AS it cost me 4 quid to arrive at the front door it will be no less that 12 quid for even just one window. I find it amazing how prices can be based on bedrooms in a house as there might be 1/2/3 receptions rooms a study and a few hallways and landing never mind the difficulty factors of the clean. Then to justify by saying it only took 20 minutes to do ignoring that it could take 40 minutes to get there to the address. If you can work fast should your customer score by a cheaper price or if there are more customer in the street or not. I work on every house is a 30 minutes job if it take less I score, If its longer then I price more.