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Depends where you are & the spec you're after but we're in the middle of a D&B c3m x 5m extension, knock-through & new kitchen in London - 150k was the very punchiest quote we got which we took for them just not wanting to do it. Most of the others were in the 80-120 range.
Also despite having a project manager, you do also have to do a hell of a lot of project managing anyway - the building co PM essentially just buys the stuff & makes sure the labourers turn up.
It balancesd things a bit, but if we are talking about 40 sqm of surface, part of it being refurbishment, we still are at 3.75k per sqm. still very high