First and foremost you should just come out straight and question the house seller if there are any problems in pest control.  We get called out to homes all the times by sellers in our pest control San Diego service.They are doing it to satisfy any potential buyers most of the time.So by you asking about it most house vendors will tell you about it and be truthful.

Next thing you want to do is look for any sign of ants. In my ant control San Diego service I always ask my clients to see if there are ants on the outside of the home.  If there are, then there is a good possibility they are in the home as well.You can look for this as well as a prospective buyer.  Look on the outside of the home for any sign of ants.

Lastly you need to be certain that there are no rodent related problems. In my San Diego mouse control service this is another troublesome pest.Because they can multiply faster than rabbits once they have nested in your home.The best way for you to determine the existence of rats or mice is by checking the attics.  You want to look to see if there are mouse droppings. There is a problem if there are.

When buying a new house, hopefully this will help you know what to look for.As mentioned having to get rid of pests is the last thing you want when moving into a new home.