Beam & Brick

Garage conversion costs

A practical introduction to the factors that influence garage conversion pricing in the UK.

How much does a garage conversion cost?

Garage conversion costs vary significantly because no two properties or specifications are identical. Size, structure, insulation, windows and doors, heating, electrics, plumbing, finishes and professional fees can all change the final price.

Use online figures as a starting point only. A meaningful quotation requires a contractor or relevant professional to understand the existing garage and the proposed specification.

Main factors that affect garage conversion cost

Single, double, attached or detached garage
Condition of the existing floor, walls and roof
Replacing the garage door with masonry, glazing or a new entrance
Insulation, damp protection and ventilation
Electrical work, lighting and heating
Plumbing, drainage or bathroom facilities
Structural alterations and new openings
Flooring, joinery, decorating and final specification

Allow for more than the building work

Your overall budget may also need to cover building control charges, drawings or professional advice, decorating, flooring and a contingency for unexpected conditions discovered during the work.

Compare quotations on the same scope

When comparing contractors, make sure each quotation includes the same work and specification. A lower headline figure can be misleading if insulation, flooring, decoration, waste removal or certification are excluded.

Read about planning permission and building regulations →

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