Orangery Extension Cost Calculator
The average orangery extension cost in the UK is £20,000 to £40,000 in 2026 for a typical 4 m × 4 m (16 m²) orangery. Per m², a supplied and built orangery costs about £850 to £2,000 in uPVC, £1,600 to £2,500 in aluminium and £2,000 to £3,000 in hardwood.
- uPVC, per m²£850 – £2,000
- 16 m² orangery£20,000 – £40,000
- Hardwood, per m²£2,000 – £3,000
Prices checked November 2026 · UK figures include labour and materials unless stated
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Orangery cost per m² (2026)
| Frame | Supply and build per m² | 16 m² orangery |
|---|---|---|
| uPVC | £850 – £2,000 (average about £1,200) | £14,000 – £32,000 |
| Aluminium | £1,600 – £2,500 (average about £2,100) | £26,000 – £40,000 |
| Hardwood | £2,000 – £3,000 (average about £2,500) | £32,000 – £48,000 |
Small orangery extension cost
A small 3 m × 3 m orangery (9 m²) costs roughly £7,650 to £18,000 in uPVC and £14,400 to £22,500 in aluminium, before bi-fold doors and VAT. Small orangeries cost more per m² than large ones because the roof lantern, doors and groundwork are a bigger share of the total.
Cost of an orangery vs an extension or conservatory
- Conservatory: mostly glass, the cheapest option, but can be too hot in summer and cold in winter.
- Orangery: brick piers and a solid perimeter roof with a glass lantern, so it feels more like a room and is easier to heat.
- Extension: a full masonry room, usually £1,800 to £3,000 per m², and the most like the rest of the house.
Planning permission for an orangery
Many orangeries count as permitted development, like a single-storey rear extension, if they stay within limits on depth and height and do not cover more than half the garden. If the orangery is separated from the house by external-quality walls and doors and has its own heating, it may be exempt from building regulations; otherwise approval is needed. Always check with your council or the Planning Portal before you order.
How this orangery price calculator works
We multiply the floor area by a 2026 supply-and-build price per m² for the frame you choose, then add bi-fold doors (£3,000 to £5,000) and VAT if selected, and adjust for your region.
Frequently asked questions
How much does an orangery cost in the UK?
Most orangeries cost £20,000 to £40,000 in 2026. A uPVC orangery is about £850 to £2,000 per m², aluminium about £1,600 to £2,500 and hardwood about £2,000 to £3,000 per m².
How much is a 4×4 orangery?
A 16 m² orangery typically costs around £14,000 to £32,000 in uPVC, £26,000 to £40,000 in aluminium and £32,000 to £48,000 in hardwood.
Is an orangery cheaper than an extension?
Usually yes. Orangeries are typically cheaper per m² than a full brick extension, especially in uPVC, though a high-spec hardwood orangery can cost as much.
Do you need planning permission for an orangery?
Often not, as many orangeries are permitted development. Larger designs, listed buildings and conservation areas usually need permission.
How long does it take to build an orangery?
Most orangeries take about 3 to 6 weeks on site once the base and frame are ready, plus a lead time of several weeks for manufacture.
How much is an orangery extension?
Most orangery extensions cost £20,000 to £40,000 in 2026. A kitchen orangery with bi-fold doors and a high-spec finish can cost more.
Where our prices come from
We compare published 2026 UK cost guides and trade price data, then use the middle of the range. Figures are for budgeting only and are not a quote. See how we price.