A conservatory is one of the more affordable ways to add real living space to a UK home, since it usually avoids the heavier structural work a brick extension needs. This guide breaks down realistic 2026 pricing by style and what actually drives the cost up or down.
How Much Does a Conservatory Cost in the UK?
A conservatory in the UK typically costs between £8,000 and £30,000 fully fitted in 2026, with most homeowners spending around £15,000 for a mid-range build. A basic lean-to with a polycarbonate roof sits at the lower end, while a large Victorian, P-shaped, or orangery-style conservatory with a solid tiled roof can push well beyond £25,000.
Conservatory Cost by Style
| Style | Typical cost | Notes |
|---|---|---|
| Lean-to | £8,000 to £14,000 | Simple sloped roof, the most affordable and popular style |
| Victorian | £12,000 to £22,000 | Bay-fronted design with a more traditional look |
| P-shaped | £16,000 to £25,000 | Combines lean-to and Victorian shapes for extra space |
| Orangery | £25,000 to £40,000+ | More brickwork and a solid roof, closer to a traditional extension |
What Affects the Cost
Roof Type
The roof is usually the single biggest cost variable. A polycarbonate roof is the cheapest option but performs poorly at both ends of the temperature scale, often making the room too hot in summer and too cold in winter to use year-round. A glass roof improves usability at a moderate cost increase, while a solid tiled roof, typically adding £2,000 to £6,000 over polycarbonate, gives the best year-round comfort and can make the space feel more like a genuine extension.
Size
Smaller conservatories often cost more per square metre than larger ones, since fixed costs such as the base, doors, and connection into the house do not scale down proportionally with a smaller footprint.
Glazing
Standard double glazing is included in most base quotes, while solar-control or self-cleaning glass adds a premium, typically £1,000 to £3,000, in exchange for better temperature control and less maintenance.
Base and Foundations
A conservatory still needs proper foundations regardless of style, and ground conditions, drainage, and whether an existing patio or path needs removing can all affect this part of the cost.
Do You Need Planning Permission?
Most conservatories fall under permitted development and do not need planning permission, provided they stay within set size and height limits and do not cover more than half the garden. Even where planning permission is not required, a conservatory still needs to meet building regulations if it includes a solid roof, has its own heating system, or is not properly separated from the main house by external-quality doors. Always confirm your specific plans with your local planning authority before starting work.
If you are weighing a conservatory against a full extension, our home extension cost guide covers pricing for that alternative, and our home improvement financing guide covers how to fund either project.
Is a Conservatory Worth It?
A well-built conservatory can add genuine living space and some resale value, particularly if it is usable year-round rather than only in mild weather. A cheap, poorly insulated conservatory with a basic polycarbonate roof often sees limited use beyond a few months a year, which is worth weighing against the extra cost of a solid or glass roof if year-round comfort matters to you.
Frequently Asked Questions
What is the cheapest type of conservatory?
A lean-to conservatory with a polycarbonate roof is generally the cheapest option, typically starting from around £8,000, though it performs less well at temperature extremes than pricier roof options.
Do I need planning permission for a conservatory?
Most conservatories fall under permitted development and do not need planning permission, provided they meet size and coverage limits. Building regulations may still apply depending on the roof type and heating system used.
Is a solid roof worth the extra cost on a conservatory?
For many homeowners, yes, since a solid or glass roof makes the space usable year-round rather than only in mild weather, which is often the main reason cheaper polycarbonate-roofed conservatories go underused.
How long does it take to build a conservatory?
Most conservatories take between four and eight weeks to complete, depending on style, size, and whether any groundwork or planning approval is needed first.
How much value does a conservatory add to a house?
A well-built, usable conservatory can add modest resale value, though the return varies by property type and local market, and a poorly built or rarely used one may add little beyond the initial living space benefit.
Costs in this article are general UK estimates for 2026 and vary by region, installer, and specification. Always obtain multiple quotes from FENSA-registered installers before committing to a project.
About the Author
Spire Homes Editorial Team researches and writes practical, UK focused home improvement guides covering renovation planning, financing, interior design, and property maintenance. Our content is reviewed for accuracy and updated as prices and standards change.
