Remodel ran long. Can I keep the driveway porta potty another month?
We're six weeks into a bathroom remodel and the contractor just said we need another four weeks before the house toilet is usable again. We already have a standard unit on the driveway with weekly service visits baked into the monthly rate.

The original quote was for two months. Nobody mentioned what happens if we just keep it. Does the rental company roll us into another month at the same rate, or do they write a new contract and re-quote delivery?
The pad is still level asphalt and the vacuum truck can pull straight in from the street. I'm fine paying for another month of service. I just want to know if I need to call them before the pickup date they already put on the calendar, or if they assume we want it gone when the original term ends.