Not surprising given the slope of the block though, and the quote also includes thickening in the center for a hoist.
Here's the current costs for the shed:
|Variation – 5.1m w roller door||$385.00|
|100mm slab, f72 mesh, 12of 300x300x300 footings, 15x7m||$8,525.00|
|Power to shed/sub board||$1,750.00|
I should point out this includes only a single GPO and a light. Other power and lighting will have to be added later.
We could build it ourselves, but then we need to register as an owner builder, apply for a building permit for the shed separately, and if we sell within I believe 7 years we have to warrant the construction of the shed up to 7 years from when it went up.