How Much Does a Conservatory Cost in the UK?
Updated: 8 hours ago
Across the UK market, a conservatory typically costs £9,000 to £16,000 for a standard-frame lean-to, Edwardian or Victorian room and £18,000 to £32,000 for a 4m x 3m aluminium room, supplied and fitted including VAT, rising to well over £100,000 for a large bespoke hardwood design. In the middle, a modern winter garden conservatory, an insulated aluminium room built for year-round use, costs £2,500 to £3,500 per square metre for the structure, so a 4m x 3m room is £30,000 to £42,000 before building works. A period hardwood conservatory sits above that and a small standard room below it. Two quotes for the same footprint can still differ by tens of thousands of pounds, depending on the base, the glazing and what happens inside once the structure is up.
We design and build luxury conservatories across the UK, and the winter garden figures below come from our own projects.
Typical UK prices
Market prices, supplied and fitted, including VAT:
Standard-frame lean-to, around 3m x 3m: £9,000 to £13,000.
Standard-frame Edwardian or Victorian, 3m x 3m to 4m x 3m: £11,000 to £16,000.
Gable-fronted conservatory: £13,000 to £18,000.
P-shape or other large combination, 20 square metres and over: £17,000 to £35,000.
Aluminium conservatory, around 4m x 3m: £18,000 to £32,000.
Our winter garden structure is £2,500 to £3,500 per square metre excluding VAT, with bespoke hardwood above it at the top of the market. These are typical UK market prices from published cost guides as of 2026; bespoke designs are priced after a survey.
How much does a conservatory cost by size?
Size is the first thing that moves the price, and the relationship is not quite linear. A small conservatory carries a fixed cost in the base, the connection to the house and the site set-up, so the price per square metre falls as the room gets larger.
A 3m x 3m conservatory, which is 9 square metres, is the smallest room that still feels like a room. At winter garden rates of £2,500 to £3,500 per square metre, the structure alone is £22,500 to £31,500 before the base and the finishing works. A standard aluminium conservatory of the same size would come in lower, with a thinner frame specification and a less capable roof to match.
A 4m x 3m conservatory is the size most people search for, and for good reason. Twelve square metres is enough for a dining table or a proper sitting area without dominating a typical rear garden. At winter garden rates that is £30,000 to £42,000 for the structure, and a bespoke hardwood version would sit above that, priced on its design and joinery.
A 5m x 3m conservatory gives 15 square metres, which is the point at which a room starts to serve two purposes: a kitchen extension with a seating end, or a garden room with a study corner. Expect £37,500 to £52,500 for the winter garden structure and more for hardwood.
Above 20 square metres you are into the territory where the design is usually bespoke whatever the material, and where the base, the drainage and any structural opening into the house become a meaningful share of the cost.
What does a conservatory cost by build type?
The material and the specification move the price more than size does. Three broad types cover most of what gets built.
A standard aluminium conservatory uses stock profiles and a polycarbonate or basic glass roof. It is the cheapest way to add a glazed room, and it is also the type that gives conservatories their reputation for being too hot in July and too cold in January. It sits well below a winter garden per square metre, and the saving shows in how the room performs.
A modern winter garden conservatory uses thermally broken aluminium, insulated glass throughout and a roof designed to be lived under all year. This is the type we build most often for modern homes, and it costs £2,500 to £3,500 per square metre for the structure. That figure excludes the building works, which we cover below.
A period hardwood conservatory is a different order of craftsmanship. A durable hardwood, hand-finished, with glazing bars, cresting and detailing that suit a Victorian, Georgian or Edwardian house. Our period hardwood conservatories are made to order down to the last millimetre, and each one is priced from its own design after a survey. For a sense of where hardwood work sits, our orangery projects, which share the same joinery, run from £80,000 to £200,000 at the premium end.
If you are choosing between a conservatory and an orangery, the orangery cost guide sets out the bands for that route, and the two are close enough at the top end that the choice is usually about the look rather than the budget.
What is included in the cost of a conservatory?
This is where quotes diverge, and where a low headline figure often turns out to be a structure-only price. A complete conservatory cost has four parts.
The structure is the frame, the glazing and the roof. This is what the per-square-metre figures above describe.
