Extension Cost Calculator

In a few simple steps, our extension cost calculator will give you a quick idea of your extension cost or loft conversion cost

Customisation options

Your cost breakdown


Customisation options


Overall finish quality

Low-end
Low-end
Mid-end
High-end
2040
2520
3000

Number of kitchens

5000
15000
30000
-
1
+

Your cost breakdown


15
Professional fees*
(15%)
Labour and build cost
Kitchen products
40
80
110
Windows and doors
20
40
60
Heating
50
110
160
Decor and finishing
10
Contingency*
(10%)

Total cost estimate (inc VAT)

£0

This is a high level estimate and should be used as a guide only
Continue to Budget Tool

Our extension cost calculator has been designed to give a handy indication of your extension cost or loft conversion cost.

You can update our budget tool as you go with detailed quotes from professionals and suppliers based on the detail of your renovation.

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