The short answer
A UK conservatory in 2026 costs in the range of £9,000 to £35,000 for a typical 3-bed semi, with the size, style, material, and region doing most of the work. A small lean-to on a 3-bed semi can be priced from around £9,000 in uPVC, while a large orangery on a detached house can run £35,000+ in aluminium or timber.
| Style | Typical 2026 price band (mid-range, 3-bed semi) | Best for | |-------|-------------------------------------------------:|----------| | Lean-to | £9,000–£14,000 | Budget projects, narrow side returns | | Victorian / Edwardian | £14,000–£25,000 | Most UK 3-bed semis, traditional look | | Gable-front | £18,000–£30,000 | Detached and large semis, modern look | | P-shaped / T-shaped / L-shaped | £25,000–£40,000 | Wrap-around, larger footprint | | Orangery | £30,000–£50,000+ | Premium build, brick pillars + glazed roof |
For a quick worked example: a 12 m² Edwardian conservatory in uPVC for a 3-bed semi in the Midlands lands at roughly £14,000–£18,000 all-in for the shell, with double-glazed units and standard finishing.
Conservatory cost by size
The single biggest cost driver is the floor area in m², with most 2026 UK pricing guides expressing the per-m² band as the cleanest comparison. A typical 2026 per-m² band for a uPVC conservatory shell (frame, glazing, base, roof) sits at £1,000–£1,500/m² for the Midlands, with £1,200–£1,800/m² for London and the South East, and £850–£1,300/m² for the North, North East, and Wales.
| Floor area | Typical 2026 use case | uPVC shell price band | |------------|-----------------------|----------------------:| | 9 m² (3×3 m) | Small lean-to, narrow side return | £9,000–£14,000 | | 12 m² (3×4 m) | Mid-sized Edwardian, typical 3-bed semi | £12,000–£18,000 | | 16 m² (4×4 m) | Larger Edwardian / Victorian, big semi | £16,000–£25,000 | | 20 m² (4×5 m) | Gable-front, detached house | £20,000–£30,000 | | 25 m²+ | P-shaped, L-shaped, large orangery | £25,000–£50,000+ |
The price jumps between bands are not strictly linear: a 20 m² gable-front conservatory is more than 2× the price of a 9 m² lean-to, because the larger footprint triggers more glass, more roof structure, and more substantial foundations.
Conservatory cost by style
The four main styles, and the 2026 price difference between them:
Lean-to
A lean-to is the simplest and cheapest style. It has a single-slope roof that runs from the house wall down to a lower outer wall, usually against a bungalow, a single-storey extension, or a low eaves. Typical 2026 price: £9,000–£14,000 for a 9–12 m² uPVC lean-to on a 3-bed semi.
Victorian
A Victorian conservatory has a multi-faceted bay front (usually three or five facets) with a pitched roof and a ridge. It is the most common style on UK 3-bed semis because the bay front suits a typical rear garden layout. Typical 2026 price: £14,000–£25,000 for a 12–16 m² Victorian in uPVC.
Edwardian
An Edwardian conservatory is rectangular or square, with a square or rectangular footprint and a hipped or gable roof. It is slightly cheaper than a Victorian because the simpler shape uses less frame. Typical 2026 price: £13,000–£22,000 for a 12–16 m² Edwardian in uPVC.
Gable-front
A gable-front conservatory has a full-height gable end facing the garden, with a steeply pitched roof. It is the more modern-looking style, popular on 21st-century housing stock. Typical 2026 price: £18,000–£30,000 for a 16–20 m² gable-front in uPVC.
P-shaped / T-shaped / L-shaped
These are combinations of a rectangular and a lean-to footprint, typically used to wrap around a corner of the house. They give the largest floor area but cost the most. Typical 2026 price: £25,000–£40,000 for a 20–25 m² P-shape in uPVC.
Orangery
An orangery is a brick-built extension with glazed roof panels and brick pillars between the windows. It is the most expensive option because of the brickwork, but it sits more harmoniously with the host house and is usually treated as a permanent extension for planning and tax purposes. Typical 2026 price: £30,000–£50,000+ for a 16–20 m² orangery in uPVC or aluminium.
Conservatory cost by material
The three common frame materials in 2026 are uPVC, aluminium, and timber. The 2026 premium structure is consistent across most UK pricing guides:
- uPVC: baseline cost, from around £10,000–£15,000 for a 3×3 m (9 m²) build with mainstream installers.
- Aluminium: typically 20–30% above uPVC, around £12,000–£22,000 for a comparable 9 m² build.
- Timber (hardwood or softwood): typically 30–50% above uPVC, around £15,000–£30,000+ for a comparable 9 m² build, with high-end oak reaching the upper end.
The choice of material affects the lifespan and the thermal performance. uPVC conservatories typically last 20–25 years, aluminium 30+ years, and timber 25–40 years with regular maintenance. Thermally, modern aluminium and timber both beat uPVC once the frame is broken by a thermal break; a thermally broken aluminium frame is now the premium standard for new builds.
Conservatory cost by region
The same 12 m² Edwardian uPVC conservatory that costs £14,000–£18,000 in the Midlands will cost £17,000–£22,000 in Outer London and £13,000–£17,000 in the North East. The regional bands look like:
| Region | 2026 premium vs UK mid-range | Indicative 12 m² Edwardian uPVC band | |--------|------------------------------:|------------------------------------:| | Inner London | +25–35% | £18,000–£24,000 | | Outer London | +15–25% | £16,000–£22,000 | | South East (outside London) | +10–20% | £15,000–£22,000 | | Midlands | Baseline | £14,000–£18,000 | | North West / Yorkshire | –5–10% | £13,000–£17,000 | | North East / Wales | –10–15% | £12,000–£16,000 |
The London premium reflects the same labour and site-overhead drivers as for loft conversions: skip licences, scaffolding permits, parking-suspension costs, and Party Wall exposure. A conservatory rarely triggers a Party Wall Award on its own (it usually does not touch the party wall), but the labour rate and site overheads still apply.
What affects the price beyond size, style, material, and region?
- Glazing. Double-glazed is the 2026 baseline; triple-glazed adds roughly 10–15% to the glazing line. Self-cleaning glass adds another 5–8%. Solar-control glass for south-facing elevations is another 5–10%.
- Roof. A polycarbonate roof is the cheapest option and is now largely outdated for energy reasons. A glass roof is the 2026 standard, with a "warm roof" (a solid tiled roof with internal insulation) the premium option at 25–40% above glass.
- Foundations. A standard conservatory base on a 3-bed semi assumes straightforward ground. Made ground, a high water table, or a public sewer running under the conservatory can add £1,000–£5,000 to the foundation line.
- Doors and openings. A set of bi-fold doors between the house and the conservatory adds £1,500–£3,000 to the total if the existing wall needs structural alteration.
- Electricians and heating. Most conservatories in 2026 need at least two double sockets, a light, and a radiator or underfloor heating loop. Allow £800–£1,800 for the first-fix M&E.
A 2026 fixed-fee conservatory quote from a national installer usually includes the shell, the base, the roof, the doors, and the standard first-fix M&E. It usually does not include the building regulations application, the electrician's certificate, or any internal decoration. Always ask for a like-for-like scope in writing.
For the planning-permission question, the rules around conservatories and PD rights are covered in Do You Need Planning Permission for a Conservatory?.
icelabz provides RICS-compliant measured building surveys for homeowners planning a conservatory or extension across London and the South East, with deliverables in 2D CAD and (optionally) Revit BIM. Contact us for a fixed-fee quote.