The cost falls between $25 to $75 per room for carpet cleaning, or an average of $51 per room. Larger whole house cleaning projects can cost more than $550. Homeowners often wonder how much they should expect to pay for carpet cleaning, and how to know whether they're being overcharged. Going the DIY carpet cleaning route with a carpet cleaner rental may be tempting, but to keep your carpets looking new and minimize wear and tear, sometimes it's best to hire professional carp