In Section III you need to fill Details of Site and Building

Building Regularization Site & Building Details
Building Regularization Site & Building Details

Click yes if you have taken prior building permission

We need to fill details like Plot area in Sq. Mtrs (1 Sq. Yard = 0.836 Sq Mtrs). Convert all required values in Mts before hand to fill the application fast. You will need Market value certificate, Last Property Tax Receipt, Building Construction Date, Building Category Type

In Section IV you need to fill in details of the Site and Building like Floor number, Building Constructed Status (i.e.Deviation or Unauthorized), Building Usage type, Floor/Flat plinth area in Sq. Ft, Building area as per sanctioned plan in Sq. Ft, Build up area as on ground Sq. Ft, Property Tax number. If you have more than one floor click add new floor and fill in the same details for each floor.