Dear all, I am currently doing an A & A works for my single storey inter-terrace house. My ID firm did all hacking and this week, they are supposed to do plumbing works. He told me that due to the need of a new IC, his quotation for plumbing changed...to 3 times the original costs! He did not highlight this need previously and now he said that due to the additional toilet that I am doing, I must have the new IC. I am most unwilling to pay him this amount as my PE mentioned that it was not possible for the price to increase by 3 times. Now I am stranded and I think he is banking on my urgency for the place to be done. He told me to find my own plumber which needed time. Can anyone please help me out. Can anyone please recommend reliable plumber. Thank you soooo much.