Covering a Concrete Backyard in London: Dry Well vs. Removal

Drilling drainage holes in 18×15-foot concrete, then building raised beds over it, costs more than jackhammer removal. Holes clog; shallow soil stays wet. Rent a jackhammer and sledge—break into 12-inch pieces, haul in a day. Waste container ~$1.50/sf US. You'll gain real soil depth, drainage, and planting success.

London rain demands real drainage. Removal is faster, cheaper, better.