How Much Does a Conservatory Cost in the UK? Orangery and Garden Room Prices for 2026

A brick-built, orangery-style conservatory of around 14m² with a roof lantern and French doors costs £50,000 to £57,500 including VAT and professional fees at West Midlands rates, based on Quoteio’s pricing engine. The same room runs £46,000 to £55,000 in the North East and £65,000 to £81,000 in inner London. A lightweight glazed conservatory on a dwarf wall usually costs less, but it is a supply-and-fit product priced by installers, so we explain what drives that price instead of guessing a number.

What counts as a conservatory today?

The word covers two quite different builds, and the price gap between them is the main reason quotes vary so much.

• A glazed conservatory: a uPVC or aluminium frame, mostly glass walls and a glass or polycarbonate roof, usually on a low brick wall. Lean-to, Victorian, Edwardian, P-shaped and gable-fronted are all styles of this. Installers sell them as a product: survey, base, frame, glazing, fit.
• An orangery or garden room: brick or block walls with large windows, a flat roof perimeter and a glazed roof lantern in the middle. It is built by a builder, much like a small single storey extension, and it is the version Quoteio prices from job data.

If you want a room you will use in January and in August, most people end up nearer the second option. That is why we price it, and why the rest of this guide is built around it.

How much does an orangery-style conservatory cost by size and spec?

These are full project prices from the live engine: foundations, walls, a warm flat roof, a roof lantern, French doors, electrics, plumbing, drawings, structural calculations, building regulations, a householder planning fee and 20% VAT.

For comparison, a plain 3m × 3m single storey extension with no lantern and no glazed doors comes out at £38,500 to £44,500. The roof lantern and French doors in the medium room add about £4,200 including VAT on their own.

Notice that the price per square metre falls as the room gets bigger. Drawings, structural calculations, drainage, scaffold and the first part of the electrics cost much the same whether the room is 10m² or 20m², so a small room carries those fixed costs over fewer square metres.

What drives the price of a glazed conservatory?

We don’t publish a figure for lightweight glazed conservatories, because our data comes from builds a builder does, not from installer price lists. When you compare installer quotes, these are the things that move the number:

1. Frame material. White uPVC is the cheapest. Coloured or woodgrain uPVC costs more, aluminium more again, and hardwood is the most expensive and needs looking after.
2. Roof type. Polycarbonate is cheapest but noisy in rain and poor at holding heat. Glass with a solar control coating costs more. A solid or tiled roof costs the most and usually brings Building Regulations into play.
3. Glazing. Double glazing is standard. Triple glazing, self-cleaning glass and solar control coatings each add to the price.
4. The base and dwarf wall. Some quotes include the groundwork, some don’t. Ask whether the price covers digging the foundations, the slab, the dwarf wall and removing the spoil.
5. Size and shape. A lean-to is the simplest shape. Victorian and Edwardian styles have more frame sections and corners, and P-shaped or T-shaped designs more again.
6. Heating, power and flooring. Sockets, lighting, an electric radiator or underfloor heating, and the floor finish are often extras.

Get at least three written quotes that list exactly the same things. If one installer includes the base and another doesn’t, the cheaper quote may not be cheaper at all.

How do prices change across the UK?

Here is the medium orangery-style room (4m × 3.5m, standard spec) priced for every UK region. Building costs in London and the South East run well above the West Midlands, while the North East, Wales and Northern Ireland come in lower.

For a closer figure, the regional pages break prices down further, for example the South East, the North West and the West Midlands, where our base job data comes from. Or enter your postcode in the calculator for a range tuned to your area.

Do you need planning permission or Building Regulations?

Many conservatories fall under permitted development, so no planning application is needed, provided the room stays within the depth and height limits for your type of house and you are not in a conservation area or a listed building. Our figures include the £528 householder planning fee that applies in England, to be safe. If yours is permitted development you can usually drop that, or swap it for a lawful development certificate at £264 if you want written proof for when you sell.

On Building Regulations, a conservatory is usually exempt if it is under 30m², separated from the house by external-quality walls, doors or windows, heated independently of the main house system, and glazed to safety glass rules. An orangery with solid walls and the doors to the house removed is treated as an extension and will normally need approval, which is why our orangery prices include building regulations fees. Check with your council’s planning and building control teams before you commit, because the rules differ between England, Wales, Scotland and Northern Ireland.

One trap to watch: replacing an existing glass or polycarbonate roof with a solid tiled one usually means the room no longer meets the exemption, so it will need Building Regulations approval, and the frame and base must be checked to carry the extra weight.

Conservatory or single storey extension?

Once you add brick walls, a lantern and proper heating, an orangery is most of the way to a single storey extension. Compare the medium orangery-style room at £50,000 to £57,500 with a full 20m² single storey rear extension in our single storey extension cost guide. If the room is going to be a kitchen or dining space you’ll use every day, it is worth pricing both. A kitchen inside the new room is a bigger job again, covered in our kitchen extension cost guide.

A glazed conservatory still has its place. It is quicker to fit, it is often possible without planning or Building Regulations, and it suits a sunroom or garden room you use mainly from spring to autumn.

What is not included in these prices?

• Knocking through to the house, with a steel beam and making good, if you want the room open to the kitchen or lounge.
• Moving a drain, soil pipe or gas meter that sits where the foundations go.
• Flooring, blinds, furniture and decorating.
• Party wall costs if the room is on or near a shared boundary.
• Unusual ground conditions, such as clay near trees or made-up ground, that need deeper foundations.

You can read exactly how each figure is built on our methodology page.

The short version

A well-built 14m² orangery-style conservatory costs £50,000 to £57,500 at West Midlands rates, with VAT and fees included, and more in London and the South East. A glazed conservatory costs less but varies hugely by frame, roof and glazing, so compare like-for-like installer quotes. Whichever you choose, check planning and Building Regulations with your council first, and get a price for your own postcode before you speak to anyone.

Common questions