- What Is an Orangery Extension?
- Conservatory vs Orangery vs Full Extension: The Core Differences
- Side-by-Side Comparison
- Which One Is Right for Your Property?
- Planning Permission: What You Need to Know
- The Design Matters as Much as the Structure
- Budget Oversight Throughout, Not Just at the Start
- FAQs
- Making the Right Call for Your Home
You want more space. You want light. And you want something that actually feels like part of your home — not a glass box bolted to the back of it. That's where the orangery enters the conversation, and it's an option that genuinely deserves more attention than it tends to get when homeowners start planning an extension.
This article breaks down what an orangery extension is, how it stacks up against a conservatory and a full brick extension, and how to figure out which one makes sense for your property and your budget.
What Is an Orangery Extension?
An orangery is a hybrid structure — solid brick or rendered walls, large windows, and a flat or lantern roof with glazed sections. It sits somewhere between a conservatory and a full extension in terms of construction, cost, and how it feels to be in.
The defining feature is the roof lantern: a raised glazed section that draws natural light deep into the room without making the space feel exposed or prone to overheating. The solid walls provide thermal mass, which means the room holds heat far better than a conservatory and stays comfortable across all four seasons.
Historically, orangeries were a feature of grand estates — used to grow citrus trees through the winter months. Today, they're most commonly used as kitchen dining rooms, garden rooms, or open-plan living spaces that blur the line between inside and outside.
Conservatory vs Orangery vs Full Extension: The Core Differences
These three options come up together because they all add space to the rear or side of a property. But they're quite different in how they're built, what they cost, whether they need planning permission, and what it's actually like to live in them.
Conservatory
A conservatory is predominantly glass — glazed roof, largely glazed walls, typically built on a shallow base. It's the most affordable of the three and the quickest to put up.
The trade-off is comfort. A glass roof means the room bakes in summer and loses heat rapidly in winter, unless you invest in high-specification glazing. Most conservatories become genuinely unusable for part of the year without additional heating or cooling. They can also feel visually disconnected from the rest of the house.
Under permitted development, planning permission is usually not required for a conservatory, provided it meets the relevant size and height limits and is separated from the main house by external walls, doors, or windows.
Orangery
An orangery costs more than a conservatory because the materials are more substantial — brick piers, solid wall sections, a quality roof lantern. But what you get in return is a room that works year-round, with better insulation, better acoustics, and a more considered finish.
From a planning perspective, an orangery is generally treated similarly to a conservatory, though the specifics depend on the design and your property type. Listed buildings and conservation areas are a different matter entirely.
Full Extension
A full brick or masonry extension has no glazed roof. It's built to the same standard as the rest of your house — full insulation, solid roof, the same thermal performance as any other room. That gives you the most flexibility in terms of layout, ceiling height, and how the space connects to the rest of the property.
A full extension typically costs more than an orangery of the same footprint, but it adds the most value and creates the most versatile space. You can put a bedroom above it, run services through it, and finish it however you like.
Full extensions almost always require planning permission unless they fall within permitted development limits — which tend to be more restrictive than most homeowners expect.
Side-by-Side Comparison
| Feature | Conservatory | Orangery | Full Extension |
|---|---|---|---|
| Roof type | Fully glazed | Lantern with solid sections | Solid, insulated |
| Thermal performance | Poor to moderate | Good | Excellent |
| Year-round usability | Limited | Yes | Yes |
| Planning permission | Usually not required | Usually not required | Usually required |
| Relative cost | Lower | Mid-range | Higher |
| Property value uplift | Moderate | Good | Strong |
| Design flexibility | Limited | Moderate | High |
| Build time | Shorter | Moderate | Longer |
Which One Is Right for Your Property?
Four things shape the answer: what you want the space to do, how your property is built, what your local planning rules allow, and what your budget can support.
If you want a light-filled garden room or dining space
An orangery is often the strongest fit. The lantern roof creates a quality of light that a solid extension can't replicate without rooflights, and the room feels more connected to the garden than a fully enclosed space. It also tends to sit naturally on Victorian and Edwardian terraces, which make up a significant proportion of London's housing stock.
If you want to maximise usable floor area and add real value
A full extension is worth the additional investment. You get a room that performs like any other room in the house — no compromises on insulation, no limitations on flexibility. For a kitchen extension in particular, the ceiling height and structural options available with a full build can produce something genuinely impressive.
