Do you need planning permission to build a conservatory in the UK

Published on 19 February 2024

Posted in Conservatory

Adding a modern conservatory to your home is a fantastic way to increase living space and bring the outdoors in. But before you start dreaming of sunny afternoons in your new space, it’s crucial to understand conservatory planning permission regulations. The question ” Do you need planning permission for a conservatory?” is common. This guide will walk you through everything you need to know about planning permission for conservatories in the UK.

Do Conservatories Need Planning Permission? Understanding Permitted Development Rights

Generally, many conservatory projects fall under “permitted development” rights. This means you can build without needing to apply for planning permission from your local council. However, this is subject to specific limits and conditions. So, do I need planning for a conservatory? Maybe not, but you need to be sure.

Key Factors: When Do You Need Planning Permission for Conservatories?

Several factors determine whether you need planning permission for conservatories. These primarily relate to the size and placement of the structure.

1. Size Restrictions: How large can a conservatory be without planning permission? The answer depends on your type of property. 

• For detached houses, the conservatory generally shouldn’t extend beyond 4 metres from the rear wall of the original house. 
• For semi-detached or terraced houses, this limit is typically 3 metres

• How big can a conservatory be without planning permission UK? : For a detached house, the biggest conservatory without planning permission is approximately 30 square metres, and 15 square metres for a semi-detached house.

2. Height Restrictions: The height of your conservatory is also a key consideration. Generally, the highest point of the conservatory shouldn’t exceed the highest part of your existing house’s roof. 

• If the conservatory is within 2 metres of a boundary, the maximum height is usually restricted to 3 metres.
• They cannot be taller than 4 metres high.

3. Coverage Restrictions: The conservatory shouldn’t cover more than 50% of the land around the original house. This includes any other outbuildings. 
4. Location on the Property: Planning permission for conservatories is more likely to be needed if the structure is at the front or side of your property. Conservatories at the rear are more likely to fall under permitted development.

Specific Planning Requirements for Conservatories

Here’s a more detailed breakdown of the planning requirements for conservatories:

• Single-Storey Structure: To qualify as a permitted development, the conservatory must be a single-storey structure.
• Limited Projection: The conservatory shouldn’t extend beyond the rear wall of the original house by more than 4 metres for detached houses or 3 metres for other types of houses.
• Side Extensions: If you’re building a conservatory on the side of your house, it shouldn’t be wider than half the width of the original house.
• Designated Land and Listed Buildings: If your property is on designated land (such as a National Park, Area of Outstanding Natural Beauty, or Conservation Area) or is a listed building, the rules apply differently. 
• Balconies and Verandas: Any design that includes a balcony, veranda, or raised platform will require planning permission. 

You will likely need to apply for planning permission, even if the conservatory meets the standard size and height restrictions. Conservation areas often have stricter regulations to preserve the area’s character. 

Neighbor Consultation Scheme

Even when adding a conservatory under permitted development, you must ensure it doesn’t negatively impact your neighbours. Neighbours will still be consulted and can raise objections to extensions under the ‘Neighbour Consultation Scheme’.

Building Regulations vs. Planning Permission

Aspect	Planning Permission	Building Regulations
Focus	Aesthetic impact and effect on surroundings.	Structural integrity, safety, and energy efficiency.
Key Considerations	Visual impact, adherence to local planning rules.	Ensuring the conservatory is safe, stable, and efficient.
Approval Needed?	Depends on size, location, and local guidelines.	Usually required, but there are exceptions.
Exemptions	N/A	Not required if: – The conservatory is mostly glazed. – It’s separated from the main house by external quality doors. – No new structural opening is created.
Always Required If	Large or impactful changes to the exterior.	A new structural opening is made between the house and the conservatory.

The Planning Application Process

If your conservatory project doesn’t fall under permitted development, you will need to go through the planning application process. Here’s a general overview:

1.  Check with Your Local Planning Authority: Contact your local council’s planning department to discuss your proposals and clarify any specific requirements. 

2.  Prepare Your Application: You will need detailed plans and drawings of your proposed conservatory, including its dimensions, materials, and location.

3. Submit Your Application: Submit your planning application to the local authority, usually through the government’s Planning Portal for England and Wales. There’s typically an application fee.

4. Decision: The local authority will review your application, considering factors like the impact on neighbours, the appearance of the conservatory, and compliance with local planning policies. They may consult with neighbours and other interested parties. 

5.  Appeal (If Necessary): If your application is refused, you have the right to appeal the decision. 

Solid Roof Conservatories: Do the Same Rules Apply?

A solid roof conservatory comes under the same rules that apply for planning permission as a glass roof. If the size and dimensions of your conservatory mean it is not classed as a permitted development, you still need to apply for planning permission.

Conservatories Near Boundaries: What to Consider

You can build your conservatory as close to a boundary as you like, as long as it’s under three metres in height. The rules state that if a conservatory is within two metres of a boundary, it must be less than three metres high.

If you plan to build it right up to the boundary, be aware of The Party Wall Act 1996. Under the act, you need to let your neighbour know in advance and get their approval.

Common Conservatory Styles and Planning Permission

Of all the various conservatory styles, it is rarely necessary to seek lean-to-conservatory planning permission. This is because of the size limits on this type of conservatory. The square footage and height of a lean-to-style conservatory would not normally be big enough to exceed the restrictions of the permitted development status.

What Happens If You Build Without Planning Permission?

If you need planning permission and you don’t get it before you build, the local council could serve you with an Enforcement Notice. This can mean a costly process involving retrospective applications and appeals. The council can even force you to remove your conservatory.

Getting Expert Help with Your Conservatory Project

Navigating the world of conservatory planning permission can feel overwhelming. Consider seeking advice from a conservatory specialist or a planning consultant. They can assess your property, advise on the planning requirements for conservatories, and help you with the planning application process if needed.

Key Takeaways

• Most conservatories fall under permitted development rights, meaning you might not need planning permission.
• Size, height, and location are crucial factors in determining whether you need planning permission.
• Planning requirements for conservatories are stricter for properties in conservation areas or listed buildings
• Building regulations are separate from planning permission and focus on safety and energy efficiency. 
• Always check with your local planning authority before starting any work.

By understanding the planning requirements for conservatories, you can ensure your building a conservatory project runs smoothly and avoids any potential legal issues. Take the time to research and plan carefully, and you will be enjoying your new living space in no time.

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Trust MG Windows for expert craftsmanship, choose from our wide range of conservatories, and a seamless experience from start to finish. Let’s create your perfect conservatory! Contact us today!

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