Roger wrote:
Hi All
I want to raise our patio so it reaches up to the patio doors we had fitted.
We don't want to use decking.

As far as I can work it out, I'll build a retaining wall around the intended
patio area, fill it with rubble and crushed hardcore then lay slabs on top.

It will need to be four or five feet high.

Decking?
You could even have a storage area under it.