When you interview a maid or service, you'll have a discussion about your cleaning needs. This will include information about how many bathrooms you have and how many levels comprise your home. You'll be given an hourly rate and an estimate. If you schedule a cleaning and it takes longer than the estimated time to complete, you'll pay more -- sometimes substantially more --than you anticipated. This is politely called underestimating the work involved, but it may actually be a calculated strategy to get your business by misrepresenting the cost of the cleaning. To avoid sticker shock, invite the maid or cleaning service representative to your house for a walk-through and in-home quote. It will be harder to justify a big upcharge if you make your needs clearly understood beforehand.