Hi can anyone tell me the foundation for a 60f by 14f out building with block 7.n 215

Hi the foundations will be to building spec and that is 450mm wide and a minimum of 900mm deep with complete trench fill that is acceptable for a 215 wall hope this helps

Concrete base with the edge deeper to take the weight of the walls also you could add some A142 reinforcing mesh for added strength

i would personally look at a rein raft foundation, that way the floorslabs poured at the same time.

Nothing wrong with the full fill option. I've only used that on sandy ground. On clay I would use 225mm deep concrete, build up the rest of the way with concrete blicks laid flat . Off the top of my head I think the full fill concrete is more than twice the expense, but is quicker , pros and cons yeah . Might need a pump for concrete if access is an issue, more money 🙁