Hi,
I am planning to build a detached garage and in keeping with existing year 1928 house I propose to have it build using concrete blocks. The site has a slight fall and garage entrance will be not much above ground level. The DPC will be somewhat close to ground so that it is not higher than surface level of the slab. Does the 150mm height above ground apply to a detached garage? It seems difficult to achieve 15 cm of height above ground level. I would prefer not to raise slab height.