We recently used Plus Rooms for a kitchen extension to a Victorian terraced house and can highly recommend them. Having a project manager with oversight of the process made a big difference, and the builders were very efficient and completed to plaster finish in 9 weeks against a planned schedule of 8 weeks (over the winter too, so we were impressed). The builders were polite (to us and our neighbours) and very tidy and there was no smoking or loud music on site. We lived through the works and expected it to be very disruptive but it was not as bad as we had expected. It helped having a false door put at the base of our staircase to protect against dust and cold. The quality of finish on the build has generally been excellent.