The Census Bureau has been involved in a major research effort directed towards the expansion of administrative  records utilization since 1996.   We have begun the prototyping of a Statistical Administrative Records System ( StARS) to combine several major federal administrative records systems such as the IRS individual tax returns and information returns, HCFA Medicare enrollment data, SSA Numident information, HUD Tract Rental Assistance Certification System, Indian Health Service, and Selective Service files.  We have been researching several other federal  micro and aggregate data files for Census Bureau statistical uses.  This paper provides background information on  StARS and proposes design alternatives for the creation of building block (census block and tract) population and housing estimates after 2000.