You have to follow it up with the authorities concerned.
You make sure that why it is delayed and where it is held up.
As per Karnataka Munipalities model bye laws 2017 and educational building is defined as:
‘Educational Building’- Includes a building exclusively used for a school or college,
recognized by the appropriate Board or University, or any other Competent Authority
involving assembly for instruction, education or recreation incidental to educational use,
and including a building for such other uses as research institution. It shall also include
quarters for essential staff required to reside in the premises, and building used as a hostel
captive to an educational institution whether situated in its campus or outside.
Have you folowed the norms for this including approaval of the plan and also the regularisation formality.
Without knowing the status of your application for this conversion, no legal opinion can be rendered because the hideen facts are not known