There are basically two types of pest control.
One is termite and the other is let's call it all other non termite.
Termite is pre treated prior to building and building your home. Thereafter it is an annual inspection and an annual fee. Cost is some where above $100 and can be as high as $200 for the larger Premier homes.
The all other is a maintenance mode prevention that varies by supplier. There are annuals, quarterly and monthly. One just has to make a determination which is most effective for your life style. Annual programs around $250....monthly runs around $20 per month. They typically treat the outside with the theory of creating a barrier around the home. It is usually effective. If psets are seen in the home they will come back and treat the interior as required. For example we had a small episode of "ghost ants" in the house and our provider made as many follow up calls and treatments inside until cured.
Many companies do both the above. When looking for termite prevention make sure you choose one that has structural replacement inclusined in the coverage.
As far as necessary.....an un equivical yes. In this climate pest are prevalent.
My sister decided against using a service and doing her "own thing" when she saw a bug or something. After 6 months she was on a service program.
Good luck.
BTK
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