Contractors Development Institute (CDI) is a constituent unit of NAC parented by Builders Association of India, A.P. Centre. CDI is a unique training institute  in entire Asia established in the year 1999, to train Contractors, Builders, Engineers, Architects, Technical, non-Technical staff in  Managerial, Financial, contractual, Techno-legal and commercial etc., to professionalize the business of contracting in Construction  Industry.

CDI has trained  more than 5000 candidates in the above areas from the day of  its inception and also conducted and conducting many workshops and seminars on burning problems like VAT (Sales Tax on work Contract), Provident Fund, ESI, Labor laws, Contract Act, Arbitration and latest technology in construction industry from time to time.
It is recognized by state, central government and construction industry throughout India.