The report is based on the utilization wastes like bottom ash from waste to Energy Plants, sludge from STPs/CETPs and drain silt for development of building products like paving blocks and bricks by cold process. The paver blocks and cement bricks have been developed and tested as per Indian standard using OPC as a binding material. The Toxicity characteristics Leaching Process (TCLP) studies has also been carried out as per USEPA for field applications of the products developed.