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.
I will post some pictures in due course but I have just finished a 6m x 3.5m brick built extension with 2 roof lanterns and a knock through for about 45k give or take. that included fitting the kitchen too.
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.