitting a application, it is advisable to consult with an architect, as there are several components that need to be addressed. At Eco Sash & Case, we collaborate with a local architect experienced in dealing with listed buildings and conservation area regulations. They can assist you with the application process, or you are welcome to appoint your own.
Below are just some of the documents you would need to provide:
- Detailed plans or technical drawings
- Photographs of the existing windows
- Justification for the proposed changes
- Information on materials and construction techniques
Refurbishments vs Replacements: Listed Buildings
If you are unsure whether your sash and case windows require refurbishment or a full replacement, Eco Sash & Case offers a free on-site survey to assess their condition. Our expert team will carefully evaluate your windows and provide clear recommendations based on their current condition and your goals.
Refurbishment Services
In many cases, your sash and case windows can be refurbished rather than replaced. Refurbishment has several advantages:
- No planning permission required – since we preserve the original windows, there are no alterations that require formal approval.
- Expert craftsmanship – our skilled joiners can address small repairs, draughts, and weighting issues.
- Extended lifespan – our refurbishment process can give your windows a whole new lease of life, maintaining their character and charm
Replacements and Upgrades
If you are considering upgrading to heritage double glazing, please note that this does require permission in most cases. Our team can advise you on the options available while ensuring any replacement meets your needs without compromising the historic integrity of your property.
At Eco Sash & Case, we regularly work with listed buildings and properties in conservation areas. We understand the regulations and have extensive experience ensuring compliance while enhancing the performance of your windows.
If you are unsure whether your building is listed or located in a conservation area, you can check your local council’s website. We are also happy to provide guidance and advice tailored to your specific property.
Get in Touch
If you would like expert advice or wish to schedule your free on-site survey, please contact us today. Our friendly team is ready to help you make the best decision for your sash and case windows, whether it’s refurbishment, replacement, or upgrading to heritage double glazing.
Contact us for a FREE quote

Author - Kate
Kate works with Eco Sash and Case, helping homeowners choose and maintain timber sash windows with a focus on sustainability and traditional craftsmanship.