If budget is the primary constraint
A conservatory can still be a reasonable option, particularly with a well-insulated roof system and realistic expectations about winter performance. For many homeowners, it works as a practical interim step.
Planning Permission: What You Need to Know
In England, conservatories and orangeries often fall under permitted development — meaning no full planning application is required. But the rules carry specific conditions around maximum height, distance from boundaries, and how much of the garden the structure can cover.
Full extensions are more likely to need planning permission, especially if they extend beyond the rear wall by more than three metres on a terraced or semi-detached house, or four metres on a detached house. These limits can be extended to six or eight metres respectively under the neighbour consultation scheme, though that process has its own requirements.
If your property sits in a conservation area, an Article 4 direction may remove permitted development rights altogether. This applies across many parts of London — Chelsea, Notting Hill, and Hammersmith among them. Always check with your local planning authority before assuming permitted development covers your project.
The Design Matters as Much as the Structure
A poorly designed orangery will look awkward regardless of how well it's built. The proportions of the brick piers, the scale of the roof lantern, the choice of materials, the way the internal layout connects to the existing kitchen or living room — all of it determines whether the result feels like a natural part of the house or something that was added as an afterthought.
This is where working with a team that handles design and build together makes a real difference. When the people designing the space are also responsible for building it, the details stay consistent from drawing to delivery. There's no gap between what was specified and what gets built.
At MVV, design and build work under one team from start to finish. Your orangery or extension is designed with the build in mind from day one, and your budget is tracked throughout with monthly progress reports — not just reviewed at the beginning and forgotten.
Curious what your project might cost? The instant estimator at themvv.co.uk gives you a real figure upfront, no consultation required.
Budget Oversight Throughout, Not Just at the Start
One of the most common frustrations homeowners face is that the initial quote bears little resemblance to the final bill. It's a real problem in residential construction, and it tends to happen when budget planning stops after the first estimate.
Proper budget oversight means tracking costs against the plan at every stage, flagging variances early, and giving you the information you need to make decisions before they become expensive ones. Monthly progress reports with budget tracking are a standard part of how MVV manages projects — not an optional extra.
FAQs
What is the difference between an orangery and a conservatory?
A conservatory has a fully glazed roof and predominantly glass walls, which limits its thermal performance. An orangery has solid brick or rendered walls with a glazed lantern roof section, making it warmer, more comfortable year-round, and more closely integrated with the main house.
Does an orangery extension add value to a property in the UK?
Generally yes, particularly when it's well-designed and built to a high standard. A quality orangery that functions as a usable year-round room adds more value than a standard conservatory. The exact uplift depends on the property, location, and quality of the build.
Do I need planning permission for an orangery extension in the UK?
In many cases, an orangery falls under permitted development and doesn't require a full planning application, provided it meets the relevant size, height, and boundary restrictions. If your property is listed, in a conservation area, or subject to an Article 4 direction, you'll need to apply. Always confirm with your local planning authority.
How long does it take to build an orangery extension?
Build time varies with size and complexity, but a typical orangery takes between eight and sixteen weeks from groundworks to completion. A full extension of similar footprint usually takes longer due to the additional structural work involved.
Is an orangery cheaper than a full extension?
Usually, though the gap depends on specification. An orangery uses more substantial materials than a conservatory, so it costs more than a basic glazed structure. A full brick extension of the same footprint will typically cost more than an orangery because of the solid roof, full insulation, and additional structural work required.
Can an orangery be added to a Victorian terrace in London?
Yes, and it can work very well. The brick construction of an orangery tends to complement the materials of a Victorian terrace more naturally than a fully glazed conservatory. That said, many Victorian terraces in London sit within conservation areas, so it's worth checking your permitted development rights with the local council before proceeding.
What is the best use for an orangery extension?
Kitchen dining rooms and garden rooms are the most popular choices. The quality of light from the roof lantern makes an orangery particularly well-suited to spaces where you want a strong connection to the garden while staying comfortable throughout the year.
Making the Right Call for Your Home
An orangery occupies a genuinely useful position in the market. It costs less than a full extension, performs far better than a conservatory, and creates a quality of space that's difficult to achieve any other way.
The decision between the three options comes down to what you want the space to do, what your property allows, and what your budget can support. Getting those three things aligned from the start is what separates a project that delivers on its promise from one that falls short.
Ready to get started? Get your free cost estimate in minutes at themvv.co.uk.