Why small moves still run over
In Shoreham, the extra cost usually appears when the job takes longer to handle than the original description suggested. That might be because the van is parked farther away, because the entrance is slower to work through, or because the timing window is poorly chosen against school traffic, bridge pressure and weekend seafront movement.
None of that looks dramatic on paper, but it adds up quickly on a smaller job.
The local details people underestimate
riverside streets, older town-centre roads and seafront flats change the pace of a move in ways that are easy to miss at the quoting stage. So do flats, maisonettes, older houses with steps and longer walks from modern parking courts, especially when the largest items need more space, more turns or more trips than expected.
The hidden cost is usually time, and time is what changes the total.
How to avoid the avoidable extras
Flag long carries, entry systems, awkward furniture, resident parking restrictions and any part of the route that will break the move into smaller cycles. Clear detail lets the driver price the real job rather than a simplified version of it.
That is the easiest way to stop the day drifting into avoidable overtime.