If you're like most people, you probably vacuum regularly but rarely think about a professional clean. So how often is often enough? The general rule For most homes, once a year is the minimum. But depending on your situation, you might need it more frequently than that. Pets Pet hair, dander and the occasional accident means pet owners should be looking at every 6 months. Odours especially build up in carpet fibres over time and a vacuum simply won't shift them. Kids Similar