An orangery extension is a premium home improvement that sits between a conservatory and a traditional single-storey extension. In the UK, orangery costs vary widely depending on size, materials, roof design, and how the structure integrates with your existing home.
In 2026, most homeowners can expect orangery extension costs to range from £20,000 to £60,000, with smaller builds at the lower end and bespoke, high-spec designs pushing costs higher. Factors such as brickwork, glazing systems, roof lanterns, internal finishes and window and glazing costs all have a significant impact on the final price.
This guide breaks down realistic orangery extension costs in the UK, explains what drives prices up or down, and helps you decide whether an orangery is the right type of extension for your home before speaking to installers.
TL;DR
- Typical cost: £20,000–£60,000
- Small orangery: £20,000–£30,000
- Medium orangery: £30,000–£40,000
- High-spec orangery: £40,000+
- Cheaper than full extensions, more expensive than conservatories
Key Cost Factors
When planning an orangery extension, understanding the key cost factors is essential for budgeting effectively. The average cost of an orangery kitchen extension in 2024 ranges from £25,000 to £40,000. This cost is largely influenced by the size, design complexity, and chosen features of the extension. Modern orangery designs can start at about £10,000 and rise to £60,000, depending on specific factors such as location, materials, and finishing options.
Small orangeries typically cost between £25,000 and £30,000 when used as kitchen extensions, while medium-sized ones fall in the £30,000 to £35,000 range. The price of an orangery can significantly increase with personalisation, intricate finishes like patio and bifold doors options, and additional features like skylights. Each of these elements can add distinct value and functionality to the home’s living space, influencing the final cost.
What Affects the Cost of an Orangery Extension?
Several practical factors influence the final cost of an orangery extension. Understanding these helps explain why quotes can vary significantly between properties.
Size and Layout
The size of the orangery has the biggest impact on cost. Larger footprints require more materials, glazing, foundations, and labour.
As a general guide:
- Small orangeries (10–15m²) sit at the lower end of the cost range
- Medium orangeries (15–20m²) fall into the mid-range
- Larger or bespoke designs quickly push costs beyond £40,000
Complex layouts, unusual shapes, or structural changes to the existing property can also increase costs.
Materials and Build Quality
Material choice affects both upfront cost and long-term performance.
- uPVCÂ is the most cost-effective option and offers good insulation with minimal maintenance
- Aluminium provides slimmer frames and a more modern appearance but costs more
- Timber offers a traditional look but is typically the most expensive and requires ongoing maintenance
Brickwork, roof lantern systems, glazing specification, and internal finishes all contribute to price variation.
Roof Design and Glazing
Most orangeries feature a solid perimeter roof with a central glazed lantern or roof light. Costs increase with:
- Larger or bespoke lantern roofs
- High-performance glazing
- Solar control or self-cleaning glass
Higher-spec glazing improves year-round comfort but comes at a higher initial cost.
Orangery vs Conservatory vs Extension: Cost Comparison
Understanding where an orangery sits compared to other extension options helps set realistic expectations.
- Conservatory: £10,000–£25,000
- Orangery: £20,000–£60,000
- Single-storey extension: £40,000–£70,000+
While orangeries are more solid and thermally efficient, they are typically come in a little higher than standard conservatory costs, but are quicker to build and a little more cost-effective than full extensions.
Planning Permission and Regulations
Many orangeries fall under permitted development rights, meaning planning permission may not be required. However, permission is more likely if:
- The property is listed
- The home is in a conservation area
- The orangery exceeds size or height limits
Regardless of planning permission, building regulations approval is required to ensure structural safety and energy efficiency.
How Long Does an Orangery Take to Build?
Most orangery projects take 4 to 12 weeks to complete once work begins.
Timelines depend on:
- Design complexity
- Groundworks and foundations
- Roof and glazing lead times
- Weather conditions
Early planning and clear specifications help avoid delays.
Does an Orangery Add Value to a Home?
A well-designed orangery can increase property value by improving usable living space and visual appeal.
Value gains depend on:
- Build quality
- Integration with the existing property
- Location and buyer demand
While not guaranteed, orangeries often perform better than conservatories in terms of resale appeal.
Is an Orangery Worth the Cost?
An orangery is best suited to homeowners who want:
- A light-filled living space usable year-round
- Better insulation than a conservatory
- A more integrated look than a glass extension
They are not the cheapest option, but they offer a strong balance between cost, comfort, and long-term value.
Getting an Accurate Orangery Cost
Online estimates are useful for budgeting, but final costs depend on your home, layout, and specification.
For the most accurate pricing:
- Decide how the space will be used
- Set a realistic budget range
- Compare multiple quotes
- Check what is included in each quote (groundworks, glazing, finishes)
If you’re budgeting for an orangery extension, understanding realistic cost ranges upfront helps you plan confidently and avoid surprises later.lacement or repair makes sense for your home, speaking to a local installer can help clarify options before you sell.