It depends on your construction and building size.
Houses built on a slab are usually cheaper. If you have hidden areas, stucco over block, well water, carpet or tile in a clubbed basement, these can all add to the price. If you have damage and an active infestation, treatment should be commenced immediately! Either way, you should get a lifetime warranty to cover re-infestation that covers any damage from such infestations. They usually charge about $100 per year for the annual inspection to keep the lifetime warranty in effect.
-DAK-