Independent UK guidePrices updated September 2026

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T-shape conservatory new polycarbonate roof cost

Reviewed byZaib Khan
Updated onSeptember 2026

A new polycarbonate roof on a medium T-shape conservatory typically costs £3,900 to £6,100, fitted.

Small£3,800£2,800 to £4,700
Medium£5,000£3,900 to £6,100
Large£6,300£5,000 to £7,500

A T-shape has a wide lean-to or Edwardian section along the house with a projection sticking out from the middle, often with its own Victorian or gable front. These are usually the largest conservatories and the most complex roofs.

New polycarbonate roofs on a T-shape conservatory

Polycarbonate keeps costs down on a big roof, but a large T-shape under polycarbonate is the classic too hot, too cold room.

  • Two valleys, several hips and long gutter runs make labour the biggest part of the price.
  • Large glazed floor areas get very hot under polycarbonate or glass, so these rooms benefit most from a solid roof.
  • Bigger roofs are more likely to need structural calculations and extra posts.

Price by size

SizeLowTypicalHigh
Small up to about 3m x 3m£2,800£3,800£4,700
Medium about 4m x 3.5m£3,900£5,000£6,100
Large about 5m x 4m or more£5,000£6,300£7,500

Other roofs for a T-shape conservatory

RoofMedium T-shapeBest for
Tiled roof£10,900 to £15,400Using the room every month of the year
Glass roof£5,100 to £8,200Keeping the light and the view of the sky
Hybrid roof£9,600 to £14,800Warmth with pools of daylight
Insulated roof panels£2,600 to £5,400A warmer room on a tighter budget
Orangery conversion£14,000 to £35,000A full extension feel without building a new room
Old glass roofStandard double glazing, the typical before
New polycarbonate roofThe lowest cost fix for a leaking roof
Tiled roofUsing the room every month of the year
Glass roofKeeping the light and the view of the sky
Hybrid roofWarmth with pools of daylight
Shorter bars on both sides mean a steadier room. Solid bar is the best published figure, pale bar the range across grades and tints. U-value in W/m²K; solar is the g-value or solar transmission. Figures from maker data (Ultraframe, Thermotec and others); hybrid and orangery are estimated from their solid and glazed areas. How we built this.

Extras to budget for

New fascias and guttering£150 to £775Most solid roof systems come with their own gutter and fascia.
Removal and disposal of the old roof£120 to £800Usually included. Skip hire alone is about 120 to 300 pounds.

By region

Questions

How much is a new polycarbonate roof on a T-shape conservatory?

A new polycarbonate roof on a medium T-shape conservatory typically costs £3,900 to £6,100 fitted, with most quotes near £5,000. Small T-shape conservatories start around £2,800, and large ones reach about £7,500.

Why does a T-shape roof cost more than other shapes?

Two valleys, several hips and long gutter runs make labour the biggest part of the price.

What should I check before choosing a new polycarbonate roof for my T-shape conservatory?

Polycarbonate keeps costs down on a big roof, but a large T-shape under polycarbonate is the classic too hot, too cold room.

How long will it take?

Expect 1 to 2 days on a medium T-shape conservatory, and a day or two more on this shape if it is large or needs frame work.

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