Do you need planning permission for a conservatory?

Our 2023 conservatory planning permission guide

Adding a conservatory to your home can be an excellent way to create additional living space and bring more natural light into your surroundings. Before embarking on your conservatory project, it’s important to understand whether you need planning permission.

In this guide, we will explore the topic of planning permission for conservatories, providing you with valuable insights and guidelines.

At World of Windows, we have a team of experts who keep up to date with all planning permission and building regulations, so we can advise you to ensure you don’t make any costly mistakes.

Factors to take into account

Size and Placement

When it comes to conservatories, size and placement are crucial factors to consider. Permitted development guidelines often specify limitations on the proportion of the conservatory compared to the original property, the distance from boundaries, and the overall height. These restrictions aim to ensure that the conservatory does not significantly impact the surrounding environment or neighbouring properties.

You WILL need planning permission for ALL conservatories if:

  1. More than 50% of the land around the ‘original house’ is to be covered (this includes any other buildings)
  2. The extension is forward of the front or side of the ‘original house’ that faces onto a road
  3. The roof ridge or top point is higher than the highest point of the current roof.
  4. The eaves and ridge height are higher than the existing house (single-storey and two-storey)
  5. The eaves height is more than 4 metres OR more than 3 metres if within 2 metres of the boundary
  6. The work includes verandas, balconies or raised platforms

You WILL need planning permission for SIDE-POSITIONED conservatories if:

  1. It exceeds 4 metres in height or is more than single-storey
  2. It extends beyond half the width of the house.

You WILL need planning permission for REAR-POSITIONED conservatories if:

  1. Your extension plan extends beyond the rear of the ‘original house by over 6 metres (semi) or 8 metres (detached house)
  2. It exceeds 4 metres in height


The location of your property plays a role in determining whether planning permission is required for a conservatory. If your home is situated in a conservation area, an Area of Outstanding Natural Beauty, or any other designated area with special planning restrictions, it is more likely that you will need to obtain permission. These areas typically have stricter regulations to preserve the character and appearance of the surroundings.

Building Regulations

Even if planning permission is not necessary, it’s important to adhere to building regulations. Building regulations cover aspects such as structural integrity, energy efficiency, ventilation, and accessibility. It’s crucial to ensure that your conservatory meets these requirements to guarantee the safety and quality of the structure.

Seeking Professional Advice

Understanding the specific planning regulations in your area can be complex. To navigate the process smoothly, it is advisable to consult your local planning authority or seek professional advice from an architect or planning consultant. They can provide personalized guidance based on your location and circumstances, ensuring that you are fully informed and compliant with the necessary regulations.

Conservatory Installers

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How to proceed if I need one?

The responsibility to obtain planning permission needs to be done by you before you begin the building project. If a new conservatory doesn’t meet regulations, you might be ordered to demolish it at your expense.

World of Windows has created an easy step-by-step guide to help you go through your planning permission request and make sure you don’t forget anything:

1. Research Local Planning Guidelines

Start by researching the planning guidelines specific to your area. Check the website of your local planning authority or contact them directly to obtain the relevant information. Review any specific requirements, restrictions, or documentation needed for the planning permission application.

2. Engage an Architect or Planning Consultant

Consider hiring an architect or planning consultant with experience in handling planning permission applications. They can provide professional guidance, assess your project’s feasibility, and help you prepare the necessary documents. Their expertise can increase the likelihood of a successful application.

3. Prepare Documentation

Gather all the required documentation for the planning permission application. This typically includes detailed drawings or architectural plans of the proposed conservatory, site location plans, photographs, and any other supporting materials specified by the local planning authority. Your architect or planning consultant can assist you in preparing these documents.

We also recommend you check whether or not your building and contents insurances cover your new project.

4. Submit the Application

Once you have prepared the necessary documentation, submit the planning permission application to your local planning authority. Ensure that you include all the required forms, fees, and supporting materials as specified by the authority. You may be able to apply online, or you might need to do it in person at the local planning office.

5. Await a Decision

After applying, the local planning authority will review it and make a decision. The timeframe for a decision can vary depending on the complexity of the application and the workload of the authority. It’s important to be patient during this process.

6. Address any Queries or Modifications

The planning authority may have queries or requests for modifications to your application. If this happens, work closely with your architect or planning consultant to address any concerns and provide the necessary information or revised plans. Collaborating with the authority can help expedite the process and increase the chances of approval.

7. Receive the Decision

Once the local planning authority has made a decision, you will receive a written notification. If planning permission is granted, you can proceed with your conservatory project according to the approved plans. If permission is denied, you may have the option to appeal the decision or make necessary modifications to reapply.


Remember, the specific process and requirements for planning permission can vary depending on your location and local planning authority. It’s important to consult the relevant authorities or professionals to ensure compliance with the specific regulations applicable to your area. They can guide you through the process and help you navigate any challenges that may arise.


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