How big can a conservatory be without planning permission?

Wait... you don’t need planning permission?

That’s right, up to a certain size a conservatory, unlike an extension in most cases, requires no planning permission as it is classed as a temporary construction. Meaning no hassle whatsoever and no one in their right mind likes hassle.

Of course in order to be hassle free, you must stick to our 5 top rules;

  1. The conservatory must not take up more than half of the land surrounding the original building (meaning the original building prior to any other extensions).
  2. It must not be built any closer to a highway; this includes a public foot path.
  3. It must not be more than 3 metres on a semi-detached and 4 metres on a detached house from the original rear wall. Unless of course you’ve had a neighbour consultation in which case it can be anything between 3m-6m for a semi-detached and 4m-8m for a detached.
  4. The conservatory must be over 7 metres away from any boundaries adjacent the rear wall of the original house.
  5. If a new structural opening is built between the house and the conservatory planning permission is required, even if the conservatory itself is a completely exempt structure.

Sorry for babbling on; those are the core factors to take into consideration! Always contact your local authority before taking on a building project as each authority can vary their qualifying criteria.

You could be fined anything up to £5000, not only this; the extension could be torn down.

Stick to the Rules

We’re assuming you’d rather stay on the right side on the law, as most of us would.

In this case you certainly do. If these regulations are not abided by or your plea for planning permission was denied but you decide to go ahead with the build anyway, the consequences are not what you want to be receiving on top of the extension bill.

You could be fined anything up to £5000, not only this; the extension could be torn down. As extreme as that sounds, the local authorities do have the power to do so and will do whatever they think is necessary.


Aren’t Planning Permissions and Building Regulations the Same Thing?

In a word, no. Although both are the accountability of the Local Authority, they are fundamentally two completely different concepts.

Planning Permission considers the aesthetic outcome of an extension and it’s affect on the neighbourhood, whereas Building regulations outline how an extension must be structured in terms of thermal effectiveness, Water Board Authority’s approval and so on.

So there you go, that wasn’t so hard was it!

Good Company, Bad Company

Any good conservatory business, like lifestyle conservatories as a completely random example, will deal with the guidelines and the local authorities if necessary for you.

If you’re not sure whether you need planning permission it is best to contact the local authorities regarding staying within the guidelines, as they are very strict and like mentioned before in the article you don’t want to be receiving a £5000 fine.

Water you Talking About?

If your house just happens to be on top of a public sewer or within 3 metres of one you will have to receive permission from your water board authority in order to build there.

Even after permission is granted and the extension is installed, your local building control officer will have to inspect your conservatory to ensure no part of the sewer is damaged; if it is your structure could be taken down.

All our conservatories come with a 10-year, Insurance Backed Warranty