landscaping works to rear garden

We are in the process of carrying out a large landscaping job in Leighton buzzard, where we have been instructed to lay a large blue slate patio approx. 30sq mtrs in total and build block built planters which will be rendered to give a Mediterranean finish. we have also got to construct a snug type building using oak frame with a pent type roof with a deck floor. we have got to also build sleeper walls to create raised beds for a vegetable garden. We have also been instructed to create a pond area as part of the main works.