Patio drainage problems

[blueflyingtonight]

I have a concrete patio about 20 sqm. There is a vertical concrete margin (about 20cm) that separates the patio from a raised lawn. There is no drainage on the patio and when we have a deluge the patio floods and water runs off under the back door of the garage. The guttering from a single storey extension and the garage feeds a water butt that overflows onto the garden border via a fairly heath robinson arrangement of pipes. Can anyone advise me on how best to address the flooding problem?

Initial thoughts - have the concrete lifted, install soakaway and then lay a patio using flags or block paving with a suitable drain into the soakaway. Thinking of extending the patio by taking a chunk out of the raised lawn.

Any ideas of how much it would cost top have this work done?

Thanks in advance.

Steve

[Pablo]

Ideas of cost no chance without seeing it. How long is a peice of string etc. My advice would be to tidy the pipes up rip out the concrete get the water going to the right place allow for 1 or 2 gullys to remove new patio water or a linear channel. Then pave to your your little hearts content. If you want a soakaway then you need decent draining soil and it can't be sited near any foundations.