foundations for a shed

Hello everyone! We've had a garden office put in and are unsure if what the guys have done will last or not. There are already several cracks in the concrete and bits that are over hanging. I'm no expert at this but it doesn't feel like it's been done properly so would be great to get someone...

Hello, I need some advice regarding building brick,concrete and thermalite blocks. I have done a rough plan for my shed as shown below. How deep should the foundations be? Does a Council inspector have to come and check the depth? Does the height of 290cms, comply with building regulations as...