How long does it take to get rid of bed bugs if you hire a pest control company?

It will depend on what kind of service you select and the level of infestation in your home. If you opt to use a chemical treatment, a reasonable expectation would be at least a month until one gets rids of bed bugs. A professional bed bugs treatment is carried out in two phases. During the first phase, the treatment manages to get rid of already existing bed bugs. After the first treatment, the second treatment is done in the next 15 days. Over the course of those two weeks, the eggs laid by the bed bugs hatch and it is important to get rid of them too, hence the second treatment is necessary. Therefore, bed bugs treatment is carried out in two phases. Depending on the infestation level, it may take a shorter or a longer time. A best case scenario would probably be closer to two weeks to be bug free if you have a light infestation amount. 
 
Heat is the preferred option if you want the job done quickly. If you opt for a heat treatment, the majority if not all bed bugs should be gone immediately. Usually, a pest control company will also use a pesticide backup to get any stragglers