Structural removal is where the bees are inside a structure like a house or garage and there may be a swarm or hive but you can’t tell because the bulk of it is hidden inside a structure, perhaps behind a dry wall or up in the beams. We really don’t recommend attempting structural removal as there is a really high chance of getting it wrong, upsetting the bees and thereby hurting them and yourself, and the cost of repairing structure and mistakes typically adds up to more than the cost of calling in a beekeeper. Besides, if they’re in a structure the chances are they’ve already been there a while and so a little extra wait doesn’t make so much difference.