What is the 2026 benchmark for 2.5m × 2.5m (6.25m²) Small Conservatory Roof Replacement Cost?

In 2026, the verified benchmark range for 2.5m × 2.5m (6.25m²) Small Conservatory Roof Replacement Cost is £3,450 – £4,650 (U-Value 0.15 W/m²K). Key specification factor: 2–3 Days Turnkey Fit Including Plastered Ceiling & LABC.

Can I calculate my exact figure online without a phone wall?

Yes. Use the interactive calculator on this page to model your exact figures immediately on-screen before optionally requesting quotes or downloading the PDF Audit Dossier.

Home/Specialist Calculators/6.25 m² Internal Area

2.5m × 2.5m (6.25m²) Small Conservatory Roof Replacement Cost

Verified 2026 benchmark specification: £3,450 – £4,650 (U-Value 0.15 W/m²K) — 2–3 Days Turnkey Fit Including Plastered Ceiling & LABC. Run your exact numbers in the interactive calculator below with zero phone wall.

2026 Benchmark Range£3,450 – £4,650

Technical / Statutory SpecU-Value 0.15 W/m²K

Reference Classification6.25 m² Internal Area

Interactive Estimator (2026 Building Regs Part L Compliant)

UK Conservatory Roof Replacement Cost Calculator

Instant supply and turnkey installation estimates for Guardian Warm Roofs, SupaLite, solar glass, and polycarbonate.

1. Conservatory Floor Area:(e.g., 3.0m x 3.0m = 9m², 3.5m x 4.2m ≈ 15m²)15 m²

6 m² (Small Lean-To)15 m² (Average Edwardian)32 m² (Large P-Shape)

2. Conservatory Geometry & Style:

3. Replacement Roof System:

4. Internal Ceiling & Lighting Finish:

5. Roof Windows (Velux / Fakro Ventilation):

6. Statutory Building Control Regularisation:

Interactive CAD Structural & Thermal Schematic

Live Roof Geometry (15m²) & Part L Cross-Section (0.15 W/m²K)

Style: EDWARDIAN

TOP-DOWN RAFTER & HIP BLUEPRINT4.5m × 3.4m

CLICK LAYER TO INSPECT BUILD-UPU-Value: 0.15 W/m²K

Pre-Engineered LABC Ring-Beam Frame + Celotex / Kingspan High-Density PIR

Core Part L Thermal Barrier (Target U-Value: 0.15 W/m²K)

Turnkey Fitted Benchmark Estimate

£6,910inc. VAT & fitting

Estimated range: £6,565 – £7,463 depending on regional survey.

Visual Cost Split Breakdown100% Turnkey

Frame & Slates: £5,100

Plaster & LEDs: £850

Roof Windows: £580

LABC Building Regs: £380

Thermal Efficiency & Winter Heat RetentionU: 0.15 W/m²K

Old Polycarbonate (2.4 W/m²K)High Heat Loss (~25% retained)

Solar Control Glass (1.0 W/m²K)Comfortable (~62% retained)

Selected System (0.15 W/m²K)94% Heat Retained (90% Less Heat Loss)

ALREADY HAD A QUOTE? INSTANT 2026 OVERCHARGE AUDITOR

Check If Your Quote Is Overpriced — And Beat It Today

2026 Direct Trade Benchmark (3m × 4m Solid Tiled Warm Roof (12m²)):

£5,650

1. Enter the Price You Were Quoted (£):

2. Who Quoted You? (Optional):

OVERPRICED SHOWROOM QUOTE (+73% MARKUP)Est. Direct Trade Savings: £4,150

Warning: This quote carries an estimated £4,150 salesperson/showroom commission markup above verified 2026 direct trade rates (£5,650).

Consumer Contracts Regulations 2013: Signed an overpriced conservatory roof contract at home in the last 14 days? You can cancel penalty-free and book an LABC-certified Guardian/SupaLite installer for 35% less.

Self-Serve Buyer Audit Pack (No Phone Calls)

Solid Warm Roof Structural & LABC Building Control Audit Pack (PDF)

Avoid illegal "clad-over" roof scams. Download our itemised timber/aluminium frame vs Tapco/Metrotile cost breakdown, 0.15 W/m²K insulation spec, and LABC Building Control checklist.

Complete Structural Removal vs Dangerous "Clad-Over" Red-Flag Inspection Guide
Itemised Trade Cost Breakdown: Pre-Engineered Timber/Aluminium Ring-Beam, PIR Insulation & Lightweight Tiles
LABC / JHAI Building Control Regularisation & Conveyancing Certificate Checklist

Instant PDF Pack£9.99

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