Can anyone provide a rough rule of thumb to calculate the cost of adding an extension, either single or two storey, to an existing house. Per sq ft or m2 whatever. I realise any such rule of thumb would be very rough but it would suit my needs.
Can anyone provide a rough rule of thumb to calculate the cost of adding an extension, either single or two storey, to an existing house. Per sq ft or m2 whatever. I realise any such rule of thumb would be very rough but it would suit my needs.
£1000/sq metre.
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