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Price for 2 story extension


5 Answers from MyBuilder Extension Builders

Best Answer

Prices average 1k per square metre, as a rough guide only.
There are to many variations in the building trade, to give a price without making a site visit, and inspection of plans and specifications.
You should get at least 3 prices .
Hi Glyn,
In response to your edited question, the price would include superstructure, roof on, plastered, doors/windows fitted, and skirtings, left ready for decoration, all rubbish removed.
The extra costs would depend on quality of bathroom/kitchen fitments, these items normally have a pc sum allowed.
These prices will vary, according to different areas and availability of work.


Answered 4th Mar 2011

looking at 50k plus for 2 storey this size


Answered 3rd Mar 2011

For just the basic specification - work to £50 per sq ft.


Answered 2nd Mar 2011

prices vary depending where you are ,and whats going into the extension ,prices vary from 1k per square metre and up ,


Answered 3rd Mar 2011

Hi. I agree with substructure on this job. A 20m2 double storey extension would be around £40000+VAT which equates to £48000 but thats only for a basic specification. You could well be looking at more!



Answered 3rd Mar 2011

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