Cost of double story extension

[Ilovechocolatetoomuch]

Hi.
We are in the south. Hoping to complete a double story extension about 4 m deep by 7 m wide.
It will include knocking down existing back wall, extending two bedrooms, replacing the kitchen and adding an ensuite.
Any idea of a rough costing?

We found that a very rough guide just for the basic shell was £2k per square metre, plus VAT. That was for general electrics, plumbing, heating, windows, plastering etc. Internal fit out including kitchen / bathrooms / flooring / decoration / bifolds / garden (it will get trashed) on top of that.

South East here. Our extension 14.5 x 26 foot, kitchen in the downstairs bit, master bed, walk in wardrobe, ensuite in the upper part. About £105k. This included the flooring, the kitchen and the ensuite fittings

Thanks guys. I would love to do it for just over 100k but am realistic (I hope)

Like anything it depends on the spec and how much time you can dedicate to searching for deals / more competitively priced versions of the dream kitchen / ensuite etc. It also depends on keeping to the agreed plans / quote and not adding more expense as you go along.

As a surveyor, I usually advise between £140 and £170 per square foot of the worked on area excluding VAT, professional fees and kitchen/bathroom finishes. Hope that helps!

If you'd like a more detailed answer, I run a Facebook Group where you can find this information out: www.facebook.com/groups/homerenovationcommunity/