The building works are the wall foundations, the insulated slab base, blockwork and brickwork, underfloor heating, power and lighting points, screed, the connection to existing rainwater drainage and the plastering of internal walls. On a winter garden these are quoted separately from the structure, and they are not optional. A conservatory without proper footings is a problem waiting to happen, which is why we cover the subject in its own post on conservatory footings.
The finishes are paint, tiling or flooring, blinds and lighting fittings. Allow £120 to £150 per square metre for paint to the internal walls and a tiled floor.
The professional fees are planning, building regulations and structural design. A householder planning application in England has a national fee of £528 (from April 2025), with drawings on top; listed building consent carries no application fee, though the drawings and heritage statement it needs do cost. A building regulations notice is around £300, and a full plans application can exceed £1,500. Structural calculations are around £300 each.
VAT is charged at 20 per cent on top of build costs, so a £50,000 quote is £60,000 by the time it is paid.
What drives conservatory cost up or down?
Glazing is the single biggest lever after size. Double glazing is standard; triple glazing, solar control coatings and self-cleaning glass each add to the price and each changes how the room performs. On a south-facing conservatory, solar control glass is the difference between a room you use in August and one you avoid.
The roof is the second lever. A glass roof costs more than polycarbonate and is worth every pound. A solid or tiled roof costs more again and turns the room into something closer to an extension, which we discuss in our guide to conservatory roof types.
The base and the ground conditions matter more than most people expect. Poor soil, tree roots, drains under the footprint or a sloping site all add to the foundation work. A structural engineer's involvement at the design stage is cheaper than discovering the problem on site.
The connection to the house is the last variable. A conservatory that keeps the existing external door costs less than one where the wall between house and conservatory is opened up with a steel beam. The open-plan version is usually the better room, but it also changes the planning and building regulations position, because the conservatory is no longer separated from the house.
How much does a conservatory cost by style?
For the same floor area and specification, the roof shape sets the order of cost, from least to most (our conservatory ideas show each style built):
Lean-to: a single-pitch roof running down from the house wall, with the fewest glazing bars. Usually the least expensive way to achieve a given floor area; our guide to lean-to conservatory cost explains what drives its price.
Edwardian (Georgian): a square or rectangular plan under a hipped roof. It makes the most of the floor space for a modest step up in cost.
Victorian: a faceted bay front with a steeper, more complex roof, which means more components and more junctions to seal.
Gable: a pitched roof with an upright glazed front, more glass and more height, and a higher cost to match.
P-shape and T-shape: combinations of the above for larger rooms, and the most complex roofs of all.
Modern flat roof with a lantern: a modern conservatory with an insulated flat roof and a lantern costs more than a lean-to of the same footprint but gives a very different, taller room.
How much should you budget for a conservatory in total?
For a 4m x 3m winter garden conservatory, a realistic all-in budget is the structure at £30,000 to £42,000, the building works on top (base, heating, electrics and drainage, which vary with the ground and the house), the finishes at around £1,500 to £2,000, professional fees of £1,500 to £3,000, and VAT on the lot. For a hardwood conservatory of the same size, the structure figure rises with the joinery, and we give that number after a design visit.
It is a larger number than most headline prices, and the right one to plan around. A conservatory built on a proper base, with the right glass and a heating plan, will still be a room you use in thirty years.
Conservatory cost questions, answered
How much does a conservatory cost in the UK on average?
Market prices run from about £9,000 for a standard-frame lean-to to £32,000 for a 4m x 3m aluminium room, including VAT. For a modern winter garden conservatory, £2,500 to £3,500 per square metre for the structure, so a typical 12 square metre room is £30,000 to £42,000 before the base, finishes and VAT.
Does a conservatory add value to a house?
A well-designed conservatory that is genuinely usable all year adds living space, and living space adds value. A cold, cheaply built one can have the opposite effect, because buyers see a room they will need to replace. Quality of build matters more to value than size.
Why is a hardwood conservatory so much more expensive?
The material is more costly, but the real difference is the labour. A hardwood conservatory is joinery made to order, with every glazing bar, sill and moulding cut and finished for that house. An aluminium system is assembled from profiles. Both can be excellent; they are simply different amounts of work.
Can we get an accurate conservatory cost before committing?
Yes. We survey the site, look at the ground conditions and the connection to the house, and give you a design and a full cost that includes the building works rather than the structure alone.
Talk to our design team
If you would like to talk to us about your project, that is where every conservatory we build starts.
