A builder estimated a smallish job (some external repairs to brickwork). I asked him how many men would be required and how long the job would take. He told me that the job would take three days and require two men. The overall estimated cost was reasonable based on hiring two men for three days. The job was completed, but in fact, it only took the contractor two days to complete. The builder has now sent in the bill for the full amount (based on three days work). If they’d originally said the job would take two days at the rate they’d estimated, I would have said it was expensive and negotiated the cost. However, based on their projected manpower/time required, it was a reasonable estimate. Should I ask for him to knock some money off the final bill or ask for the two guys to come back and work an additional day on other tasks? Any advice on how to handle this situation would be gratefully received. Thanks.