Approximate costs

Although each project we undertake is unique and all have their own nuances with associated costs, we have put together a variety of buildings with approximate sizing and costs to give you an idea of where to start with your project.

Estimated Cost

Detached house

Estimated Cost:

£52,000

Detached property

Flat Roof

Medium Smaller Rear Extension
3m x 5m

Estimated Cost:

£128,000

Detached property

Flat Roof

Large Rear Extension
10m x 5m

Estimated Cost:

£138,000

Detached property

Crown Roof

Large Rear Extension
10m x 5m

Estimated Cost:

£184,000

Detached property

Flat Roof

Large Wrap Around Extension
10m around and 4m deep

Estimated Cost:

£204,000

Detached property

Crown Roof

Large Wrap Around Extension
10m around and 4m deep

Estimated Cost

Semi detached house

Estimated Cost:

£50,000

Semi-Detached property

Flat Roof

Medium Smaller Rear Extension
≈3m x 5m

Estimated Cost:

£49,000

Semi-Detached property

Pitched Roof

Medium Rear Extension
≈3m x 5m

Estimated Cost:

£65,000

Semi-Detached property

Gable Roof

Medium Rear Extension
≈4m x 5m

Estimated Cost:

£72,000

Semi-Detached property

Crown Roof

Medium Rear Extension
≈4m x 5m

Estimated Cost:

£72,000

Semi-Detached property

Flat Roof

Medium Side Extension
≈2.5m deep x 8m

Estimated Cost

Double storey extension

Estimated Cost:

£138,000

Semi-Detached property

Gable Roof

Side Extension with Bi-Folds
≈8m deep x 2m wide

Estimated Cost:

£198,000

Detached property

Gable Roof

Side Extension with Bi-Folds
≈8m deep x 4m wide

Estimated Cost

Loft extension

Estimated Cost:

£55,000

Semi-Detached property

Flat Roof

Windowed Loft Extension
≈3m x 5m

Estimated Cost:

£72,000

Semi-Detached property

Flat Roof

Loft Extension with Sliding Door Juliet Balcony ≈5m x 4m

Estimated Cost

Terraced house with small back

Estimated Cost:

£35,000

Terraced house with small back

Flat Roof

Small side return
≈3m x 1m + renovation works inside and steel

Estimated Cost:

£68,000

Terraced house with small back

Flat and Pitched Roof

Side return with 3×3 extension
≈ 3mx 1m and 3mx3m

Estimated Cost:

£75,000

Terraced house with small back

Gable Roof

Side Return Extension
≈5m x 5m

Estimated Cost:

£89,000

Terraced house with small back

Crown Roof

Side Return Extension
≈2m x 2m and 3mx5m

Estimated Cost:

£148,000

Terraced house with small back

Flat Roof

Side Return Extension
≈1.5m x 3m and 3m x 5m

Estimated Cost

Terraced house with medium back

Estimated Cost:

£48,000

Terraced house with medium back

Flat Roof

Small Rear Extension ≈3m x 3m

Estimated Cost:

£82,000

Terraced house with medium back

Flat Roof

Medium Side Return Extension
≈1.5x3m and 3mx5m

Estimated Cost:

£78,000

Terraced house with medium back

Gable Roof

Medium Side Return Extension
≈5mx1m and 3mx5m

Estimated Cost:

£81,000

Terraced house with medium back

Pitched and Flat Roof

Medium Side Return Extension
≈5mx1m and 3mx3m

Estimated Cost

Terraced house with large back

Estimated Cost:

£76,000

Terraced house with large back

Pitched Roof

Large Side Return Extension ≈6mx1m

Estimated Cost:

£91,000

Terraced house with large back

Gable Roof

Large Side Return Extension ≈5mx1m and 3mx5m

Estimated Cost:

£91,000

Terraced house with large back

Crown Roof

Large Side Return Extension ≈5mx1m and 3mx5m

Estimated Cost:

£78,000

Terraced house with large back

Flat Roof

Large Side Return Extension ≈1mx5m