I've started planning with sketches and in my mind to build a 15 square meter shed this summer, which is now allowed without a building permit. I have an area where I plan to build according to measurements 2.6 m x 5.6 m. The only issue before I can start is that I live on a rock and where I intend to build my shed, there is little more than 20-30 cm down to the rock. The question is, what is considered by those knowledgeable here on the forum about placing the shed on concrete blocks instead of piers. It will be a tough job if I have to "drill" into the rock to install piers or pour concrete into the rock. I can dig down to the rock and fill with crushed stone, "road gravel" and the like on top, then place concrete blocks and build joists on these. It is not a windy area, so I'm not afraid it will blow away, but what other pitfalls might there be with building a foundation in this way?
Thanks for any input on this subject as it's the only thing holding me back from starting.