Whole houses take about 2 to 3 hours. 3 areas take 1 to 1.5 hours. But, we usually book out 3.5 hours for a whole house to factor in travel, which is a big chunk of the day to set aside and why we really, really, really need at least 24 hours notice for cancellations. As a practical matter, we have become pretty gracious about rescheduling on short notice. We don’t charge a cancellation fee unless you don’t call ahead and don’t answer your door.