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Cost your conservatory.
Base, frame, glazing and roof — the 2026 trade-price reference for an average UK conservatory.
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Top tips
Hiring a conservatories, without the regret.
Four moves that separate a smooth job from a nightmare.
Cheap polycarbonate roof
Headlines usually quote polycarbonate. Specify glass at minimum; tiled warm roof for year-round use.
Foundation not included
Some quotes assume you'll provide the base. Always confirm whether foundations, dwarf wall and slab are in the price.
Building Regs sign-off
Cheap quotes skip Building Regs even when notifiable. Pay the £200–£500 for proper notification.
Warranty not insurance-backed
A "10-year warranty" from a small installer is worthless if they go out of business. Insist on an IBG (insurance-backed guarantee) — costs the installer £50–£150, protects you.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and a typical week-by-week schedule.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Small lean-to (2.5m × 3m)uPVC, basic
£6.5k–£14k
Medium Edwardian (3.5m × 4m)uPVC, glass roof
£11k–£22k
Medium Victorian (3.5m × 4m)5-facet, uPVC
£12.5k–£26k
Large P-shape (4m × 5m+)uPVC, multi-style
£18k–£45k
Aluminium medium (3.5m × 4m)Premium frames
£18k–£35k
Orangery medium (4m × 5m)Brick pillars, lantern roof
£28k–£55k
!
Quote spread is typically ± 18% — always get 3 quotes.
Timeline
Mid-size conservatory · week by week
Typical
5 phases · 5 wk
5 phases · 5 wk
W1
W2
W3
W4
W5
Foundations + dwarf wall
Frame + glazing
Roof + ridge
Electrics + flooring
Snags + handover
!
Schedule slips on dependencies — pad each phase by 10–20% for real-world delays.
At a glance
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Conservatories explained
UK conservatory quotes vary by a factor of 3–4. Cheap quotes often hide compromises on glazing, foundations, or warranty paperwork. This is a clear-eyed breakdown of honest 2026 UK conservatory pricing. Expect £8,500–£55,000 depending on style, brand and specification.
What Does the Work Involve?
A conservatory build is a multi-trade project: groundworker (foundations), bricklayer (dwarf wall), frame installer (uPVC or aluminium), glazier (glass roof or polycarbonate), electrician (Part P certified), plasterer (internal finishes), decorator. Plus building inspector if Building Regs notifiable. Project management is critical — most cost overruns come from poor coordination.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Small lean-to (2.5m × 3m) | 6,500 | 14,000 | uPVC, basic |
| Medium Edwardian (3.5m × 4m) | 11,000 | 22,000 | uPVC, glass roof |
| Medium Victorian (3.5m × 4m) | 12,500 | 26,000 | 5-facet, uPVC |
| Large P-shape (4m × 5m+) | 18,000 | 45,000 | uPVC, multi-style |
| Aluminium medium (3.5m × 4m) | 18,000 | 35,000 | Premium frames |
| Orangery medium (4m × 5m) | 28,000 | 55,000 | Brick pillars, lantern roof |
| Tiled warm roof upgrade | 4,500 | 15,000 | Add-on or replacement |
How Long Does It Take?
Lean-to or simple Edwardian: 3–5 weeks. Victorian or gable: 4–6 weeks. P-shape or L-shape: 6–10 weeks. Orangery: 8–14 weeks. Plus 4–8 weeks frame lead time from order.
DIY or Professional?
Professional only. Multi-trade coordination, regulated work (electrical Part P, gas-safe boiler tie-in), Building Regs notification, FENSA registration.
Choosing the Right Tradesperson
Big national chains (Anglian, Everest) often quote 30–60% higher than reputable local installers. Get 3 quotes, compare on like-for-like spec. Check DGCOS membership, FENSA/Certass registration, and 10-year insurance-backed warranty (IBG). Avoid cash-only deposits.
UK Regulations
Building Regs exemption rules (under 30 m² + external doors). Permitted development limits for planning. FENSA or Certass self-certification for the frame install.
Common Problems With Quotes
- Cheap polycarbonate roof: Headlines usually quote polycarbonate. Specify glass at minimum; tiled warm roof for year-round use.
- Foundation not included: Some quotes assume you'll provide the base. Always confirm whether foundations, dwarf wall and slab are in the price.
- Building Regs sign-off: Cheap quotes skip Building Regs even when notifiable. Pay the £200–£500 for proper notification.
- Warranty not insurance-backed: A "10-year warranty" from a small installer is worthless if they go out of business. Insist on an IBG (insurance-backed guarantee) — costs the installer £50–£150, protects you.
Frequently Asked Questions
What's the average UK conservatory cost in 2026?
£15,000–£25,000 for a 3.5m × 4m mid-spec uPVC Edwardian or Victorian. Add £4,500–£8,000 for tiled warm roof.
Why are quotes so different?
Foundation included or not, glazing spec (polycarbonate vs glass vs tiled), frame brand, warranty type, scaffolding, decoration, electrical work.
Is a big-name chain worth the premium?
Often not — local DGCOS-registered installers do equivalent work at 30–50% less. Big names have stronger after-sale support.
What payment structure should I expect?
25–35% deposit on order, balance staged: 25% on base completion, 25% on frame up, 15–25% on completion. Avoid deposits over 35%.
Can I finance a conservatory?
Yes — most installers offer 0% finance over 12–24 months. Read terms carefully — APR can spike at end of promotional period.
VAT — is it included?
Quotes should be explicit. New-dwelling conservatories are zero-rated; replacement conservatories are standard-rated (20%). Listed buildings may qualify for reduced rate.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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Keep reading
VIEW ALL CONSERVATORIES GUIDES →More conservatories guides.
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