Patio replacement - Landscape Gardening job in Bury St Edmunds, Suffolk

Job description

I have a patio area approx 10m x 4m, partly paved and in need of a facelift. The paved area sits 30cm above the level of our lawn and I have a shed at on end. I have two options for renovation:
1. replace the existing paving slabs with brick or similar surface and set the entire area at the current level.
2. take the level down to the garden level and rebuild the patio.
For either option I would need to remove some rubble, build a side retaining wall on my boundary and erect a small retaining wall (probably wood) at the back of the patio for the existing flower border and boundary wall.