Homeowner Forum / Construction / July 2008

If it's not visible, and you just want to store the lawnmower, set it
on the existing concrete pad and let it lean. Plastic or metal sheds
won't care.

If you're stick-building it, just make the walls taller at the downhill
side. Concrete blocks would probably do, as long as you fasten them
down. Make the uphill side drain around the building so you don't get a
puddle there.

If it's a kit, and you can't alter the walls to match the ground, you
could use concrete blocks to make a level foundation. You'll have the
problem of cutting the blocks to match the grade. You could also shim
up underneath the walls with wood construction, but you'll have to
cross-brace it to make sure it doesn't wiggle.

Due to the height vs. the side dimensions, I would suspect such a shed would
be very susceptible to wind.  That is, topheavy vs a more substantial shed
in terms of ground coverage.  You need a way to tie such shed down at the
foundation.  Along with that, you are unable to store substantial weighted
objects to help with such a problem.  Am assuming you're installing an
independent floor as well.

A  8x12 or so prebuilt only needs 9 concrete block, I would worry on
the uphill part and want it off the ground by 3-6" so rain runnoff
goes under the shed and does not constantly hit it. Or make a water
diversion wall. You could level it with 2" concrete block, but is it a
windy area.