Once they conduct the initial treatment, you can expect to see a reduction in ant activity in your home in a few days. However, remember that ants are a stubborn pest; hence, it will take up to at least two weeks to get the problem fully resolved. Even worse, in the case of ant species like pharaoh ants, it may take several months and up to a year. Hence, when you detect an infestation, hire a pest control for ants professional immediately to solve the problem and take less time to treat the problem from the root.