T i m wrote:
We had some proper heavy 'Shifting skates', that assuming the surface
was good enough would allow you to left some really heavy weights very
easily (Dad was in the lifting gear game for a while). ;-)

We have also moved some heavy stuff on wooden rollers (round fence
posts), but the problem you may have is getting the shed up high
enough (without damaging it) and keeping control of it whilst doing
so.

I thought about sliding it on something slippy... plastic boards or
something. Although it would need some means of exerting force on it -
isn't so easy to push as it's in a corner.

What is the actual shed made of as that can make a big difference re
how much distortion it can take? If it's plastic panels with a wooden
floor then you might easily stress the fastenings. Also, what are the
slabs resting on, just earth?

It's all wood, except some polycarb for the window which can probably be
taken out. I think the slabs are just resting on earth, although I can't
tell because they're underneath the shed

If the whole structure is reasonably strong, strong enough to be
listed up by one edge, a few long levers along one edge allowing you
to get some timber under the bearers (assuming there are any) might
give you a start?

I did wonder about some kind of pulley/ratchet arrangement, but there's
nothing secure enough to attach the pulley to.

Theo