That would require a 'global-extermination' of all cockroaches. Ya see Timmy, all they do is look for dark, closed-in spaces that are near a food source. By the way, have you ever heard that they could survive a nuclear world war? Pretty cool huh?
There are various ways you could permanently get rid of cockroaches. One of the common methods used in our homes is spraying chemicals all around the house. Another method that is also good for getting rid of cockroaches is by mixing borax and sugar together in equal parts and then applying it along the baseboards where these insects are seen most of the times. When the roaches consume the mixture, it damages both their digestive system and their outer skeleton, thus resulting to death.
Permanent is a tall order. Once you've completely rid your home of them, you will still need to take preventive measures to keep them. This means keeping your home clean and dry and applying chemical barriers around your home. Even with all of that, you may not be able to keep your home 'roach free if they are coming from a neighbor (through walls if youre in an apartment). Good luck!
I like to stay away from harsh chemicals so I like to use diatomaceous earth and boric acid. Oh, and sometimes my foot, hand, or any type of projectile that I might hit them with. I don't want to expose my two kids to harsh chemicals. I found http://how-to-get-rid-of-roaches.net to have some helpful information. Good luck all!