Robin Nesting in my Shed

That's lovely :o)
How high above the ground is the nest ?

Nest is only about 4' of ground in our old shed, the nest is in a blue bucket inside an old green mower grass box. The Robin has been very busy in my garden last couple of weeks, it waits a few feet away from me as I weed and then flys in to get a worm and back to the old shed, seconds later it's back out again doing the same thing. Very busy little Robin.