Transparent Transformation: Navigating Planning Permission for Double Glazed Windows

As a homeowner, understanding the ins and outs of planning permission can feel like navigating a labyrinth. This is especially true when it comes to double glazed windows, which are an essential feature for modern, energy-efficient homes. Luckily, our team of Architectural Designers at Shear Architectural Design are here to help you through the process. In this blog post, we’ll explore common questions related to planning permission for double glazed windows, and delve into the services we offer to make your window replacement journey as smooth as possible.

Do You Need Planning Permission for Double Glazed Windows?

The Basics of Planning Permission

One of the most common questions we receive is whether planning permission is needed for double glazed windows. Sometimes, double glazed window installations fall under permitted development rights, meaning that planning permission is not always required. However, there are exceptions to this rule. For instance, if your property is a listed building or located within a conservation area, you may need to obtain consent from your local planning authority.

If you are creating a new bay window then that requires planning permission.

Flats do not have Permitted Development rights so will always require planning permission.

Navigating Planning Permission Exceptions

If you’re unsure whether your property falls under any of these categories, it’s always best to consult with your local councillor or get in touch with our team of Architectural Designers for guidance. We can help you navigate the planning portal and determine whether you’ll need to apply for planning permission.

Understanding Double Glazed Windows and Their Benefits

The Science Behind Double Glazing

Double glazed windows consist of two double glazing panes separated by a layer of insulating gas. This innovative design reduces heat transfer and minimises the risk of condensation, keeping your home warm and comfortable throughout the year.


Do You Need Planning Permission for Double Glazed Windows?

Permitted Development Rights

In some cases, homeowners can install or replace double glazed windows without the need for planning permission, as these improvements sometimes fall under permitted development rights. However, there are certain situations where you may need to seek planning permission.

Listed Buildings and Conservation Areas

For example, if you live in a listed building or a property located within a conservation area, there are additional restrictions to consider. In these cases, you may need to obtain planning permission to change timber windows to UPVC or install double glazing. You can find out more about planning permission for listed buildings HERE.

Building Regulations

When it comes to building regulations, replacing double glazed windows usually requires compliance with building regs, which ensure the new windows meet energy efficiency and safety standards. For more information on building regulations, check out our post on the latest changes in building regulations.

Certificates and Compliance

When installing or replacing double glazed windows, you will need a FENSA certificate or a certificate from a similar competent person scheme. These certificates demonstrate that the work has been carried out in compliance with building regulations. Selling a house without a FENSA certificate is possible, but it may require you to obtain retrospective planning permission or an indemnity insurance policy.

Double Glazed Windows: FAQs

Now that we’ve covered the basics of planning permission for double glazed windows, let’s address some specific questions homeowners often have:

Why do my double glazed windows steam up on the outside?

People often ask “Why is there condensation on the outside of my double glazed windows?”. This is a sign that your windows are doing their job! Double glazing is designed to reduce heat transfer, so the outer pane may be cooler than the surrounding air, causing condensation to form on the outside. This is particularly common during colder months. This is due to the reduced heat transfer of double glazing. If you are concerned about condensation issues, read our post on designing for comfort and health.

How much do double glazed windows cost?

The cost of double glazed windows varies depending on factors such as size, materials, and installation. For a rough estimate, you can use our double glazed windows cost calculator.


Further Reading

For more information on double glazed windows and how they relate to planning permission, you may want to explore the following resource:


In conclusion, double glazed windows sometimes do not require planning permission under permitted development rights. However, special cases, such as listed buildings and properties in conservation areas, may necessitate planning permission. It’s essential to ensure your new windows comply with building regulations and obtain a FENSA certificate or similar to avoid complications when selling your home.

For expert advice on planning permission and building regulations for your home improvement project, get in touch with Shear Architectural Design. Our experienced team can help guide you through the process to ensure a smooth and successful outcome.

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Remember, when it comes to your building project, an informed decision is the best decision.



As always, thanks for reading!

DISCLAIMER: This blog post is intended to provide a general understanding of the subject matter. It is not intended to provide specific advice for any specific circumstances. Always consult with a professional before starting any construction work.

At Shear Architectural Design, we pride ourselves on providing top-notch Architectural Design services to cater to your every need. Whether you require a building Architectural Designer to design a house plan or expert assistance with Architectural Design drawings, our team is here to help. Our Architectural Design process ensures a smooth experience from start to finish, and we make sure to cover every aspect, including building regulation plans and guidance on building regulations and planning permission. With a wealth of Architectural ideas, we’re adept at creating the perfect solution for your unique requirements. So, if you’re ready to draw a house design or embark on a planning design journey, trust us to bring your vision to life.

Throughout our blog, ingenuity is mentioned a tiny amount, but it’s important to emphasise that it plays a significant role in the architectural design world. Innovative solutions and creative thinking are at the core of every successful project. By combining expertise, experience, and ingenuity, our Architectural Design team is able to overcome challenges and deliver exceptional results that truly stand the test of time.



Related Posts

For further reading and guidance on home improvements, planning permission, and architectural design, we recommend these related blog posts:

  1. What to Know About Building Regulations for Loft Conversions
  2. Garden Buildings and Planning Permission: What You Need to Know
  3. Energy Efficiency and Home Renovations: Tips for a Sustainable Home Makeover
  4. How to Maximise Natural Light in Your Home Extension
  5. The Benefits of Biophilic Design in Modern Home Architecture

As you embark on your double glazed window installation or other home improvement projects, it’s crucial to remember that every property is unique. Therefore, it’s always a good idea to consult with a professional Architectural Designer to ensure your project complies with all relevant rules and regulations.

If you require assistance with planning permission, building regulations, or any aspect of architectural design for your home, feel free to contact Shear Architectural Design today. Our team of experienced professionals is ready to help you navigate the complexities of planning permission and building regulations, ensuring a successful outcome for your home improvement project.

Keep exploring our blog for more tips, advice, and updates on architectural design and planning permission in the UK.


At Shear Architectural Design, we’re passionate about helping our clients bring their vision to life. From gaining planning permission to providing expert advice on design and materials, our team is here to support you every step of the way. Explore our portfolio for more inspiration and get in touch with us to start your journey towards your dream outdoor space today.

Working with an Architectural Designer can help you to achieve your goals and ensure that your project is a success. Shear Architectural Design is a reliable and experienced company that can help you with your home renovation, building project or garden project, in Sussex.

Our Services

At Shear Architectural Design, we offer a range of services to help you bring your Passive House vision to life:

We assist with gaining planning permission and building regulations, ensuring that your project meets all necessary requirements.

Contact us today, on 01273 740642 to learn more about how we can help you create the home of your dreams!

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