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Costings

How much will my extension cost?

This is the question clients want to know to start planning a new project use our tool to get a price and ideas for your future home.

Please note these prices include VAT and all components like electrics, doors & windows

House Type

Extension Type

Loft Conversion

£100,000

FLAT ROOF

ESTIMATED COST

FLAT ROOF

3m x 3m Rear Extension

£90,000

PITCHED FLAT ROOF

ESTIMATED COST

PITCHED FLAT ROOF

Small Rear Extension

£130,000

PITCHED ROOF

ESTIMATED COST

PITCHED ROOF

Large Extension

£80,000

GABLE ROOF

ESTIMATED COST

GABLE ROOF

Medium Size Extension

£75,000

CROWN ROOF

ESTIMATED COST

CROWN ROOF

3m Rear Extension

£120,000

FLAT ROOF

ESTIMATED COST

FLAT ROOF

Small Side Return

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£100,000

ESTIMATED COST

FLAT ROOF

3m x 3m Rear Extension

£90,000

ESTIMATED COST

PITCHED FLAT ROOF

Small Rear Extension

£130,000

ESTIMATED COST

PITCHED ROOF

Large Extension

£80,000

ESTIMATED COST

GABLE ROOF

Medium Size Extension

£75,000

ESTIMATED COST

CROWN ROOF

3m Rear Extension

£120,000

ESTIMATED COST

FLAT ROOF

Small Side Return

Other example costs

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