Orangeries are usually permitted development — but with strict size limits
Most domestic orangeries in England can be built without a full planning application, provided they meet the rules set out in the Town and Country Planning (General Permitted Development) Order 2015 (as amended). These rules are known as permitted development rights.
Most orangeries do not need planning permission if they meet permitted development limits: up to 3m depth (terraced) or 4m (semi-detached/detached), eaves height under 3m, and total height under 4m. Check your property type and land coverage first.
- Check maximum depth: 3m terraced, 4m semi-detached or detached.
- Ensure eaves height stays under 3 metres.
- Total height must not exceed 4 metres for dual-pitched roof.
- Orangery floor area plus other extensions must stay under 50% of original house land.
- No permitted development rights for flats, maisonettes, or listed buildings.
- Orangeries are usually permitted development — but with strict size limits
- Planning permission is required when your orangery exceeds permitted development limits
- The three key measurements that determine if you need planning permission for an orangery
- Quick numbers — permitted development limits for orangeries in England
- You need planning permission for an orangery if your property is in a restricted area
- The direct answer you do not need planning permission for a standard orangery under 4 metres deep
- How to verify your installer and confirm permitted development status
Permitted development allows you to add an orangery up to certain dimensions without applying for planning permission. The rules cover maximum depth, height, and how much of your garden the orangery can occupy. The limits depend on your property type and whether you live in a restricted area.
For England, the maximum depth for an attached single-storey orangery is 3 metres for a terraced house, and 4 metres for a semi-detached or detached house (GOV.UK, 2026). The eaves height must not exceed 3 metres, and the total height must not exceed 4 metres for a dual-pitched roof. The floor area of the orangery, combined with any other extensions, must not cover more than 50% of the land around the original house.
Planning permission is required when your orangery exceeds permitted development limits
If your orangery exceeds any of the permitted development dimensions, you must submit a full householder planning application to your local planning authority. The same applies if the orangery is at the front of your property — side extensions are allowed under certain conditions, but front extensions are not (Planning Portal, 2026).
Properties in conservation areas, Areas of Outstanding Natural Beauty (AONBs), National Parks, or World Heritage Sites face stricter rules. Permitted development rights are more limited in these areas. Listed buildings require listed building consent regardless of size, and planning permission may also be needed. Flats and maisonettes have no permitted development rights at all — planning permission is always required.
The three key measurements that determine if you need planning permission for an orangery
Three measurements decide whether your orangery falls under permitted development or needs planning permission. These are height, depth, and coverage of your land.
Height. The maximum eaves height is 3 metres. The maximum overall height is 4 metres for a dual-pitched roof, or 3 metres for a flat roof (Planning Portal technical guidance, GOV.UK, 2026).
Depth. For terraced houses, the maximum depth is 3 metres. For semi-detached and detached houses, the maximum depth is 4 metres. These measurements apply to single-storey orangeries only. Two-storey orangeries are not covered by permitted development.
Coverage. The orangery plus all other extensions must not cover more than 50% of the total curtilage — the land around the original house as it stood on 1 July 1948 (or when it was built if later).
Quick numbers — permitted development limits for orangeries in England
| Property type | Max depth (single-storey) | Max eaves height | Max total height | Max coverage of curtilage |
|---|---|---|---|---|
| Terraced house | 3 metres | 3 metres | 4 metres | 50% |
| Semi-detached house | 4 metres | 3 metres | 4 metres | 50% |
| Detached house | 4 metres | 3 metres | 4 metres | 50% |
| Conservation area / AONB / National Park | 1 metre (rear) | 3 metres | 4 metres | 50% |
Source: GOV.UK, 2026 and Planning Portal, 2026.
You need planning permission for an orangery if your property is in a restricted area
If your property is in a conservation area, permitted development only allows rear extensions up to 1 metre depth. Side extensions are not allowed at all (Historic England, 2026).
Areas of Outstanding Natural Beauty (AONBs) and National Parks have the same restrictions as conservation areas for extensions over 20 cubic metres. Some local councils have also imposed Article 4 directions, which remove permitted development rights for specific streets or neighbourhoods. You should check your local planning authority website to see if any such directions apply in your area.
Flats and maisonettes have no permitted development rights. Planning permission is always required for any orangery added to a flat or maisonette.
The direct answer you do not need planning permission for a standard orangery under 4 metres deep
For a typical detached or semi-detached house, an orangery up to 4 metres deep at the rear, single-storey, with eaves under 3 metres and total height under 4 metres, does not require planning permission (Planning Portal, GOV.UK, 2026).
This assumes the orangery is not at the front of the house, does not exceed 50% curtilage coverage, and the property is not in a restricted area such as a conservation area. Permitted development rights apply to the “original house” as it stood on 1 July 1948, or when the house was built if later. If you have already added extensions, those count towards the 50% coverage limit.
Importantly, planning permission and building regulations are separate. Even if you do not need planning permission, you still need building regulations approval for structural work, glazing, and energy performance. building regulations for orangery UK
How to verify your installer and confirm permitted development status
If your orangery includes solar panels or a heat pump for energy efficiency, check that your installer holds MCS certification (MCS register, 2026). For structural work, ensure the installer is registered with TrustMark, the government-endorsed quality scheme. For glazing and doors, FENSA or CERTASS certification is required to comply with building regulations.
If you want formal confirmation that planning permission is not needed, you can apply for a Lawful Development Certificate from your local planning authority. This costs approximately £103 to £206 depending on the type of certificate (2026 fees, GOV.UK). The certificate provides legal proof that your orangery is permitted development, which can be useful when selling your home.
Always check your local authority’s planning portal for any Article 4 directions that remove permitted development rights in your area. how to check Article 4 directions for your property
Frequently Asked Questions
In most cases, no. Permitted development rights allow a single-storey orangery up to 3 metres depth (terraced) or 4 metres (semi-detached/detached), with a maximum eaves height of 3 metres and total height of 4 metres, as set by the Town and Country Planning (General Permitted Development) Order 2015 (GOV.UK, 2026).
You can build an orangery up to 3 metres deep for a terraced house, or 4 metres deep for a semi-detached or detached house, with eaves no higher than 3 metres and total height no more than 4 metres for a dual-pitched roof (Planning Portal, 2026).
No. Permitted development rights do not cover front extensions. Any orangery at the front of your property requires a full planning application (Planning Portal, 2026).
Yes, stricter rules apply. Permitted development rights are more limited in conservation areas, Areas of Outstanding Natural Beauty, National Parks, and World Heritage Sites (GOV.UK, 2026). You will likely need planning permission.
Yes. Listed buildings always require listed building consent regardless of size, and planning permission may also be needed (Planning Portal, 2026).
