Question about roach exterminator (apartments, tenants, move out, complaints)

[lamontnow]

I have a building of ten small apartments. There is no infestation but a hugh roach is popping up fairly frequently. In nine years I have never gotten any complaints but there seems to be an uptick lately. Two tenants have complained, and one is phobic about it. Threatening to move out if something is not done "immediately". I've seen a few in the basement recently. The two apartments with the problem are the two on the ground floor (right above the basement).
Is an exterminator a one time thing or does he have to come on a regular basis?
How much does it cost?
Maybe he can just deal with these two apartments and the basement?

[DowntownVentura]

I am pretty sure that even if you called a local exterminator, he will not quote a price until they come to inspect the building. But, they will come and give a free estimate. I would call a few and ask each what kind of service they provide.

Personally I have not had to deal with that issue but if it were to come up, it would be my top priority. Once it was dealt with, I would consider regular service. I have no idea what that would cost but I would guess $50-$100 per month.