One of the most frequently asked questions we get here at Conservatory Land is about whether our customers need Planning Permission to undertake their DIY Conservatory project.
Thankfully, the quick answer is likely to be no.
You will not need to obtain planning permission in order to build a DIY conservatory most of the time.
This is because they are considered to be ‘permitted development’. However, in order to qualify for this status, the requirements below will need to be met.
Conservatory Planning Permission is not required if…
The conservatory does not extend beyond the side wall of the house
You must make sure that the edges of your conservatory do not go beyond the side of the house. The side wall of your conservatory can be in line with the side wall of your property, but must not go beyond that – even by a small amount.
The conservatory does not take up more than 50% of the land area around the ‘original house’*
How much land do you own as part of your property, which is not actually covered by the house itself? Think about your front and back gardens, as well as any side passages. Add up the total area amount, and then make sure your conservatory and/or other buildings do not cover more than half of this. For example: if the area equals 20m2, your conservatory together with any other buildings cannot exceed 10m2.
*Please note, the term ‘original house’ refers to the state of the house when it was first built, or exactly how it stood on July 1st 1948.
The conservatory is not higher than the original roof of the home
This is pretty self-explanatory, your conservatory cannot be taller than your home. This isn’t likely to be the case anyway for a typical property. But if you were to live in a single-storey home (such as a bungalow), then it’s best to make sure you don’t get an overly-large extension that may break regulations.
The conservatory is not forward of the principal elevation, or side elevation, fronting a highway
This sounds confusing, but is pretty straight forward and not something you need to worry about. It means that if you have a conservatory on the front or side of your home, then it cannot be closer to a public highway (basically a footpath or road) than your home is.
The conservatory is a single-storey rear extension that does not exceed four metres in height
This is pretty self-explanatory. We already know that a conservatory cannot be taller than the roof of the home, but it also cannot be taller than four metres. Four metres is really quite tall, so this shouldn’t really pose an issue to you.
The conservatory is a single-storey rear extension that does not exceed three metres in depth for an attached house, and four metres in depth for a detached house
From the wall of your home outwards, the conservatory cannot exceed three metres if you live in a terraced or semi-detached house. Basically, if another house is part of the same structure as yours. If your home is detached – i.e. yours is the only home present in the structure – then the limit is more generous at four metres.
The conservatory is a side extensions that is single storey – and does not exceed four metres in height, or a width of more than half of the ‘original house’
Side extensions are quite rare, but if you do want one, then it cannot be taller than four metres. In terms of width, you need to figure out the width of the original house, and half it. Your extension cannot exceed that figure. For example, if the original house is six metres wide, the side extension cannot exceed three metres in width.
The eaves and ridge height of a conservatory are not higher than that of the house
We already know from rule number three that a conservatory cannot exceed the height of the house. This rule adds that the eaves and ridges also cannot exceed. Again, this is unlikely to happen – but if you live in a single-storey home it’s best to make sure.
The eaves within two metres of the boundary do not exceed three metres in height
This means that any conservatory within two metres of the edge of your property – i.e. where the land you own ends – cannot have eaves higher than three metres, from the lowest point on the ground.
The extension does not include balconies, raised platforms or verandas
With Conservatory Land, you won’t have this problem. Unless requested, we don’t normally manufacture conservatories that include any of these features. If you wish to add them, you will need planning permission.
A roof pitch on conservatories higher than one storey must match existing house
The roof pitch of a house is the measurement of the roof’s steepness. The roof pitch of a conservatory must match that of the house, if the conservatory is taller than one storey.
Planning permission for Orangeries
Please read our blog about Orangery Planning Permissions
These are the house extension planning permission requirements you have to meet.
If you expect to be in violation of any of these rules, then don’t worry too much. It doesn’t mean you can’t build a conservatory – you just need to get the necessary permission.
How big can you build a conservatory without planning permission?
So, what size of extension is exempt from planning?
As noted above, the general height restrictions are in relation to the size of your property.
The larger and wider your home, the bigger your conservatory can be.
However, there are a couple of absolute limitations – as quoted from the aforementioned guidelines:
A single-storey rear extension cannot exceed four metres in height.
A single-storey rear extension cannot exceed three metres in depth for an attached house, and four metres in depth for a detached house.
A single storey side extension cannot exceed four metres in height, or a width of more than half of the ‘original house’.
How much does it cost to get planning permission in the UK?
Planning regulations for conservatories require you to make an application.
This costs £172 in England, and £166 in Wales.
If you do wish to seek Planning Permission, you should have an answer back within eight weeks of submitting your application.
In certain circumstances, however, it could take up to 13 weeks.
As we’ve said, it is highly unlikely that you will need any planning permission at all in order to build your conservatory.
But it’s always a good idea to check.
Here at Conservatory Land, we’ll manufacture a DIY conservatory that is the perfect size for you. We will take all building restrictions into account when doing this.
If you’d like to learn more, don’t hesitate to contact us on 0800 952 8000 or click here for a free brochure. We are always happy to help in any way we can.