Can anyone tell me if these plumbing costs seam reasonable please?   We only received two quotes for the plumbing, one at 27k and the other at 20k.   To me it looks like the majority of the 20k is labour costs, roughly 45 days @ £40 per hour. Would it really take that long?   We are providing all sanitaryware, taps, kitchen + utility sinks, showers, shower screens and upstairs radiators.