The short answer
A 2026 UK conservatory quote for a 3 m × 3 m (9 m²) uPVC Edwardian on a 3-bed semi typically lands in the £10,000–£15,000 range for a turnkey supply-and-fit package, or £5,000–£8,000 for a supply-only kit you fit yourself (or supply-and-fit a smaller regional installer). The headline price almost always includes the shell — frame, double glazing, roof, and standard external doors — but it rarely includes the building regulations application, the electrics, the floor finish, or the internal plastering. Those are the four line items that catch homeowners out.
For the full price-by-size, style, material, and region breakdown, see Conservatory Cost UK 2026: Price by Size, Style, and Region. This blog is the "what does the headline price actually buy you" version.
What a 2026 conservatory quote usually includes
A typical 2026 conservatory quote from a UK national or regional installer includes the items in the table below. The exact list varies between installers, which is why a like-for-like comparison is essential.
| Component | Usually included? | Notes | |-----------|:------------------:|-------| | Base / dwarf walls | Usually | uPVC or aluminium base, with brick or composite dwarf walls (~600 mm) | | uPVC or aluminium frame | Always | Frame is the bulk of the cost | | Double-glazed units | Always | 24–28 mm double-glazed, "A" rated as standard | | Glass or polycarbonate roof | Always | Glass is the 2026 standard; polycarbonate is a budget option | | French doors / patio doors | Always | Outward-facing doors into the garden are part of the shell | | Internal doors from the house | Sometimes | Some installers include; others treat as an extra £1,000–£3,000 | | Guttering and downpipes | Always | Proprietary guttering matched to the conservatory eaves | | Standard installation (labour) | Always | Includes the base build, frame erection, glazing, weatherproofing | | 10-year insurance-backed guarantee | Always | Standard for FENSA-registered installers |
If your quote does not list each of these as a separate line, ask the installer to confirm in writing. The two most commonly mis-quoted items are the base/dwarf walls (sometimes priced separately at £1,000–£2,500) and the internal doors from the house (sometimes priced separately at £1,500–£3,000 for a structural opening).
What a 2026 conservatory quote usually excludes
Five line items are commonly excluded even from a "fully fitted" 2026 conservatory quote. Most homeowners discover this only when the contract is signed and the invoice arrives.
- Building Regulations application. Many small, thermally-separated ground-floor conservatories are exempt from Building Regulations under Class E of the GPDO 2015 Schedule 2 Part 1, but if the conservatory does not meet the exemption criteria (over 30 m² floor area, separated from the house by anything other than a door, within 1 m of a boundary, etc.), a Full Plans or Building Notice application is required. The application itself is rarely more than a few hundred pounds in fees, but the cost of bringing the design up to Part K, Part L, Part F and Part B standards can add £1,000–£3,000 to the build.
-
Electrics. The most common exclusion. Sockets, lights, a fused spur for a radiator, and the consumer-unit change if required typically add £800–£1,500 to a 2026 conservatory project.
-
Internal plastering and making good. The plastering of the internal reveal where the conservatory meets the house is sometimes included, sometimes not. If the new conservatory opening exposes old brickwork that needs re-plastering and re-decorating, allow £500–£1,500 for the making-good work.
- Floor finishes. The standard quote usually includes a screeded base, not a finished floor. A tiled or laminate floor finish adds £2,000–£4,000 depending on size and material, and underfloor heating adds another £1,000–£2,500 for a 12 m² conservatory.
- Removal of an old conservatory. If you are replacing an existing conservatory, the demolition and disposal of the old structure typically adds £800–£2,000 to the project. The skip and waste-removal cost is the bulk of the line item.
The rule of thumb: add 15–20% on top of the headline quote to cover the items that are typically excluded. A £14,000 conservatory quote should be budgeted at £16,000–£17,000 to cover the realistic all-in cost.
A worked 2026 example
To put the inclusions and exclusions in context, here is a realistic 2026 build-up for a 3 m × 4 m (12 m²) uPVC Edwardian conservatory on a 3-bed semi in the Midlands:
| Line item | 2026 cost | Included in headline? | |-----------|----------:|:---------------------:| | Conservatory shell, supply and fit (frame, double glazing, glass roof, French doors, base) | £14,000 | ✓ | | Internal doors from the house (structural opening) | £1,800 | Often extra | | Electrics (two sockets, one light, fused spur for radiator) | £1,000 | Usually extra | | Building Regulations application (if required) | £300 | Sometimes included | | Internal plastering and decoration of the reveal | £800 | Usually extra | | Tiled floor finish | £2,500 | Usually extra | | Removal of the existing concrete patio | £500 | Usually extra | | 10% contingency | £2,100 | — | | Total realistic all-in cost | £23,000 | |
A £14,000 headline quote becomes a £23,000 project. The 60% premium is not the installer being misleading — it is the realistic cost of a complete, properly finished conservatory, including the items that the headline quote usually does not include.
How to compare two conservatory quotes
Three rules for comparing two 2026 UK conservatory quotes side by side:
-
Get a line-item breakdown in writing. Each quote should list the base, the frame, the glazing, the roof, the doors (internal and external), the guttering, and the labour as separate lines. If a quote is a single lump sum, ask the installer to break it out before you sign.
-
Check the roof spec. A glass roof and a polycarbonate roof can be £1,500–£3,000 apart on a 12 m² build. A "warm roof" (solid tiled) is another £3,000–£5,000 above glass. If one quote specifies glass and the other specifies polycarbonate, the £2,000–£3,000 price difference is the spec, not the installer.
-
Check the glazing spec. "A"-rated double glazing is the 2026 standard. Some budget quotes still use "C"-rated units, which lose 30–40% more heat and will cost more to heat. A quote that does not state the glazing rating is a red flag.
For the planning-permission question, the rules around conservatories and PD rights are covered in Do You Need Planning Permission for a Conservatory?.
VAT, payment terms, and contract types
The headline 2026 conservatory prices in this guide are inclusive of VAT at 20%, which applies to most conservatory work on an occupied home. As with loft and extension work, a small subset of projects — conservatories built on a residential property that has been empty for two years or more — can be zero-rated under VAT Notice 708, but that scenario is the exception rather than the rule.
Most national conservatory installers in 2026 offer a deposit-and-stage-payment structure. A typical split is:
- 10–15% deposit on contract signing.
- 30–40% at the base completion stage (after the foundations and dwarf walls are built).
- 25–30% at frame completion.
- 10–15% on practical completion and snagging sign-off.
A 25% deposit is a red flag. A reputable installer will not ask for more than 15% up front, and a higher deposit is usually a sign of cash-flow pressure rather than commitment to your project.
Some installers also offer a "supply-only" package at a 30–50% discount on the headline turnkey price. Supply-only is genuinely cheaper, but the homeowner takes on the responsibility for the base build, the installation, the building regulations application, the FENSA certificate, and the insurance-backed guarantee. For a one-off homeowner project, a turnkey quote is almost always the better deal even at a 30–50% premium.
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.