No, mold is not necessarily a deal breaker when buying a home. Mold can often be treated and remediated, so it's important to evaluate the problem's extent and determine whether it can be managed. Depending on the location and severity of the mold, you may be able to negotiate with the seller to have them take care of it. Ultimately, it's up to you as the buyer to decide if the mold in a home is something you're comfortable living with.