The short answer
Yes — many orangeries can be built without planning permission under permitted development, provided they stay within the size, height and footprint limits and the property is not on designated or restricted land. To qualify, an orangery generally needs to be a single-storey rear addition within the depth and height limits, not extend forward of the main elevation facing a road, not cover too much of the garden, and use materials in keeping with the house. Permitted development does not apply to flats and maisonettes, is often restricted in conservation areas and on listed buildings, and can be removed by an Article 4 direction or a planning condition. Always confirm with your local planning authority. See planning permission for an orangery for the full picture.
Permitted development rights are what allow many homeowners to add an orangery without a planning application, but the rights come with conditions and exceptions. This guide sets out the typical conditions an orangery must meet, the situations where the rights do not apply, and the sensible checks to make first. It is general information based on national guidance; the rules vary across the UK and your local planning authority is the definitive source.
Building without permission at a glance
- Single-storey rear Within depth limits
- Height Within the set limits
- Garden coverage Not over the proportion limit
- Not forward of The principal elevation
- Excluded Flats, maisonettes
- Restricted Conservation areas, listed buildings
The permitted development conditions
To be built without planning permission, an orangery generally has to satisfy the permitted development conditions that apply to single-storey rear extensions. In broad terms that means it is at the rear rather than forward of the principal elevation facing a road, it stays within the depth limit measured from the original rear wall, it is within the overall and eaves height limits (with tighter limits close to a boundary), it does not cover more than the permitted proportion of the garden, and the materials are similar in appearance to the existing house. The precise figures are set nationally and updated from time to time, so the Planning Portal and your local authority are the definitive sources for the limits that apply to you.
| Condition | Typical requirement |
|---|---|
| Position | Rear, not forward of the principal elevation |
| Storeys | Single storey |
| Depth | Within the rear-extension depth limit |
| Height | Within overall and eaves height limits |
| Garden | Not over the permitted proportion covered |
| Materials | Similar in appearance to the house |
When permitted development does not apply
The rights are not universal. They do not apply to flats and maisonettes, so an orangery there usually needs a planning application. They are commonly restricted in conservation areas, National Parks and Areas of Outstanding Natural Beauty, and listed buildings normally require listed building consent. A local Article 4 direction can remove permitted development rights for a street or area, and a condition on the original planning permission can do the same for an individual property — this is common on newer estates. If any of these apply, an orangery is likely to need permission even if it would otherwise be within the limits.
Don’t forget building regulations
Building an orangery without planning permission does not mean it is free of all control. Building regulations are separate, and may still apply depending on the orangery’s glazing ratio, floor area and whether it is separated from the house by external-quality doors. The glazing is notifiable work in any case and should be fitted by a FENSA or CERTASS registered installer. So an orangery can be permitted development for planning purposes while still needing building regulations sign-off — check both. See building regulations for an orangery. This is general information, not advice for your specific property; the rules vary and your local planning authority is the definitive source.
Compare orangery quotes
A registered orangery specialist can confirm whether your build is permitted development and advise on building regulations. Use our service to compare quotes from specialists in your area.
Frequently asked questions
Can I build an orangery without planning permission?
Often, yes. Many single-storey rear orangeries are permitted development and need no application if they stay within the size, height and footprint limits and the property is not on restricted land. Flats, maisonettes, conservation areas and listed buildings are exceptions. Always confirm with your local planning authority.
What size orangery can I build without permission?
It must stay within the permitted development limits for single-storey rear extensions — covering depth from the original rear wall, overall and eaves height, and the proportion of garden covered. The exact figures are set nationally and updated periodically, so check the Planning Portal or your local authority for the current limits.
Does permitted development apply to flats?
No. Permitted development rights for extensions and orangeries apply to houses, not flats or maisonettes, so an orangery for a flat normally needs a planning application.
If I don't need planning permission, do I still need building regulations?
Possibly. Building regulations are separate and may still apply depending on the orangery’s glazing ratio, floor area and separation from the house. The glazing is notifiable regardless. See building regulations for an orangery.
Sources & further reading
- Planning Portal — permitted development for extensions, conservatories and orangeries
- GOV.UK — permitted development rights, Article 4 directions and Lawful Development Certificates
- GOV.UK / Building Regulations Approved Documents — standards for extensions and glazed structures
- Glass and Glazing Federation (GGF) — consumer guidance on orangeries and planning
This is general information, not advice for your specific property, and the rules vary across the UK and over time. Your local planning authority and the Planning Portal are the definitive sources. We are an independent information and introduction service, not an installer.