Guide to planning permissions for windows and doors
Navigating planning permissions for windows and doors can feel complex, particularly when dealing with period properties, conservation areas, or listed buildings. Drawing on our exceptional experience across various London boroughs and the boroughs in home counties beyond, this guide provides tailored insights to help you understand the rules and requirements.
While this guide offers a general overview, we always recommend consulting your local planning authority for specific guidance before making any alterations to your home.
Do you need planning permission to change your windows and doors?
The answer depends on your property type and location. The rules vary across four key categories:
- Houses and flats not in conservation areas or listed
- Houses in conservation areas, not listed
- Flats in conservation areas, not listed
- Listed buildings of all grades (houses, flats, and commercial properties)
Below, we explore the rules for each category in detail.
Category 1: Houses and flats NOT in conservation areas or listed
The quick answer:
- Houses: Planning permission is NOT required for replacing windows and doors.
- Flats: Planning permission is usually NOT required but is subject to local authority discretion.
For houses, replacing windows and doors is considered ‘permitted development’. However, all replacement windows and doors must comply with building control regulations, including thermal performance and safety standards. Choosing a FENSA-registered company, like Sashed, ensures your installation meets these requirements and is certified with your local authority.
For flats, planning permission is generally not required if the replacement windows are ‘like for like’ in materials and appearance (e.g., timber sash windows replaced with timber sash windows). However, flats do not benefit from permitted development rights, it is subject to your local authority’s policies, which may prohibit the use of uPVC in period properties. If you’re unsure, please contact us, and we will be happy to advise you on your local authorities’ specific policies.
Category 2: Houses in conservation areas (not listed)
The quick answer:
Planning permission is NOT required if the new windows and doors are ‘like for like’ in materials and appearance.
In conservation areas, properties often need to maintain their timeless aesthetic. For example, timber must be replaced with timber, and sliding sash windows must remain sliding sash windows. If your property falls under an Article 4 Direction, planning permission is required in all cases.
An Article 4 Direction removes permitted development rights, meaning that even ‘like for like’ replacements require a planning application. Applications are typically approved only when the replacements preserve the classic design and original materials.
Category 3: Flats in conservation areas (not listed)
The quick answer:
Planning permission is generally NOT required for ‘like for like’ replacements, but local authorities may have additional requirements.
Flats, maisonettes, and commercial properties do not technically benefit from permitted development rights. However, most local authorities allow window and door replacements without planning permission if they match the original design and materials.
If your flat is in a conservation area with an Article 4 Direction, all changes will require planning permission.
Category 4: Listed buildings of ALL grades
The quick answer:
Yes, planning permission and listed building consent are required for all changes.
Listed building regulations aim to protect our architectural heritage, and changes to windows or doors are carefully scrutinised. For Grade I and Grade II* listed properties, replacing windows with double glazing is typically difficult to get approved but not impossible. Depending on your property single glazing or heritage glazing is usually preferred by conservation officers.
Vacuum insulated glazing may be allowed for Grade II listed properties as a discreet, energy-efficient option that maintains the exquisite character of historic windows. Your local conservation officer will ultimately decide what is acceptable, so it’s essential to discuss your options with us before submitting an application.
Using double or vacuum insulated glazing in period properties
Unlisted period properties:
You can use double glazing without planning permission unless you live in a conservation area with an Article 4 Direction. Local conservation officers may prioritise maintaining the refined details of the original windows over modern energy efficiency, so it’s advisable to discuss your plans with us in advance.
Listed period properties:
For listed buildings, double glazing is typically restricted to ultra-thin vacuum insulated glazing, which preserves the timeless elegance of the original design while providing enhanced thermal performance. Each case is assessed individually, and the focus is on maintaining the property’s historic integrity.
Unsure about your property’s requirements?
Sashed is proud to specialise in timber-only solutions that honour the beauty and character of period properties. Our expert team can help you navigate the complexities of planning permissions, offering bespoke advice tailored to your property’s needs.
We also provide a comprehensive planning service, acting as your agent to manage the entire application process from start to finish. Explore our Planning Permission Services page to learn more.
Contact us
If you have questions about your windows or doors, call us on 020 3198 4472 or email [email protected]