A Columbia-based developer is requesting rezoning of 50 acres of office park-research land near new Route 100 and Executive Park Drive for apartments.

K & M Development Corp. Inc. filed the request yesterday for zoning authority to build as many as 750 apartments and condominiums on the site west of Loew's Columbia Palace Nine theater and Howard High School. "The concept is to have condominium units which can be used as starter homes and affordable housing," said Richard B. Talkin, an attorney for the development firm.