Do you need planning permission for a conservatory?

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Adding a conservatory to your home is an excellent way of creating much-needed extra living space (and value) for your home.

But before you undertake any extension to your home, it is important to establish what you can and can’t build within the local planning rules.

Custom Hardwood Conservatory in Tunbridge Wells

Planning a conservatory can involve more than just planning the design.

But that’s where we come in! Our expert team is here to guide you every step of the way.

Build a conservatory without planning permission

Most conservatories fall under the same rules as single-storey extensions and are considered permitted development, and don’t need planning permission.

Generally, planning permission is not required when extending up to 6 metres for semi-detached/terraced houses and 8 metres for detached properties.

For more information, visit the planning portal.

When is planning permission required?

There are several factors as to why a conservatory may need planning permission:

  • Size - The conservatory takes up more than 50% of the land around the original house (which includes all sheds and outbuildings).
  • Position - The conservatory is positioned at the front or side of the original house that faces the road.
  • Eaves and ridge height - If the conservatory eaves and ridge height is over 3 metres, or if the height will be greater than the highest point of the roof on the existing house (single storey and two storey).
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Other factors which may require planning permission:

  • Listed building - If your conservatory is attached to a listed building, you will require a listed building consent.
  • Location - If your property falls under a designated or conservation area. Read more information here about Article 4

Applying for planning permission

In some cases, you may need to submit a planning application to your local authority before building a conservatory, which we can advise you on.

If you require planning permission, our experienced planning permission coordinators will take responsibility for any necessary applications. We will contact your local planning authority to apply for planning permission adhering to the local planning rules.

Custom PVC Orangery in East Sussex

This also applies to any building regulations applications.

We will keep you informed throughout the process and aim to make it as smooth as possible.

Building Regulation Approval

The good news is that a glazed structure, i.e. a conservatory, doesn’t usually require building regulations if it fulfils the following criteria:

  • It is under 30 square metres in size.
  • Has been built at ground level.
  • Has an external wall, windows or doors separating the conservatory from the original house.
  • A heating system that is independent of the original house.
  • All glazing and any electrical installation are compliant with the relevant building regulations.

You will require building regulation approval if:

  • Your conservatory is open plan style. This will mean proving your conservatory is as energy efficient as the rest of your house.
  • Any glazing replacement work.

Hallmark Conservatories

If you are thinking about adding a conservatory to your home, speak to our experienced team on 01323 671007 based in East Sussex; they will be able to advise you on the conservatory design and any planning and building regulations guidance.


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