What a Conservatory Roof Replacement Costs
Four UK publishers price this job. They agree on the floor to within five per cent and disagree on the per square metre rate by nearly two to one. Here is the reconciled number, and exactly where the disagreement sits.
Tiled or solid roof · 3m × 3m · installed, inc VAT
£6,000 to £11,000 typically £8,075
Well evidenced4 sources · floor spread 1.05× · ceiling 1.29× · checked 20 August 2026
Price your job in six questions
No phone number until the final step, and no email needed to see an estimate.
Price your roof
Six short questions. No phone number until the last one.
How much does a conservatory roof replacement cost?
Installed, including VAT, and including removal of the old roof, the insulated system, structural fixings, the internal plastered finish and guttering where it is replaced.
| Conservatory size | Low | Typical | High | Sources | Evidence |
|---|---|---|---|---|---|
| 3m × 3m (9 m²) | £6,000 | £8,075 | £11,000 | 4 | Well |
| 3.5m × 3.5m (12.25 m²) | £7,350 | £9,188 | £11,025 | 1 | Thin |
| 4m × 3m (12 m²) | £7,500 | not published | £10,500 | 1 | Thin |
| 4m × 4m (16 m²) | £8,000 | £10,700 | £14,400 | 4 | Well |
| 5m × 5m (25 m²) | £10,700 | no defensible typical | £20,000 | 2 | Reasonable |
Sources: four UK cost publishers, dated 2026, July 2026, a page from March 2026 with a price table from December 2024, and one undated, which is capped at thin evidence for exactly that reason. The typical is the median of five sourced point estimates, not the midpoint of the band.
Why 5m × 5m has no typical figure
The only two publishers who price a 5m × 5m roof do not agree on a single pound: the higher publisher's floor (£12,000) sits above the lower publisher's ceiling (£11,200). We publish both bands and no midpoint, because a midpoint here would be an invention.
Why the rate falls as the roof grows
The per square metre rate drops roughly 35 per cent from the smallest band to the largest, because scaffolding, mobilisation, building control and disposal do not scale with area. That is why we price by size band and never multiply a rate by your square metres.
Why published per m² rates disagree by four to one
Across usable publishers the range is £460 to £900 per m², typically about £650. Two widely cited figures are excluded, and both exclusions are worth understanding before you compare quotes.
| Publisher | Rate | Status | Why |
|---|---|---|---|
| A UK quote comparison site, July 2026 | £460 to £850 | Used | Banded by size, and the only source showing the rate falling as the roof grows |
| A UK price guide, 2026 | £480 to £890 | Used | Composite tiles. Slate and clay priced separately at £600 to £1,200 |
| A national trades directory, body copy, March 2026 | about £750 | Used | Sits inside the reconciled band |
| The same directory, on-page estimator | £195 | Excluded | Contradicts the same page's own body copy by 3.8×. A live data bug, not a cheaper market |
| A UK trades marketplace | £50 to £100 | Excluded | Tile material only, published under a roof label. Ten times below every other source |
Reconciled band £460 to £900 per m², spread 1.96×, three usable publishers. The typical of £650 is derived and labelled as derived. Checked 20 August 2026.
Will your existing frame take the load?
No website can tell you. LABC's own guidance puts the added load from a lightweight solid roof at about 0.5 kN/m, less than ten per cent over a typical translucent roof, and says the real risk is whether your existing mullions contain steel reinforcement. A magnet test or a pilot hole settles it. Nothing else does.
If they do not, reinforcement is £800 to £4,000, and that band is wide because two publishers disagree by 3.75× on the floor. One is pricing reinforcement of existing frames, the other replacement. Both are real outcomes of the same survey.
| Excluded from the headline band | Range | Evidence | Note |
|---|---|---|---|
| Building control approval | £200 to £800 | Reasonable | Two publishers disagree 2× on the floor. One appears to price the application, the other the inspection regime |
| Structural reinforcement, if needed | £800 to £4,000 | Reasonable | Conditional. Only a survey decides which end applies |
| Scaffolding | £400 to £800 | Thin | Publisher attribution being re-checked before we treat this row as settled |
| Roof window, fitted, each | £450 to £1,200 | Thin | 2.7× spread, and it is one publisher contradicting itself |
A sourced warning, not a sales tactic. Ultraframe, who manufacture these systems, say a tiled roof quote under £6,000 is probably a cladover rather than a true solid roof. We use that as a warning, never as a price.
Get quotes on this roof
Answer six questions and up to four local installers can call to confirm the details and arrange a free, no obligation survey or quotation. That visit is the only thing that can tell you whether your frames are steel reinforced, and it is the commonest reason a tiled roof quote changes.
- No obligation
- Out of area? We tell you, and you still get the estimate
Questions people ask first
Can I get a grant for a new conservatory roof?
How much does a proper conservatory roof cost?
Is a new conservatory roof worth it?
Who signs the work off?
Sources for this page: four UK cost publishers (2026, July 2026, a page from March 2026 with a table from December 2024, and one with no date), Ultraframe (1 May 2024), LABC guidance. Last checked 20 August 2026, next check due 20 November 2026.
Find out what yours costs
Six questions, about sixty seconds, and an estimate built from published UK figures with every source shown. Then up to four local installers can quote you, if you want them to.